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Garg T, Velasco PF, Patai EZ, Malcolm CP, Kovalets V, Bohbot VD, Coutrot A, Hegarty M, Hornberger M, Spiers HJ. The relationship between object-based spatial ability and virtual navigation performance. PLoS One 2024; 19:e0298116. [PMID: 38722850 PMCID: PMC11081363 DOI: 10.1371/journal.pone.0298116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 01/16/2024] [Indexed: 05/13/2024] Open
Abstract
Spatial navigation is a multi-faceted behaviour drawing on many different aspects of cognition. Visuospatial abilities, such as mental rotation and visuospatial working memory, in particular, may be key factors. A range of tests have been developed to assess visuospatial processing and memory, but how such tests relate to navigation ability remains unclear. This understanding is important to advance tests of navigation for disease monitoring in various disorders (e.g., Alzheimer's disease) where spatial impairment is an early symptom. Here, we report the use of an established mobile gaming app, Sea Hero Quest (SHQ), as a measure of navigation ability in a sample of young, predominantly female university students (N = 78; 20; female = 74.3%; mean age = 20.33 years). We used three separate tests of navigation embedded in SHQ: wayfinding, path integration and spatial memory in a radial arm maze. In the same participants, we also collected measures of mental rotation (Mental Rotation Test), visuospatial processing (Design Organization Test) and visuospatial working memory (Digital Corsi). We found few strong correlations across our measures. Being good at wayfinding in a virtual navigation test does not mean an individual will also be good at path integration, have a superior memory in a radial arm maze, or rate themself as having a strong sense of direction. However, we observed that participants who were good in the wayfinding task of SHQ tended to perform well on the three visuospatial tasks examined here, and to also use a landmark strategy in the radial maze task. These findings help clarify the associations between different abilities involved in spatial navigation.
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Affiliation(s)
- Tanya Garg
- Department of Experimental Psychology, Division of Psychology and Language Sciences, Institute of Behavioural Neuroscience, University College London, London, United Kingdom
| | | | - Eva Zita Patai
- Department of Experimental Psychology, Division of Psychology and Language Sciences, Institute of Behavioural Neuroscience, University College London, London, United Kingdom
- Department of Psychology, School of Biological and Behavioural Sciences, Queen Mary University, London, United Kingdom
| | - Charlotte P. Malcolm
- Department of Experimental Psychology, Division of Psychology and Language Sciences, Institute of Behavioural Neuroscience, University College London, London, United Kingdom
| | - Victor Kovalets
- Department of Experimental Psychology, Division of Psychology and Language Sciences, Institute of Behavioural Neuroscience, University College London, London, United Kingdom
| | - Veronique D. Bohbot
- Faculty of Medicine, Department of Psychiatry, Douglas Mental Health University Institute, McGill University, McGill, Canada
| | | | - Mary Hegarty
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Michael Hornberger
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Hugo J. Spiers
- Department of Experimental Psychology, Division of Psychology and Language Sciences, Institute of Behavioural Neuroscience, University College London, London, United Kingdom
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Krut' VG, Kalinichenko AL, Maltsev DI, Jappy D, Shevchenko EK, Podgorny OV, Belousov VV. Optogenetic and chemogenetic approaches for modeling neurological disorders in vivo. Prog Neurobiol 2024; 235:102600. [PMID: 38548126 DOI: 10.1016/j.pneurobio.2024.102600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 02/26/2024] [Accepted: 03/22/2024] [Indexed: 04/01/2024]
Abstract
Animal models of human neurological disorders provide valuable experimental tools which enable us to study various aspects of disorder pathogeneses, ranging from structural abnormalities and disrupted metabolism and signaling to motor and mental deficits, and allow us to test novel therapies in preclinical studies. To be valid, these animal models should recapitulate complex pathological features at the molecular, cellular, tissue, and behavioral levels as closely as possible to those observed in human subjects. Pathological states resembling known human neurological disorders can be induced in animal species by toxins, genetic factors, lesioning, or exposure to extreme conditions. In recent years, novel animal models recapitulating neuropathologies in humans have been introduced. These animal models are based on synthetic biology approaches: opto- and chemogenetics. In this paper, we review recent opto- and chemogenetics-based animal models of human neurological disorders. These models allow for the creation of pathological states by disrupting specific processes at the cellular level. The artificial pathological states mimic a range of human neurological disorders, such as aging-related dementia, Alzheimer's and Parkinson's diseases, amyotrophic lateral sclerosis, epilepsy, and ataxias. Opto- and chemogenetics provide new opportunities unavailable with other animal models of human neurological disorders. These techniques enable researchers to induce neuropathological states varying in severity and ranging from acute to chronic. We also discuss future directions for the development and application of synthetic biology approaches for modeling neurological disorders.
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Affiliation(s)
- Viktoriya G Krut'
- Pirogov Russian National Research Medical University, Moscow 117997, Russia; Federal Center of Brain Research and Neurotechnologies, Federal Medical Biological Agency, Moscow 117997, Russia
| | - Andrei L Kalinichenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia
| | - Dmitry I Maltsev
- Pirogov Russian National Research Medical University, Moscow 117997, Russia; Federal Center of Brain Research and Neurotechnologies, Federal Medical Biological Agency, Moscow 117997, Russia; Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia
| | - David Jappy
- Federal Center of Brain Research and Neurotechnologies, Federal Medical Biological Agency, Moscow 117997, Russia
| | - Evgeny K Shevchenko
- Federal Center of Brain Research and Neurotechnologies, Federal Medical Biological Agency, Moscow 117997, Russia
| | - Oleg V Podgorny
- Pirogov Russian National Research Medical University, Moscow 117997, Russia; Federal Center of Brain Research and Neurotechnologies, Federal Medical Biological Agency, Moscow 117997, Russia; Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia.
| | - Vsevolod V Belousov
- Pirogov Russian National Research Medical University, Moscow 117997, Russia; Federal Center of Brain Research and Neurotechnologies, Federal Medical Biological Agency, Moscow 117997, Russia; Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; Life Improvement by Future Technologies (LIFT) Center, Skolkovo, Moscow 143025, Russia.
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Wu HP, Nakul E, Betka S, Lance F, Herbelin B, Blanke O. Out-of-body illusion induced by visual-vestibular stimulation. iScience 2024; 27:108547. [PMID: 38161418 PMCID: PMC10755362 DOI: 10.1016/j.isci.2023.108547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/22/2023] [Accepted: 11/20/2023] [Indexed: 01/03/2024] Open
Abstract
Out-of-body experiences (OBEs) are characterized by the subjective feeling of being located outside one's physical body and perceiving one's own body from an elevated perspective looking downwards. OBEs have been correlated with abnormal integration of bodily signals, including visual and vestibular information. In two studies, we used mixed reality combined with a motion platform to manipulate visual and vestibular integration in healthy participants. Behavioral data and questionnaires show that congruent visual-vestibular stimulation in a self-centered reference frame induced an OBE-like illusion characterized by elevated self-location and feelings of disembodiment and lightness. The OBE-like illusion was also modulated by individuals' visual field dependency assessed by the Rod and Frame Test. These results show that the manipulation of visual-vestibular stimulation in the present study induces various aspects of OBEs and further link OBE to congruency mechanisms between visual and vestibular gravitational and self-motion cues.
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Affiliation(s)
- Hsin-Ping Wu
- Laboratory of Cognitive Neuroscience, Neuro-X Institute & Brain Mind Institute, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Estelle Nakul
- Laboratory of Cognitive Neuroscience, Neuro-X Institute & Brain Mind Institute, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Sophie Betka
- Laboratory of Cognitive Neuroscience, Neuro-X Institute & Brain Mind Institute, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Florian Lance
- Laboratory of Cognitive Neuroscience, Neuro-X Institute & Brain Mind Institute, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Bruno Herbelin
- Laboratory of Cognitive Neuroscience, Neuro-X Institute & Brain Mind Institute, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Olaf Blanke
- Laboratory of Cognitive Neuroscience, Neuro-X Institute & Brain Mind Institute, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Geneva, Switzerland
- Department of Clinical Neurosciences, University Hospital Geneva, Geneva, Switzerland
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Smith LJ, Wilkinson D, Bodani M, Surenthiran SS. Cognition in vestibular disorders: state of the field, challenges, and priorities for the future. Front Neurol 2024; 15:1159174. [PMID: 38304077 PMCID: PMC10830645 DOI: 10.3389/fneur.2024.1159174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 01/05/2024] [Indexed: 02/03/2024] Open
Abstract
Vestibular disorders are prevalent and debilitating conditions of the inner ear and brain which affect balance, coordination, and the integration of multisensory inputs. A growing body of research has linked vestibular disorders to cognitive problems, most notably attention, visuospatial perception, spatial memory, and executive function. However, the mechanistic bases of these cognitive sequelae remain poorly defined, and there is a gap between our theoretical understanding of vestibular cognitive dysfunction, and how best to identify and manage this within clinical practice. This article takes stock of these shortcomings and provides recommendations and priorities for healthcare professionals who assess and treat vestibular disorders, and for researchers developing cognitive models and rehabilitation interventions. We highlight the importance of multidisciplinary collaboration for developing and evaluating clinically relevant theoretical models of vestibular cognition, to advance research and treatment.
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Affiliation(s)
- Laura J. Smith
- Centre for Preventative Neurology, Wolfson Institute of Population Health, Queen Mary University of London, London, United Kingdom
- School of Psychology, Keynes College, University of Kent, Kent, United Kingdom
| | - David Wilkinson
- School of Psychology, Keynes College, University of Kent, Kent, United Kingdom
| | - Mayur Bodani
- School of Psychology, Keynes College, University of Kent, Kent, United Kingdom
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Chen CC, Bery AK, Chang TP. Weak nystagmus in the dark persists for months after acute unilateral vestibular loss. Front Neurol 2023; 14:1327735. [PMID: 38162452 PMCID: PMC10754966 DOI: 10.3389/fneur.2023.1327735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 11/29/2023] [Indexed: 01/03/2024] Open
Abstract
Background Weak nystagmus with fixation removed can be seen both in normal individuals and in recovery from a unilateral vestibular insult, thus its clinical significance is unclear in patients with dizziness. We thus sought to compare features of nystagmus at various stages following unilateral vestibular loss (UVL). Methods We enrolled thirty consecutive patients after acute UVL with impaired vestibulo-ocular reflex (VOR) gain. The patients were allocated into three groups according to time from onset of symptoms: acute (1-7 days), subacute (8-30 days), and chronic (>30 days). Patients underwent video-oculography (with and without fixation) and video head impulse testing (vHIT) to determine VOR gain. We examined the relationships amongst SPV, VOR gain, and time from symptom onset across groups. Results There were 11, 10, and 9 patients in the acute, subacute, and chronic stages of UVL, respectively. With visual fixation, only 8 patients (26.7%) demonstrated nystagmus, all from the acute group. With fixation removed, 26 patients (86.7%) exhibited spontaneous nystagmus, including 90.9%, 90%, and 77.8% of the patients from the acute, subacute, and chronic groups, respectively. Horizontal nystagmus was paralytic (i.e., fast phase contralesional) in 25 (96.7%) cases. Horizontal SPV was negatively correlated with logarithm of time from onset to examination (r = -0.48, p = 0.007) and weakly negatively correlated with ipsilesional VOR gain (r = -0.325, p = 0.08). Conclusion In the subacute or chronic stages of UVL, paralytic nystagmus with fixation removed persisted at a low intensity. Therefore, weak nystagmus in the dark may have diagnostic value in chronic dizziness.
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Affiliation(s)
- Chih-Chung Chen
- Dizziness and Balance Disorder Center, Taipei Medical University–Shuang Ho Hospital, New Taipei City, Taiwan
- Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan
- Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Anand K. Bery
- Division of Neuro-Visual and Vestibular Disorders, Department of Neurology, The Johns Hopkins Hospital, Baltimore, MD, United States
| | - Tzu-Pu Chang
- Department of Neurology/Neuro-medical Scientific Center, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung, Taiwan
- Department of Neurology, School of Medicine, Tzu Chi University, Hualien, Taiwan
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Grove CR, Klatt BN, Wagner AR, Anson ER. Vestibular perceptual testing from lab to clinic: a review. Front Neurol 2023; 14:1265889. [PMID: 37859653 PMCID: PMC10583719 DOI: 10.3389/fneur.2023.1265889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 09/18/2023] [Indexed: 10/21/2023] Open
Abstract
Not all dizziness presents as vertigo, suggesting other perceptual symptoms for individuals with vestibular disease. These non-specific perceptual complaints of dizziness have led to a recent resurgence in literature examining vestibular perceptual testing with the aim to enhance clinical diagnostics and therapeutics. Recent evidence supports incorporating rehabilitation methods to retrain vestibular perception. This review describes the current field of vestibular perceptual testing from scientific laboratory techniques that may not be clinic friendly to some low-tech options that may be more clinic friendly. Limitations are highlighted suggesting directions for additional research.
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Affiliation(s)
- Colin R. Grove
- Department of Otolaryngology Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Division of Physical Therapy, Department of Physical Medicine and Rehabilitation School of Medicine, Emory University, Atlanta, GA, United States
| | - Brooke N. Klatt
- Physical Therapy Department, University of Pittsburgh, Pittsburgh, PA, United States
| | - Andrew R. Wagner
- Department of Otolaryngology—Head and Neck Surgery, Ohio State University Wexner Medical Center, Columbus, OH, United States
- School of Health and Rehabilitation Sciences, Ohio State University, Columbus, OH, United States
| | - Eric R. Anson
- Department of Otolaryngology, University of Rochester, Rochester, NY, United States
- Physical Therapy Department, University of Rochester, Rochester, NY, United States
- Department of Neuroscience, University of Rochester, Rochester, NY, United States
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Søndergaard K, Curtis DJ, Caye-Thomasen P, Juhl CB. The reliability and agreement of scores in a novel balance measure for older adults: Specific Training According to BaLance Evaluation (STABLE). Disabil Rehabil 2023; 45:3582-3594. [PMID: 36205568 DOI: 10.1080/09638288.2022.2130446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 09/25/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE Falls are the leading cause of injury and premature death among community dwelling elderly but can be prevented through comprehensive balance rehabilitation which ideally targets the patient's specific needs. In this study, we evaluate the reliability and agreement of six novel clinical measures of different balance domains which applied in a patient-specific balance profile guides exercise prescription in balance rehabilitation. MATERIALS AND METHODS The intra-rater reliability and agreement of the six measures were evaluated on the same day in six different cohorts of elderly with balance disability (n = 65-100). Further, the inter-day intra-rater and inter-rater and test-retest reliability and agreement of the measures and the balance profile were evaluated (n = 100). RESULTS The intra-day intra-rater reliability and agreement was moderate to excellent (ICC2.1 = 0.525-0.968, with SDC% = 6.5-284.9%) but poor to good for the inter-day conditions (ICC2.1 = 0.123-0.832, with SDC% = 6.6-229.2%). The reliability of classifying the lower domain in the balance profile was fair, with kappa = 0.56 (95%CI 0.36-0.76). CONCLUSIONS Five of the six measures may reliably be applied to measure balance disability and to guide rehabilitation. Implications for rehabilitationBalance disability is the primary reason for accidental falls among elderly but can be prevented through comprehensive individualized balance rehabilitation.Specific Training According to BaLance Evaluation (STABLE) is a novel approach for designing effective balance exercises based on clinical measurements.Five of the six measures are reliable when applied in a patient-specific balance profile to guide rehabilitation following the STABLE approach.
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Affiliation(s)
- Kasper Søndergaard
- Department of Occupational and Physical Therapy, University Hospital Herlev and Gentofte, Hellerup, Denmark
- Department of ORL, H&N Surgery and Audiology, University Hospital Rigshospitalet, Copenhagen, Denmark
- Department of Sports Science and Clinical Biomechanics, Research Unit for Musculoskeletal Function and Physiotherapy, University of Southern Denmark, Odense M, Denmark
| | - Derek John Curtis
- Child Centre Copenhagen, The Child and Youth Administration, Copenhagen Ø, Denmark
| | - Per Caye-Thomasen
- Department of ORL, H&N Surgery and Audiology, University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Carsten Bogh Juhl
- Department of Occupational and Physical Therapy, University Hospital Herlev and Gentofte, Hellerup, Denmark
- Department of Sports Science and Clinical Biomechanics, Research Unit for Musculoskeletal Function and Physiotherapy, University of Southern Denmark, Odense M, Denmark
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Lacour M, Lopez C, Thiry A, Tardivet L. Vestibular rehabilitation improves spontaneous nystagmus normalization in patients with acute unilateral vestibulopathy. FRONTIERS IN REHABILITATION SCIENCES 2023; 4:1122301. [PMID: 37325127 PMCID: PMC10264803 DOI: 10.3389/fresc.2023.1122301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 05/10/2023] [Indexed: 06/17/2023]
Abstract
Introduction Spontaneous nystagmus (SN) can be observed after acute unilateral vestibulopathy (AUVP). The slow phase eye velocity of the SN progressively decreases in darkness as the result of rebalanced neurophysiological activity between both vestibular nuclei, a process that can take several months. Although this compensatory process can occur spontaneously, there is poor evidence that vestibular rehabilitation (VR) can facilitate the process. Methods We documented the natural time course of SN reduction in patients with AUVP, as well as the effects of VR by means of a unilateral rotation paradigm. In a retrospective study (Study 1: n = 126 AUVP patients), we compared the time course of the SN reduction in patients with VR (n = 33) and without VR (n = 93). In a prospective study (Study 2: n = 42 AUVP patients), we compared the effects of early VR (n = 22; initiated within the first two weeks of symptoms onset) or late VR (n = 20; initiated after the second week of symptoms onset) on the time course of the SN reduction. Results Study 1 showed shorter median time of SN normalization in patients with VR compared to patients without VR (14 days and 90 days, respectively). Study 2 showed that AUVP patients with early and late VR had a similar median time of SN normalization. The SN slow phase eye velocity was significantly decreased as early as the end of the first VR session in both groups, and kept decreasing at each subsequent VR session. In the early VR group, 38% of the patients had slow phase eye velocity below 2°/s after the first VR session, 100% after the fifth session. Similar findings were observed in the late VR group. Discussion Taken together, these results indicate that VR with a unidirectional rotation paradigm speeds up the normalization of SN. This effect seems independent of the time between symptoms onset and commencement of VR, but early intervention is recommended to speed up the SN reduction.
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Affiliation(s)
- Michel Lacour
- Aix-Marseille University, CNRS, Laboratory of Cognitive Neuroscience (LNC), FR3C, Marseille, France
- Independent Researcher, Fuveau, France
| | - Christophe Lopez
- Aix-Marseille University, CNRS, Laboratory of Cognitive Neuroscience (LNC), FR3C, Marseille, France
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El Mahmoudi N, Laurent C, Péricat D, Watabe I, Lapotre A, Jacob PY, Tonetto A, Tighilet B, Sargolini F. Long-lasting spatial memory deficits and impaired hippocampal plasticity following unilateral vestibular loss. Prog Neurobiol 2023; 223:102403. [PMID: 36821981 DOI: 10.1016/j.pneurobio.2023.102403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/25/2022] [Accepted: 01/04/2023] [Indexed: 02/23/2023]
Abstract
Unilateral vestibular loss (UVL) induces a characteristic vestibular syndrome composed of various posturo-locomotor, oculomotor, vegetative and perceptivo-cognitive symptoms. Functional deficits are progressively recovered over time during vestibular compensation, that is supported by the expression of multiscale plasticity mechanisms. While the dynamic of post-UVL posturo-locomotor and oculomotor deficits is well characterized, the expression over time of the cognitive deficits, and in particular spatial memory deficits, is still debated. In this study we aimed at investigating spatial memory deficits and their recovery in a rat model of unilateral vestibular neurectomy (UVN), using a wide spectrum of behavioral tasks. In parallel, we analyzed markers of hippocampal plasticity involved in learning and memory. Our results indicate the UVN affects all domains of spatial memory, from working memory to reference memory and object-in-place recognition. These deficits are associated with long-lasting impaired plasticity in the ipsilesional hippocampus. These results highlight the crucial role of symmetrical vestibular information in spatial memory and contribute to a better understanding of the cognitive disorders observed in vestibular patients.
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Affiliation(s)
- Nada El Mahmoudi
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France.
| | - Célia Laurent
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - David Péricat
- Université de Toulouse Paul Sabatier -CNRS, Institut de pharmacologie et de biologie structurale, Toulouse, France
| | - Isabelle Watabe
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - Agnès Lapotre
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - Pierre-Yves Jacob
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - Alain Tonetto
- Aix Marseille Université-CNRS, Centrale Marseille, FSCM (FR 1739), PRATIM, F-13397 Marseille, France
| | - Brahim Tighilet
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France
| | - Francesca Sargolini
- Aix-Marseille Université -CNRS, Laboratoire de Neurosciences Cognitives, LNC UMR 7291, Centre Saint Charles, Case C; 3 Place Victor Hugo, 13331, Marseille Cedex 03, France.
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Hemm S, Baumann D, Duarte da Costa V, Tarnutzer AA. Test-re-test reliability and dynamics of the Fukuda–Unterberger stepping test. Front Neurol 2023; 14:1128760. [PMID: 37064178 PMCID: PMC10090507 DOI: 10.3389/fneur.2023.1128760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 03/15/2023] [Indexed: 03/31/2023] Open
Abstract
BackgroundThe Fukuda-stepping-test (FST), i.e., repetitive walking on the spot while blindfolded, has been proposed as a means to assess the integrity of the vestibular pathways. While its sensitivity to detect abnormalities in patients is limited, it may be useful in studying the physiology of the subjective-straight-ahead (SSA). Considering reported systematic shifts in SSA in humans, we hypothesize that such asymmetries arise from individual differences in the orientation/configuration of the macular organs and in central processing of vestibular input. We hypothesize that such asymmetries are stable over time in individual subjects. Alternatively, such asymmetries may arise from random noise in the sensory/motor systems involved, demonstrating low reproducibility over time.Materials and methodsTwenty-four subjects walked on the spot over 60 s while blindfolded (n = 6 trials per subject). Using an inertial measurement unit (IMU) placed at the chest, angular deviations were recorded and compared to manually-measured final positions. Both static (direction, magnitude) and dynamic (time-to-onset of deviation, pattern of deviations) parameters were retrieved from the yaw slopes.ResultsSignificant deviations were found in 15/24 participants for the manual measurements (leftwards = 8; rightwards = 7), whereas when using the IMU-sensor 13/24 participants showed significant shifts (leftwards = 9; rightwards = 4). There was a high correlation (0.98) between manually measured rotation angles (average absolute deviations = 58.0 deg ± 48.6 deg; intra-individual variability = 39 deg ± 24 deg) and sensor-based yaw slopes (1.00 deg/s ± 0.88 deg/s; 0.67 deg/s ± 0.41 deg/s). Relevant yaw deviation was detected 22.1 s ± 12.3 s (range = 5.6 s-59.2 s) after the onset of marching (no relevant yaw-deviation in 15/139 measurements), showing a mostly linear behavior over time.ConclusionWe observed significant inter-individual variability in task performance in the FST, reproducing findings from previous studies. With test-re-test reliability being moderate only, but at the same time observing a preference in the side of shifts in most trials and subjects, we conclude that likely both individually varying estimates of straight-ahead and random noise contribute to the pattern of angular deviations observed. Using an IMU-sensory based approach, additional dynamic parameters could be retrieved, emphasizing the value of such a quantitative approach over manual measurements. Such an approach may provide useful additional information to distinguish patients from healthy controls.
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Affiliation(s)
- Simone Hemm
- School of Life Sciences, Institute for Medical Engineering and Medical Informatics, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
| | - Denise Baumann
- School of Life Sciences, Institute for Medical Engineering and Medical Informatics, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
| | - Vasco Duarte da Costa
- School of Life Sciences, Institute for Medical Engineering and Medical Informatics, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
| | - Alexander Andrea Tarnutzer
- Neurology, Cantonal Hospital of Baden, Baden, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
- *Correspondence: Alexander Andrea Tarnutzer,
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How vestibular dysfunction transforms into symptoms of depersonalization and derealization? J Neurol Sci 2023; 444:120530. [PMID: 36586207 DOI: 10.1016/j.jns.2022.120530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 11/01/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND Psychiatric Depersonalization/Derealization (DPDR) symptoms were demonstrated in patients with peripheral vestibular disorders. However, only semicircular canals (SCCs) dysfunction was evaluated, therefore, otoliths' contribution to DPDR is unknown. Also, DPDR symptoms in patients with central vestibular dysfunction are presently unknown. DPDR was also studied in the context of spatial disorientation and anxiety, but the relation of these cognitive and emotional functions to vestibular dysfunction requires clarification. METHODS We tested patients with peripheral Bilateral Vestibular Hypofunction (pBVH), Machado Joseph Disease (MJD) with cerebellar and central bilateral vestibular hypofunction, and healthy controls. Participants completed the video Head Impulse Test (vHIT) for SCCs function, cervical Vestibular Evoked Myogenic Potentials test (cVEMPt) for sacculi function, Body Sensation Questionnaire (BSQ) for panic anxiety, Object Perspective-Taking test (OPTt) for spatial orientation and Cox & Swinson DPDR inventory for DPDR symptoms. RESULTS pBVH patients showed significant SCCs and sacculi dysfunction, spatial disorientation, elevated panic anxiety, and DPDR symptoms. MJD patients showed significant SCCs hypofunction but preserved sacculi function, spatial disorientation but normal levels of panic anxiety and DPDR symptoms. Only pBVH patients demonstrated a positive correlation between the severity of the DPDR and spatial disorientation and panic anxiety. CONCLUSIONS DPDR develops in association with sacculi dysfunction, either with or without SSCs dysfunction. Spatial disorientation and anxiety seem to mediate the transformation of vestibular dysfunction into DPDR symptoms. DPDR does not develop in MJD with central vestibular hypofunction but a normal saccular response. We propose a three-step model that describes the development of DPDR symptoms in vestibular patients.
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Omara A, Basiouny EM, Shabrawy ME, Shafei RRE. The correlation between anxiety, depression, and vertigo: a cross-sectional study. THE EGYPTIAN JOURNAL OF OTOLARYNGOLOGY 2022. [DOI: 10.1186/s43163-022-00318-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
Background
Dizziness, including vertigo, affects approximately 15% to over 20% of adults each year. A significant proportion of patients with vertigo develop secondary psychiatric disorders throughout their disease. On the other hand, patients with psychiatric disorders frequently report dizziness as a co-occurring symptom of their illness. The purpose of this study was to screen the prevalence of depression and anxiety indices in dizzy patients and their relation to the severity of their dizziness handicap by administering two different questionnaires: The dizziness handicap inventory (DHI) and the Hospital Anxiety and Depression Scale (HADS).
Results
Psychological assessments revealed that 49% of the study group was normal, 29% had anxiety, 7% had depression, and 15% had both anxiety and depression. Besides, vestibular neuritis was associated with a higher mean anxiety score, whereas Meniere's disease was associated with a higher mean depression score.
Conclusion
As this study has shown, there was a statistically significant positive correlation between anxiety and depression scores and physical, emotional, functional, and total DHI scores. Screening and treatment of co-morbid mental health disorders are critical for appropriate management of vertigo disability that leads to a higher quality of life and fewer complications.
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13
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Hilber P. The Role of the Cerebellar and Vestibular Networks in Anxiety Disorders and Depression: the Internal Model Hypothesis. CEREBELLUM (LONDON, ENGLAND) 2022; 21:791-800. [PMID: 35414040 DOI: 10.1007/s12311-022-01400-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
Clinical data and animal studies confirmed that the cerebellum and the vestibular system are involved in emotions. Nowadays, no real consensus has really emerged to explain the clinical symptoms in humans and behavioral deficits in the animal models. We envisage here that the cerebellum and the vestibular system play complementary roles in emotional reactivity. The cerebellum integrates a large variety of exteroceptive and proprioceptive information necessary to elaborate and to update the internal model: in emotion, as in motor processes, it helps our body and self to adapt to the environment, and to anticipate any changes in such environment in order to produce a time-adapted response. The vestibular system provides relevant environmental stimuli (i.e., gravity, self-position, and movement) and is involved in self-perception. Consequently, cerebellar or vestibular disorders could generate « internal fake news» (due to lack or false sensory information and/or integration) that could, in turn, generate potential internal model deficiencies. In this case, the alterations provoke false anticipation of motor command and external sensory feedback, associated with unsuited behaviors. As a result, the individual becomes progressively unable to cope with the environmental solicitation. We postulate that chronically unsuited, and potentially inefficient, behavioral and visceral responses to environmental solicitations lead to stressful situations. Furthermore, this inability to adapt to the context of the situation generates chronic anxiety which could precede depressive states.
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Affiliation(s)
- Pascal Hilber
- UNIROUEN, INSERM U1245, Cancer and Brain Genomics, Normandie University, 76000, Rouen, France.
- Institute for Research and Innovation in Biomedicine (IRIB), 76000, Rouen, France.
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14
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Tarnutzer AA, Duarte da Costa V, Baumann D, Hemm S. Heading Direction Is Significantly Biased by Preceding Whole-Body Roll-Orientation While Lying. Front Neurol 2022; 13:868144. [PMID: 35509993 PMCID: PMC9058079 DOI: 10.3389/fneur.2022.868144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/18/2022] [Indexed: 12/05/2022] Open
Abstract
Background After a prolonged static whole-body roll-tilt, a significant bias of the internal estimates of the direction of gravity has been observed when assessing the subjective visual vertical. Objective We hypothesized that this post-tilt bias represents a more general phenomenon, broadly affecting spatial orientation and navigation. Specifically, we predicted that after the prolonged roll-tilt to either side perceived straight-ahead would also be biased. Methods Twenty-five healthy participants were asked to rest in three different lying positions (supine, right-ear-down, and left-ear-down) for 5 min (“adaptation period”) prior to walking straight-ahead blindfolded for 2 min. Walking was recorded with the inertial measurement unit sensors attached to different body locations and with sensor shoe insoles. The raw data was segmented with a gait–event detection method. The Heading direction was determined and linear mixed-effects models were used for statistical analyses. Results A significant bias in heading into the direction of the previous roll-tilt position was observed in the post-adaptation trials. This bias was identified in both measurement systems and decreased again over the 2-min walking period. Conclusions The bias observed further confirms the influence of prior knowledge on spatial orientation and navigation. Specifically, it underlines the broad impact of a shifting internal estimate of direction of gravity over a range of distinct paradigms, illustrating similar decay time constants. In the broader context, the observed bias in perceived straight-ahead emphasizes that getting up in the morning after a good night's sleep is a vulnerable period, with an increased risk of falls and fall-related injuries due to non-availability of optimally tuned internal estimates of the direction of gravity and the direction of straight-ahead.
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Affiliation(s)
- Alexander Andrea Tarnutzer
- Department of Neurology, Cantonal Hospital of Baden, Baden, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
- *Correspondence: Alexander Andrea Tarnutzer
| | - Vasco Duarte da Costa
- School of Life Sciences, Institute for Medical Engineering and Medical Informatics, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
| | - Denise Baumann
- School of Life Sciences, Institute for Medical Engineering and Medical Informatics, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
| | - Simone Hemm
- School of Life Sciences, Institute for Medical Engineering and Medical Informatics, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
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15
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Sozzi S, Schieppati M. Balance Adaptation While Standing on a Compliant Base Depends on the Current Sensory Condition in Healthy Young Adults. Front Hum Neurosci 2022; 16:839799. [PMID: 35399363 PMCID: PMC8989851 DOI: 10.3389/fnhum.2022.839799] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 02/03/2022] [Indexed: 01/06/2023] Open
Abstract
Background Several investigations have addressed the process of balance adaptation to external perturbations. The adaptation during unperturbed stance has received little attention. Further, whether the current sensory conditions affect the adaptation rate has not been established. We have addressed the role of vision and haptic feedback on adaptation while standing on foam. Methods In 22 young subjects, the analysis of geometric (path length and sway area) and spectral variables (median frequency and mean level of both total spectrum and selected frequency windows) of the oscillation of the centre of feet pressure (CoP) identified the effects of vision, light-touch (LT) or both in the anteroposterior (AP) and mediolateral (ML) direction over 8 consecutive 90 s standing trials. Results Adaptation was obvious without vision (eyes closed; EC) and tenuous with vision (eyes open; EO). With trial repetition, path length and median frequency diminished with EC (p < 0.001) while sway area and mean level of the spectrum increased (p < 0.001). The low- and high-frequency range of the spectrum increased and decreased in AP and ML directions, respectively. Touch compared to no-touch enhanced the rate of increase of the low-frequency power (p < 0.05). Spectral differences in distinct sensory conditions persisted after adaptation. Conclusion Balance adaptation occurs during standing on foam. Adaptation leads to a progressive increase in the amplitude of the lowest frequencies of the spectrum and a concurrent decrease in the high-frequency range. Within this common behaviour, touch adds to its stabilising action a modest effect on the adaptation rate. Stabilisation is improved by favouring slow oscillations at the expense of sway minimisation. These findings are preliminary to investigations of balance problems in persons with sensory deficits, ageing, and peripheral or central nervous lesion.
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Affiliation(s)
- Stefania Sozzi
- Centro Studi Attività Motorie (CSAM), Istituti Clinici Scientifici Maugeri SB (IRCCS), Pavia, Italy
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16
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Gammeri R, Léonard J, Toupet M, Hautefort C, van Nechel C, Besnard S, Machado ML, Nakul E, Montava M, Lavieille JP, Lopez C. Navigation strategies in patients with vestibular loss tested in a virtual reality T-maze. J Neurol 2022; 269:4333-4348. [PMID: 35306619 DOI: 10.1007/s00415-022-11069-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 01/09/2023]
Abstract
During navigation, humans mainly rely on egocentric and allocentric spatial strategies, two different frames of reference working together to build a coherent representation of the environment. Spatial memory deficits during navigation have been repeatedly reported in patients with vestibular disorders. However, little is known about how vestibular disorders can change the use of spatial navigation strategies. Here, we used a new reverse T-maze paradigm in virtual reality to explore whether vestibular loss specifically modifies the use of egocentric or allocentric spatial strategies in patients with unilateral (n = 23) and bilateral (n = 23) vestibular loss compared to healthy volunteers (n = 23) matched for age, sex and education level. Results showed that the odds of selecting and using a specific strategy in the T-maze were significantly reduced in both unilateral and bilateral vestibular loss. An exploratory analysis suggests that only right vestibular loss decreased the odds of adopting a spatial strategy, indicating an asymmetry of vestibular functions. When considering patients who used strategies to navigate, we observed that a bilateral vestibular loss reduced the odds to use an allocentric strategy, whereas a unilateral vestibular loss decreased the odds to use an egocentric strategy. Age was significantly associated with an overall lower chance to adopt a navigation strategy and, more specifically, with a decrease in the odds of using an allocentric strategy. We did not observe any sex difference in the ability to select and use a specific navigation strategy. Findings are discussed in light of previous studies on visuo-spatial abilities and studies of vestibulo-hippocampal interactions in peripheral vestibular disorders. We discuss the potential impact of the history of the disease (chronic stage in patients with a bilateral vestibulopathy vs. subacute stage in patients with a unilateral vestibular loss), of hearing impairment and non-specific attentional deficits in patients with vestibular disorders.
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Affiliation(s)
- Roberto Gammeri
- Aix Marseille University, CNRS, LNC, FR3C, Marseille, France.,Department of Psychology, University of Turin, Torino, Italy
| | - Jacques Léonard
- Aix Marseille University, CNRS, LNC, FR3C, Marseille, France
| | - Michel Toupet
- IRON, Institut de Recherche en Oto-Neurologie, Paris, France.,Centre d'Explorations Fonctionnelles Oto-Neurologiques, Paris, France
| | - Charlotte Hautefort
- IRON, Institut de Recherche en Oto-Neurologie, Paris, France.,Service ORL, Hôpital Lariboisière, Paris, France
| | - Christian van Nechel
- IRON, Institut de Recherche en Oto-Neurologie, Paris, France.,Unité Troubles de L'Équilibre Et Vertiges, CHU Brugmann, Bruxelles, Belgium.,Unité de Neuro-Ophtalmologie, CHU Erasme, Bruxelles, Belgium.,Clinique Des Vertiges, Bruxelles, Belgium
| | | | | | - Estelle Nakul
- Aix Marseille University, CNRS, LNC, FR3C, Marseille, France
| | - Marion Montava
- Department of Otorhinolaryngology, Head and Neck Surgery, Hôpital La Conception, APHM, Marseille, France
| | - Jean-Pierre Lavieille
- Department of Otorhinolaryngology, Head and Neck Surgery, Hôpital La Conception, APHM, Marseille, France
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17
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Lacour M, Tardivet L, Thiry A. Posture Deficits and Recovery After Unilateral Vestibular Loss: Early Rehabilitation and Degree of Hypofunction Matter. Front Hum Neurosci 2022; 15:776970. [PMID: 35185493 PMCID: PMC8855301 DOI: 10.3389/fnhum.2021.776970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 12/03/2021] [Indexed: 11/27/2022] Open
Abstract
Postural instability and balance impairment are disabling symptoms in patients with acute unilateral peripheral vestibular hypofunction (UVH). Vestibular rehabilitation (VR) is known to improve the vestibular compensation process, but (1) its effect on posture recovery remains poorly understood, (2) little is known about when VR must be done, and (3) whether the degree of vestibular loss matters is uncertain. We analyzed posture control under static (stable support) and dynamic (unstable support) postural tasks performed in different visual conditions [eye open (EO); eyes closed (EC); and optokinetic stimulation] using dynamic posturography. Non-linear analyses of the postural performance (wavelet transform, diffusion analysis, and fractal analysis) were performed in two groups of patients with UVH subjected to the same VR program based on the unidirectional rotation paradigm and performed either early (first 2 weeks) or later (fifth to the sixth week) after vertigo attack. Distribution of the angular horizontal vestibulo-ocular reflex (aVOR) gain values recorded on the hypofunction side before rehabilitation differentiated two distinct sub-groups (cluster analysis) with aVOR gains below or above 0.20. The postural performance of the four sub-groups of patients with UVH (early rehabilitation with aVOR gain <0.20: n = 25 or gain >0.20: n = 19; late rehabilitation with aVOR gain <0.20: n = 15 or gain >0.20: n = 10) tested before VR showed significantly altered postural parameters compared with healthy controls. Greater instability, higher energy to control posture, larger sway without feedback corrections, and lower time of automatic control of posture were observed in static conditions. The four sub-groups recovered near-normal postural performance after VR in the EO and EC conditions, but still exhibited altered postural performance with optokinetic stimulation. In dynamic posturography conditions and before VR, the percentage of patients able to perform the postural tasks with EC and optokinetic stimulation was significantly lower in the two sub-groups with aVOR gain <0.20. After VR, the improvement of the postural parameters depended on the stage of rehabilitation and the degree of vestibular hypofunction. The best balance function recovery was found in the sub-group with early VR and pre-rehabilitation aVOR gain above 0.20, the worst in the sub-group with late rehabilitation and aVOR gain below 0.20. These differences were seen when the vestibular input remains the main sensory cue to control balance, that is, on unstable support without vision or altered visual motion cues. These findings extend to dynamic balance recovery the crucial roles of early rehabilitation and degree of vestibular hypofunction which we have already highlighted for vestibulo-ocular reflex recovery.
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Affiliation(s)
- Michel Lacour
- Neurosciences Department, Aix-Marseille University/CNRS, Marseille, France
- 21 Impasse des Vertus, Fuveau, France
- *Correspondence: Michel Lacour,
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18
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Borel L, Honoré J, Bachelard-Serra M, Lavieille JP, Saj A. Representation of Body Orientation in Vestibular-Defective Patients Before and After Unilateral Vestibular Loss. Front Syst Neurosci 2021; 15:733684. [PMID: 34776883 PMCID: PMC8580062 DOI: 10.3389/fnsys.2021.733684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/27/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: The unilateral vestibular syndrome results in postural, oculomotor, perceptive, and cognitive symptoms. This study was designed to investigate the role of vestibular signals in body orientation representation, which remains poorly considered in vestibular patients. Methods: The subjective straight ahead (SSA) was investigated using a method disentangling translation and rotation components of error. Participants were required to align a rod with their body midline in the horizontal plane. Patients with right vestibular neurotomy (RVN; n =8) or left vestibular neurotomy (LVN; n = 13) or vestibular schwannoma resection were compared with 12 healthy controls. Patients were tested the day before surgery and during the recovery period, 7 days and 2 months after the surgery. Results: Before and after unilateral vestibular neurotomy, i.e., in the chronic phases, patients showed a rightward translation bias of their SSA, without rotation bias, whatever the side of the vestibular loss. However, the data show that the lower the translation error before neurotomy, the greater its increase 2 months after a total unilateral vestibular loss, therefore leading to a rightward translation of similar amplitude in the two groups of patients. In the early phase after surgery, SSA moved toward the operated side both in translation and in rotation, as typically found for biases occurring after unilateral vestibular loss, such as the subjective visual vertical (SVV) bias. Discussion and Conclusion: This study gives the first description of the immediate consequences and of the recovery time course of body orientation representation after a complete unilateral vestibular loss. The overall evolution differed according to the side of the lesion with more extensive changes over time before and after left vestibular loss. It is noteworthy that representational disturbances of self-orientation were highly unusual in the chronic stage after vestibular loss and similar to those reported after hemispheric lesions causing spatial neglect, while classical ipsilesional biases were reported in the acute stage. This study strongly supports the notion that the vestibular system plays a major role in body representation processes and more broadly in spatial cognition. From a clinical point of view, SSA appeared to be a reliable indicator for the presence of a vestibular disorder.
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Affiliation(s)
- Liliane Borel
- Cognitive Neurosciences Laboratory, UMR 7291, Aix Marseille University, CNRS, Marseille, France
| | - Jacques Honoré
- SCALab, UMR 9193, University of Lille, CNRS, Lille, France
| | - Mathilde Bachelard-Serra
- Department of Otorhinolaryngology, Head and Neck Surgery, Hôpital La Conception, APHM, Marseille, France.,Department of Otorhinolaryngology, Head and Neck Surgery, CHP Clairval, Marseille, France
| | - Jean-Pierre Lavieille
- Cognitive Neurosciences Laboratory, UMR 7291, Aix Marseille University, CNRS, Marseille, France.,Department of Otorhinolaryngology, Head and Neck Surgery, Hôpital La Conception, APHM, Marseille, France
| | - Arnaud Saj
- Laboratory for Behavioral Neurology and Imaging of Cognition, Department of Neuroscience, University of Geneva, Geneva, Switzerland.,Department of Psychology, University of Montréal, Montreal, QC, Canada.,Centre of Interdisciplinary Research in Rehabiliation of Montréal, CRIR/Institut Nazareth et Louis-Braille du CISSS de la Montérégie-Centre, Longueuil, QC, Canada
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19
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Neural Interruption by Unilateral Labyrinthectomy Biases the Directional Preference of Otolith-Related Vestibular Neurons. Brain Sci 2021; 11:brainsci11080987. [PMID: 34439606 PMCID: PMC8393366 DOI: 10.3390/brainsci11080987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/13/2021] [Accepted: 07/22/2021] [Indexed: 11/17/2022] Open
Abstract
Background: The directional preference of otolith-related vestibular neurons elucidates the neuroanatomical link of labyrinths, but few direct experimental data have been provided. Methods: The directional preference of otolith-related vestibular neurons was measured in the vestibular nucleus using chemically induced unilateral labyrinthectomy (UL). For the model evaluation, static and dynamic behavioral tests as well as a histological test were performed. Extracellular neural activity was recorded for the neuronal responses to the horizontal head rotation and the linear head translation. Results: Seventy-seven neuronal activities were recorded, and the total population was divided into three groups: left UL (20), sham (35), and right UL (22). Based on directional preference, two sub-groups were again classified as contra- and ipsi-preferred neurons. There was no significance in the number of those sub-groups (contra-, 15/35, 43%; ipsi-, 20/35, 57%) in the sham (p = 0.155). However, more ipsi-preferred neurons (19/22, 86%) were observed after right UL (p = 6.056 × 10−5), while left UL caused more contra-preferred neurons (13/20, 65%) (p = 0.058). In particular, the convergent neurons mainly led this biased difference (ipsi-, 100% after right UL and contra-, 89% after left UL) (p < 0.002). Conclusions: The directional preference of the neurons depended on the side of the lesion, and its dominance was mainly led by the convergent neurons.
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20
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Ferrè ER, Alsmith AJT, Haggard P, Longo MR. The vestibular system modulates the contributions of head and torso to egocentric spatial judgements. Exp Brain Res 2021; 239:2295-2302. [PMID: 34089070 PMCID: PMC8282570 DOI: 10.1007/s00221-021-06119-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 04/20/2021] [Indexed: 11/28/2022]
Abstract
Egocentric representations allow us to describe the external world as experienced from an individual's bodily location. We recently developed a novel method of quantifying the weight given to different body parts in egocentric judgments (the Misalignment Paradigm). We found that both head and torso contribute to simple alter-egocentric spatial judgments. We hypothesised that artificial stimulation of the vestibular system would provide a head-related signal, which might affect the weighting given to the head in egocentric spatial judgments. Bipolar Galvanic Vestibular Stimulation (GVS) was applied during the Misalignment Paradigm. A Sham stimulation condition was also included to control for non-specific effects. Our data show that the weight given to the head was increased during left anodal and right cathodal GVS, compared to the opposite GVS polarity (right anodal and left cathodal GVS) and Sham stimulation. That is, the polarity of GVS, which preferentially activates vestibular areas in the right cerebral hemisphere, influenced the relative weightings of head and torso in egocentric spatial judgments.
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Affiliation(s)
- Elisa R Ferrè
- Department of Psychology, Royal Holloway, University of London, London, UK.
| | | | - Patrick Haggard
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Matthew R Longo
- Department of Psychological Sciences, Birkbeck, University of London, London, UK.
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21
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Montardy Q, Wei M, Liu X, Yi T, Zhou Z, Lai J, Zhao B, Besnard S, Tighilet B, Chabbert C, Wang L. Selective optogenetic stimulation of glutamatergic, but not GABAergic, vestibular nuclei neurons induces immediate and reversible postural imbalance in mice. Prog Neurobiol 2021; 204:102085. [PMID: 34171443 DOI: 10.1016/j.pneurobio.2021.102085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 04/21/2021] [Accepted: 05/25/2021] [Indexed: 11/24/2022]
Abstract
Glutamatergic and GABAergic neurons represent the neural components of the medial vestibular nuclei. We assessed the functional role of glutamatergic and GABAergic neuronal pathways arising from the vestibular nuclei (VN) in the maintenance of gait and balance by optogenetically stimulating the VN in VGluT2-cre and GAD2-cre mice. We demonstrate that glutamatergic, but not GABAergic VN neuronal subpopulation is responsible for immediate and strong posturo-locomotor deficits, comparable to unilateral vestibular deafferentation models. During optogenetic stimulation, the support surface dramatically increased in VNVGluT2+ mice, and rapidly fell back to baseline after stimulation, whilst it remained unchanged during similar stimulation of VNGAD2+ mice. This effect persisted when vestibular tactilo kinesthesic plantar inputs were removed. Posturo-locomotor alterations evoked in VNVGluT2+ animals were still present immediately after stimulation, while they disappeared 1 h later. Overall, these results indicate a fundamental role for VNVGluT2+ neurons in balance and posturo-locomotor functions, but not for VNGAD2+ neurons, in this specific context. This new optogenetic approach will be useful to characterize the role of the different VN neuronal populations involved in vestibular physiology and pathophysiology.
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Affiliation(s)
- Q Montardy
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China; GDR Physiopathologie Vestibulaire - unité GDR2074 CNRS, France
| | - M Wei
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - X Liu
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China
| | - T Yi
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China
| | - Z Zhou
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China; McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - J Lai
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China
| | - B Zhao
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China
| | - S Besnard
- Aix Marseille University-CNRS, Laboratory of Sensory and Cognitive Neurosciences, UMR 7260, Team Pathophysiology and Therapy of Vestibular Disorders, Marseille, France; Université de Caen Normandie, CHU de Caen, Caen, France; GDR Physiopathologie Vestibulaire - unité GDR2074 CNRS, France
| | - B Tighilet
- Aix Marseille University-CNRS, Laboratory of Sensory and Cognitive Neurosciences, UMR 7260, Team Pathophysiology and Therapy of Vestibular Disorders, Marseille, France; GDR Physiopathologie Vestibulaire - unité GDR2074 CNRS, France.
| | - C Chabbert
- Aix Marseille University-CNRS, Laboratory of Sensory and Cognitive Neurosciences, UMR 7260, Team Pathophysiology and Therapy of Vestibular Disorders, Marseille, France; GDR Physiopathologie Vestibulaire - unité GDR2074 CNRS, France.
| | - L Wang
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China.
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22
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Cozma RS, Cristina MC, Cobzeanu MD, Olariu R, Bitere OR, Mârţu C, Dima-Cozma LC, Dascălu CG, Georgescu MG, Necula V, Rădulescu LM. Saccular function evolution related to cochlear implantation in hearing impaired children. ROMANIAN JOURNAL OF MORPHOLOGY AND EMBRYOLOGY 2021; 61:113-119. [PMID: 32747901 PMCID: PMC7728102 DOI: 10.47162/rjme.61.1.12] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Vestibular sensorial input is essential for psychomotor development of the very small children. In consequence, possible vestibular impairment induced by cochlear implantation in deaf children could affect the balance and walking learning process. Some of cochlear implanted children can present congenital vestibular deficit. The anatomical and embryological relation between auditory and vestibular system explains why congenital neurosensorial hearing loss may associate vestibular impairment. The cochlear implant surgery presents a vestibular lesion risk. Bilateral vestibulopathy, as it appears in early childhood, has a poor prognosis for the psychomotor and cognitive development. Even probably rare, bilateral vestibulopathy induced by simultaneous bilateral cochlear implantation can delay the acquisition of motor skills. This pathology can be avoided by an appropriate surgical indication related to the vestibular preoperative status. This study reports the vestibular saccular functional modifications after the cochlear implantation in children. The cervical vestibular evoked myogenic potentials (cVEMPs) were performed in children before and after the cochlear implantation. Since previous studies report different vestibular impairment related to the portelectrode insertion approach, another objective of our study was to assess the saccular postoperative status depending of the insertion by cochleostomy (CO) or through the round window (RW). We performed cVEMPs for 80 patients (135 cochlear implanted ears) before and after cochlear implantation. We have detected preoperative saccular areflexia in 33 (24.4%) ears. In the group of 102 (75.6%) ears with preoperative normal saccular function, 72 (70.6%) ears preserved the cVEMP response after the surgery, while in 30 (29.4%) ears the cVEMP response was lost. Reporting our findings to the portelectrode insertion method, we found normal saccular function in 73.3% of the cochlear implanted ears by RW surgical approach and in 68.42% ears by CO approach. These results suggest that the RW portelectrode insertion is the recommended strategy in order to avoid the saccular vestibular impairment.
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Affiliation(s)
- Romică Sebastian Cozma
- Department of Otorhinolaryngology, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy, Iaşi, Romania; ,
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23
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Lacour M, Thiry A, Tardivet L. Two conditions to fully recover dynamic canal function in unilateral peripheral vestibular hypofunction patients. J Vestib Res 2021; 31:407-421. [PMID: 33749626 DOI: 10.3233/ves-201557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The crucial role of early vestibular rehabilitation (VR) to recover a dynamic semicircular canal function was recently highlighted in patients with unilateral vestibular hypofunction (UVH). However, wide inter-individual differences were observed, suggesting that parameters other than early rehabilitation are involved. OBJECTIVE The aim of the study was to determine to what extent the degree of vestibular loss assessed by the angular vestibulo-ocular reflex (aVOR) gain could be an additional parameter interfering with rehabilitation in the recovery process. And to examine whether different VR protocols have the same effectiveness with regard to the aVOR recovery. METHODS The aVOR gain and the percentage of compensatory saccades were recorded in 81 UVH patients with the passive head impulse test before and after early VR (first two weeks after vertigo onset: N = 43) or late VR (third to sixth week after onset: N = 38) performed twice a week for four weeks. VR was performed either with the unidirectional rotation paradigm or gaze stability exercises. Supplementary outcomes were the dizziness handicap inventory (DHI) score, and the static and dynamic subjective visual vertical. RESULTS The cluster analysis differentiated two distinct populations of UVH patients with pre-rehab aVOR gain values on the hypofunction side below 0.20 (N = 42) or above 0.20 (N = 39). The mean gain values were respectively 0.07±0.05 and 0.34±0.12 for the lateral canal (p < 0.0001), 0.09±0.06 and 0.44±0.19 for the anterior canal (p < 0.0001). Patients with aVOR gains above 0.20 and early rehab fully recovered dynamic horizontal canal function (0.84±0.14) and showed very few compensatory saccades (18.7% ±20.1%) while those with gains below 0.20 and late rehab did not improve their aVOR gain value (0.16±0.09) and showed compensatory saccades only (82.9% ±23.7%). Similar results were found for the anterior canal function. Recovery of the dynamic function of the lateral canal was found with both VR protocols while it was observed with the gaze stability exercises only for the anterior canal. All the patients reduced their DHI score, normalized their static SVV, and exhibited uncompensated dynamic SVV. CONCLUSIONS Early rehab is a necessary but not sufficient condition to fully recover dynamic canal function. The degree of vestibular loss plays a crucial role too, and to be effective rehabilitation protocols must be carried out in the plane of the semicircular canals.
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Affiliation(s)
- Michel Lacour
- Neurosciences Department, Aix-Marseille University, CNRS, Marseille, France
| | - Alain Thiry
- Physiotherapist, Bd Dubouchage, Nice, France
| | - Laurent Tardivet
- Otorhinolaryngology Department, CHU Nice, Voie Romaine, Nice, France
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24
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Saj A, Bachelard-Serra M, Lavieille JP, Honoré J, Borel L. Signs of spatial neglect in unilateral peripheral vestibulopathy. Eur J Neurol 2021; 28:1779-1783. [PMID: 33369817 DOI: 10.1111/ene.14701] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 12/10/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND PURPOSE In this study, the question of whether egocentric representation of space is impaired in chronic unilateral vestibulopathies was examined. The objective was to test current theories attributing a predominant role to vestibular afferents in spatial cognition and to assess whether representational neglect signs are common in peripheral vestibular loss. METHODS The subjective straight-ahead (SSA) direction was investigated using a horizontal rod allowing the translation and rotation components of the body midline representation to be dissociated in 21 patients with unilateral vestibular loss (right, 13; left, eight) and in 12 healthy controls. RESULTS Compared to the controls, the patients with unilateral vestibulopathy showed a translation bias of their SSA, without rotation bias. The translation bias was not lateralized towards the lesioned side as typically found for biases reported after unilateral vestibular loss. Rather, the SSA bias was rightward whatever the side of the vestibular loss. The translation bias correlated with the vestibular loss, as measured by caloric response and vestibulo-ocular reflex gain, but not with the subjective visual vertical or the residual spontaneous nystagmus. CONCLUSION The present data suggest that the dysfunctions of neural networks involved in egocentred and allocentred representations of space are differentially compensated for in unilateral vestibular defective patients. In particular, they suggest that asymmetrical vestibular inputs to cortical regions lead to representational spatial disturbances as does defective cortical processing of vestibular inputs in spatial neglect after right hemisphere stroke. They also highlight the predominant role of symmetrical and unaltered vestibular inputs in spatial cognition.
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Affiliation(s)
- Arnaud Saj
- Neurology Department, Neuropsychology Unit, University Hospital of Geneva, Geneva, Switzerland.,Department of Psychology, University of Montréal, Montréal, QC, Canada.,CRIR/Institut Nazareth et Louis-Braille du CISSS de la Montérégie-Centre, Longueuil, QC, Canada
| | - Mathilde Bachelard-Serra
- Department of Otorhinolaryngology, Head and Neck Surgery, Hôpital La Conception, APHM, Marseille, France.,Department of Otorhinolaryngology, Head and Neck Surgery, CHP Clairval, Marseille, France
| | - Jean-Pierre Lavieille
- Department of Otorhinolaryngology, Head and Neck Surgery, Hôpital La Conception, APHM, Marseille, France.,Sensory and Cognitive Neurosciences Laboratory, UMR 7260, Aix Marseille Univ, CNRS, FR3C, Case B, Marseille Cedex 03, France
| | | | - Liliane Borel
- Sensory and Cognitive Neurosciences Laboratory, UMR 7260, Aix Marseille Univ, CNRS, FR3C, Case B, Marseille Cedex 03, France
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25
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Anson E, Ehrenburg MR, Simonsick EM, Agrawal Y. Association between vestibular function and rotational spatial orientation perception in older adults. J Vestib Res 2021; 31:469-478. [PMID: 33579887 DOI: 10.3233/ves-201582] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Spatial orientation is a complex process involving vestibular sensory input and possibly cognitive ability. Previous research demonstrated that rotational spatial orientation was worse for individuals with profound bilateral vestibular dysfunction. OBJECTIVE Determine whether rotational and linear vestibular function were independently associated with large amplitude rotational spatial orientation perception in healthy aging. METHODS Tests of rotational spatial orientation accuracy and vestibular function [vestibulo-ocular reflex (VOR), ocular and cervical vestibular evoked myogenic potentials (VEMP)] were administered to 272 healthy community-dwelling adults participating in the Baltimore Longitudinal Study of Aging. Using a mixed model multiple linear regression we regressed spatial orientation errors on lateral semicircular canal function, utricular function (ocular VEMP), and saccular function (cervical VEMP) in a single model controlling for rotation size, age, and sex. RESULTS After adjusting for age, and sex, individuals with bilaterally low VOR gain (β= 20.9, p = 0.014) and those with bilaterally absent utricular function (β= 9.32, p = 0.017) made significantly larger spatial orientation errors relative to individuals with normal vestibular function. CONCLUSIONS The current results demonstrate for the first time that either bilateral lateral semicircular canal dysfunction or bilateral utricular dysfunction are associated with worse rotational spatial orientation. We also demonstrated in a healthy aging cohort that increased age also contributes to spatial orientation ability.
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Affiliation(s)
- E Anson
- Department of Otolaryngology - Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Otolaryngology, University of Rochester, Rochester, NY, USA
| | - M R Ehrenburg
- Department of Otolaryngology - Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - E M Simonsick
- Longitudinal Studies Section, National Institute on Aging, Baltimore, MD, USA
| | - Y Agrawal
- Department of Otolaryngology - Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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26
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The interaction of the visuo-spatial and the vestibular system depends on sensory experience in development. Neuropsychologia 2020; 152:107736. [PMID: 33359642 DOI: 10.1016/j.neuropsychologia.2020.107736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 12/21/2020] [Accepted: 12/21/2020] [Indexed: 11/20/2022]
Abstract
In hearing individuals, vestibular and visuo-spatial functions seem to be functionally linked. Previous studies have suggested that congenitally deaf individuals are at a higher risk for vestibular problems, which in hearing adults have often been found to be associated with impairments in visuo-spatial processing. However, communicating in a sign language provides extensive practice in visuo-spatial processing, which might counteract negative effects of vestibular impairments. Here, we investigated whether the functional link between vestibular and visuo-spatial functions is mandatory, that is whether it is impenetrable to experience or context, or whether it is dependent on specific sensory and cognitive experiences. To this end, we tested a group of congenitally deaf native signers and a group of hearing nonsigners on mental rotation and balance tasks. Compared to hearing nonsigners, mental rotation was superior in the deaf signers in conditions crucial for sign language comprehension. By contrast, the balance performance of the group of deaf signers was impaired. While in the group of hearing nonsigners, balance skills correlated with mental rotation abilities, no such relationship was observed in the group of deaf signers. These results suggest that the link between vestibular and visuo-spatial functions is not fixed but can be altered or even cancelled out by certain sensory or cognitive experiences, such as the acquisition of a sign language.
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27
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Kos N, Brcar M, Velnar T. Functional Gait Assessment scale in the rehabilitation of patients after vestibular tumor surgery in an acute hospital. World J Clin Oncol 2020; 11:945-958. [PMID: 33312888 PMCID: PMC7701913 DOI: 10.5306/wjco.v11.i11.945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 08/30/2020] [Accepted: 09/22/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Patients in the acute phase of rehabilitation after vestibular tumor surgery are dysfunctional in basic daily activities. Balance, gait impairments, and falls are prevalent with vestibular loss.
AIM To determine the degree of balance disorders after vestibular tumor surgery, the susceptibility to falls and to assess motor tasks using the Functional Gait Assessment (FGA) scale for functional gait, as part of the vestibular rehabilitation program during hospital stay.
METHODS Patients who achieved a score higher than 25 points on the Mini-Mental State Examination and higher than 8 points on the Barthel index were included in the study. They were evaluated with the Berg Balance Scale the second day after surgery, during their hospital stay, at discharge, and three months after surgery. Throughout their hospitalization, patients took part in the vestibular rehabilitation program, focusing on multiple motor tasks included in the FGA.
RESULTS All patients progressed clinically and statistically significant differences in functional activities of daily living were observed during hospitalization, before discharge to the home environment (median = 11; P = 0.0059) and three months after vestibular tumor surgery (median = 8; P = 0.0058). After discharge from hospital, four patients were at risk of falls, and two patients were at risk at three months.
CONCLUSION Our study showed a positive effect of the use of FGA tasks as part of a rehabilitation program on functional activities of daily living in patients after vestibular tumor surgery. Nevertheless, we suggest further research to include a larger sample and a control group to overcome the deficiencies of our study.
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Affiliation(s)
- Natasa Kos
- Department of Medical Rehabilitation, University Medical Centre Ljubljana, Ljubljana 1000, Slovenia
| | - Marusa Brcar
- Department of Medical Rehabilitation, University Medical Centre Ljubljana, Ljubljana 1000, Slovenia
| | - Tomaz Velnar
- Department of Neurosurgery, University Medical Centre Ljubljana, Ljubljana 1000, Slovenia
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28
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The effects of neck muscle vibration on postural orientation and spatial perception: A systematic review. Neurophysiol Clin 2020; 50:227-267. [DOI: 10.1016/j.neucli.2019.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 10/06/2019] [Accepted: 10/06/2019] [Indexed: 11/17/2022] Open
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29
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Rastoldo G, Marouane E, El Mahmoudi N, Péricat D, Bourdet A, Timon-David E, Dumas O, Chabbert C, Tighilet B. Quantitative Evaluation of a New Posturo-Locomotor Phenotype in a Rodent Model of Acute Unilateral Vestibulopathy. Front Neurol 2020; 11:505. [PMID: 32582016 PMCID: PMC7291375 DOI: 10.3389/fneur.2020.00505] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/07/2020] [Indexed: 12/19/2022] Open
Abstract
Vestibular pathologies are difficult to diagnose. Existing devices make it possible to quantify and follow the evolution of posturo-locomotor symptoms following vestibular loss in static conditions. However, today, there are no diagnostic tools allowing the quantitative and spontaneous analysis of these symptoms in dynamic situations. With this in mind, we used an open-field video tracking test aiming at identifying specific posturo-locomotor markers in a rodent model of vestibular pathology. Using Ethovision XT 14 software (Noldus), we identified and quantified several behavioral parameters typical of unilateral vestibular lesions in a rat model of vestibular pathology. The unilateral vestibular neurectomy (UVN) rat model reproduces the symptoms of acute unilateral peripheral vestibulopathy in humans. Our data show deficits in locomotion velocity, distance traveled and animal mobility in the first day after the injury. We also highlighted alterations in several parameters, such as head and body acceleration, locomotor pattern, and position of the body, as well as “circling” behavior after vestibular loss. Here, we provide an enriched posturo-locomotor phenotype specific to full and irreversible unilateral vestibular loss. This test helps to strengthen the quantitative evaluation of vestibular disorders in unilateral vestibular lesion rat model. It may also be useful for testing pharmacological compounds promoting the restoration of balance. Transfer of these novel evaluation parameters to human pathology may improve the diagnosis of acute unilateral vestibulopathies and could better follow the evolution of the symptoms upon pharmacological and physical rehabilitation.
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Affiliation(s)
- Guillaume Rastoldo
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Sensorielles et Cognitives, LNSC UMR 7260, Equipe Physiopathologie et Thérapie des Désordres Vestibulaires, Groupe de Recherche Vertige (GDR#2074), Marseille, France
| | - Emna Marouane
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Sensorielles et Cognitives, LNSC UMR 7260, Equipe Physiopathologie et Thérapie des Désordres Vestibulaires, Groupe de Recherche Vertige (GDR#2074), Marseille, France
| | - Nada El Mahmoudi
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Sensorielles et Cognitives, LNSC UMR 7260, Equipe Physiopathologie et Thérapie des Désordres Vestibulaires, Groupe de Recherche Vertige (GDR#2074), Marseille, France
| | - David Péricat
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Sensorielles et Cognitives, LNSC UMR 7260, Equipe Physiopathologie et Thérapie des Désordres Vestibulaires, Groupe de Recherche Vertige (GDR#2074), Marseille, France
| | - Audrey Bourdet
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Sensorielles et Cognitives, LNSC UMR 7260, Equipe Physiopathologie et Thérapie des Désordres Vestibulaires, Groupe de Recherche Vertige (GDR#2074), Marseille, France
| | - Elise Timon-David
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Sensorielles et Cognitives, LNSC UMR 7260, Equipe Physiopathologie et Thérapie des Désordres Vestibulaires, Groupe de Recherche Vertige (GDR#2074), Marseille, France
| | - Olivier Dumas
- Société Française de Kinésithérapie Vestibulaire, Lyon, France
| | - Christian Chabbert
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Sensorielles et Cognitives, LNSC UMR 7260, Equipe Physiopathologie et Thérapie des Désordres Vestibulaires, Groupe de Recherche Vertige (GDR#2074), Marseille, France
| | - Brahim Tighilet
- Aix Marseille Université-CNRS, Laboratoire de Neurosciences Sensorielles et Cognitives, LNSC UMR 7260, Equipe Physiopathologie et Thérapie des Désordres Vestibulaires, Groupe de Recherche Vertige (GDR#2074), Marseille, France
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30
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Stahn AC, Riemer M, Wolbers T, Werner A, Brauns K, Besnard S, Denise P, Kühn S, Gunga HC. Spatial Updating Depends on Gravity. Front Neural Circuits 2020; 14:20. [PMID: 32581724 PMCID: PMC7291770 DOI: 10.3389/fncir.2020.00020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 04/09/2020] [Indexed: 12/13/2022] Open
Abstract
As we move through an environment the positions of surrounding objects relative to our body constantly change. Maintaining orientation requires spatial updating, the continuous monitoring of self-motion cues to update external locations. This ability critically depends on the integration of visual, proprioceptive, kinesthetic, and vestibular information. During weightlessness gravity no longer acts as an essential reference, creating a discrepancy between vestibular, visual and sensorimotor signals. Here, we explore the effects of repeated bouts of microgravity and hypergravity on spatial updating performance during parabolic flight. Ten healthy participants (four women, six men) took part in a parabolic flight campaign that comprised a total of 31 parabolas. Each parabola created about 20–25 s of 0 g, preceded and followed by about 20 s of hypergravity (1.8 g). Participants performed a visual-spatial updating task in seated position during 15 parabolas. The task included two updating conditions simulating virtual forward movements of different lengths (short and long), and a static condition with no movement that served as a control condition. Two trials were performed during each phase of the parabola, i.e., at 1 g before the start of the parabola, at 1.8 g during the acceleration phase of the parabola, and during 0 g. Our data demonstrate that 0 g and 1.8 g impaired pointing performance for long updating trials as indicated by increased variability of pointing errors compared to 1 g. In contrast, we found no support for any changes for short updating and static conditions, suggesting that a certain degree of task complexity is required to affect pointing errors. These findings are important for operational requirements during spaceflight because spatial updating is pivotal for navigation when vision is poor or unreliable and objects go out of sight, for example during extravehicular activities in space or the exploration of unfamiliar environments. Future studies should compare the effects on spatial updating during seated and free-floating conditions, and determine at which g-threshold decrements in spatial updating performance emerge.
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Affiliation(s)
- Alexander Christoph Stahn
- Department of Psychiatry, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, United States.,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Physiology, Berlin, Germany
| | - Martin Riemer
- Aging and Cognition Research Group, German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Thomas Wolbers
- Aging and Cognition Research Group, German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Anika Werner
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Physiology, Berlin, Germany.,Normandie Université, UNICAEN, INSERM, COMETE, Caen, France
| | - Katharina Brauns
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Physiology, Berlin, Germany
| | | | - Pierre Denise
- Normandie Université, UNICAEN, INSERM, COMETE, Caen, France
| | - Simone Kühn
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Lise Meitner Group for Environmental Neuroscience, Max Planck Institute for Human Development, Berlin, Germany
| | - Hanns-Christian Gunga
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Physiology, Berlin, Germany
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31
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Bergmann J, Bardins S, Prawitz C, Keywan A, MacNeilage P, Jahn K. Perception of postural verticality in roll and pitch while sitting and standing in healthy subjects. Neurosci Lett 2020; 730:135055. [DOI: 10.1016/j.neulet.2020.135055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/11/2020] [Accepted: 05/13/2020] [Indexed: 10/24/2022]
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32
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Gamba P, Guidetti R, Guidetti G. Navigation Ability Test: a new specific test to asses spatial orientation ability in football players and healthy subjects. J Sports Med Phys Fitness 2020; 60:934-941. [PMID: 32037781 DOI: 10.23736/s0022-4707.20.10110-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND This paper describes a new specific test to asses spatial and orientation abilities: Navigation Ability Test (NAT). The goal of this study was to determine if football players and normal subjects use vestibular information to keep track of their positions while walking through the Navigation Ability Test. METHODS This study was conducted on a total of 120 patients undergoing Navigation Ability Test (NAT): 60 football players and 60 normal subjects were recruited on the basis of no history of vertigo/balance disorders and a negative otoneurological instrumental examination and the second group of the football players were recruited from Division B, Division Under-21 and Women's League. Patients who met the inclusion criteria were enrolled in the study. RESULTS Our results showed differences between sexes during navigation tasks are not related to spatial learning per se, but appear to be the consequence of difference in ability to effectively use specific types of distal information such as room geometry. The NAT showed that the route-times walked with eyes closed are always longer than in normal people and mistakes improve with training. CONCLUSIONS These results show that NAT could suggest to the coach and trainers valuable information about the characteristics of the players and how they should play in the field. Although there are some intrinsic difficulties, for example in creating patient-specific versions of the test, preliminary normative data indicate that this original test is workable and provides important information in therapy rehabilitation for vestibular disorder.
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Affiliation(s)
- Paolo Gamba
- Department of Otorhinolaryngology, Head and Neck Surgery, LAB of Clinical and Instrumental Vestibology, Poliambulanza Foundation Hospital, Brescia, Italy -
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33
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Nakamura J, Shiozaki T, Tsujimoto N, Ikuno K, Okada Y, Shomoto K. Role of somatosensory and/or vestibular sensory information in subjective postural vertical in healthy adults. Neurosci Lett 2020; 714:134598. [DOI: 10.1016/j.neulet.2019.134598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 10/10/2019] [Accepted: 10/28/2019] [Indexed: 10/25/2022]
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34
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Anson ER, Ehrenburg MR, Wei EX, Bakar D, Simonsick E, Agrawal Y. Saccular function is associated with both angular and distance errors on the triangle completion test. Clin Neurophysiol 2019; 130:2137-2143. [PMID: 31569041 PMCID: PMC6874399 DOI: 10.1016/j.clinph.2019.08.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 08/22/2019] [Accepted: 08/24/2019] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The present study was designed to determine whether healthy older adults with age-related vestibular loss have deficits in spatial navigation. METHODS 154 adults participating in the Baltimore Longitudinal Study of Aging were tested for semicircular canal, saccular, and utricular function and spatial navigation ability using the blindfolded Triangle Completion Test (TCT). Multiple linear regression was used to investigate the relationships between each measure of vestibular function and performance on the TCT (angular error, end point error, and distance walked) while controlling for age and sex. RESULTS Individuals with abnormal saccular function made larger angular errors (β = 4.2°, p < 0.05) and larger end point errors (β = 13.6 cm, p < 0.05). Independent of vestibular function, older age was associated with larger angular (β's = 2.2-2.8°, p's < 0.005) and end point errors (β's = 7.5-9.0 cm, p's < 0.005) for each decade increment in age. CONCLUSIONS Saccular function appears to play a prominent role in accurate spatial navigation during a blindfolded navigation task. SIGNIFICANCE We hypothesize that gravitational cues detected by the saccule may be integrated into estimation of place as well as heading direction.
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Affiliation(s)
- E R Anson
- Department of Otolaryngology - Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Otolaryngology, University of Rochester, Rochester, NY, USA.
| | - M R Ehrenburg
- Department of Otolaryngology - Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - E X Wei
- Department of Otolaryngology - Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - D Bakar
- Department of Otolaryngology - Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA; School of Medicine, Brown University, Providence, RI, USA
| | - E Simonsick
- Longitudinal Studies Section, National Institute on Aging, Baltimore, MD, USA
| | - Y Agrawal
- Department of Otolaryngology - Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Piątek E, Kuczyński M, Ostrowska B. Postural control in girls with adolescent idiopathic scoliosis while wearing a Chêneau brace or performing active self-correction: a pilot study. PeerJ 2019; 7:e7513. [PMID: 31528504 PMCID: PMC6717654 DOI: 10.7717/peerj.7513] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 07/18/2019] [Indexed: 01/11/2023] Open
Abstract
Background It is known that adolescent idiopathic scoliosis (AIS) is often accompanied by balance deficits. This reciprocal relationship must be taken into account when prescribing new therapeutic modalities because these may differently affect postural control, interacting with therapy and influencing its results. Objective The purpose was to compare postural control in girls with AIS while wearing the Chêneau brace (BRA) or performing active self-correction (ASC) with their postural control in a quiet comfortable stance. Methods Nine subjects were evaluated on a force plate in three series of two 20-s quiet standing trials with eyes open or closed; three blocks were randomly arranged: normal quiet stance (QST), quiet stance with BRA, and quiet stance with ASC. On the basis of centre-of-pressure (COP) recordings, the spatial and temporal COP parameters were computed. Results and Discussion Performing ASC was associated with a significant backward excursion of the COP mean position with eyes open and closed (ES = 0.56 and 0.65, respectively; p < 0.05). This excursion was accompanied by an increase in the COP fractal dimension (ES = 1.05 and 0.98; p < 0.05) and frequency (ES = 0.78; p = 0.10 and ES = 1.14; p < 0.05) in the mediolateral (ML) plane. Finally, both therapeutic modalities decreased COP sample entropy with eyes closed in the anteroposterior (AP) plane. Wearing BRA resulted in ES = 1.45 (p < 0.05) while performing ASC in ES = 0.76 (p = 0.13). Conclusion The observed changes in the fractal dimension (complexity) and frequency caused by ASC account for better adaptability of patients to environmental demands and for their adequate resources of available postural strategies in the ML plane. These changes in sway structure were accompanied by a significant (around 25 mm) backward excursion of the mean COP position. However, this improvement was achieved at the cost of lower automaticity, i.e. higher attentional involvement in postural control in the AP plane. Wearing BRA may have an undesirable effect on some aspects of body balance.
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Affiliation(s)
- Elżbieta Piątek
- Faculty of Physiotherapy, University School of Physical Education in Wroclaw, Wrocław, Poland
| | - Michał Kuczyński
- Faculty of Physical Education and Physiotherapy, Opole University of Technology, Opole, Poland
| | - Bożena Ostrowska
- Faculty of Physiotherapy, University School of Physical Education in Wroclaw, Wrocław, Poland
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Caldani S, Bucci MP, Tisné M, Audo I, Van Den Abbeele T, Wiener-Vacher S. Postural Instability in Subjects With Usher Syndrome. Front Neurol 2019; 10:830. [PMID: 31440199 PMCID: PMC6694594 DOI: 10.3389/fneur.2019.00830] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 07/18/2019] [Indexed: 11/14/2022] Open
Abstract
This study investigated postural performances and vestibular impairment in Usher patients. The three groups studied were: 11 patients with Usher type I (with visual and vestibular impairment), 14 patients with Usher type II (with only visual impairment), and 14 healthy control subjects. Postural stability was measured with a Framiral Multitest Equilibre platform with three visual conditions: eyes open (EO), eyes closed (EC), and vision disturbed by optokinetic stimulation (OPT), and two different postural conditions: stable or unstable platform. The surface and mean velocity of the center of pressure displacement (CoP) were measured and a postural instability index (PII) was calculated. Usher type I and II patients were more unstable than control subjects, but only for the unstable platform. Patients with Usher type I (with severe vestibular impairment) were also significantly more unstable than patients with Usher type II (with normal vestibular function) on the unstable platform. The severity of the vestibular impairment was correlated with the surface of the CoP displacement. We suggest that poor postural control of Usher patients is due to the abnormalities in their visual and, when defective, vestibular inputs. Measurements of postural stability on an unstable platform can distinguish type I from type II Usher patients. We emphasize the importance of multisensory evaluation in these patients to guide development of personalized visuo-vestibular rehabilitation techniques to improve their postural stability and improve their quality of life.
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Affiliation(s)
- Simona Caldani
- UMR 1141 Inserm, Robert Debré Hospital, Université de Paris, Paris, France.,FEE, ENT Department, Center for Children Balance Disorders Evaluation, Robert Debré Hospital, Paris, France
| | - Maria Pia Bucci
- UMR 1141 Inserm, Robert Debré Hospital, Université de Paris, Paris, France.,FEE, ENT Department, Center for Children Balance Disorders Evaluation, Robert Debré Hospital, Paris, France
| | - Maud Tisné
- UMR 1141 Inserm, Robert Debré Hospital, Université de Paris, Paris, France.,FEE, ENT Department, Center for Children Balance Disorders Evaluation, Robert Debré Hospital, Paris, France
| | - Isabelle Audo
- CHNO des Quinze-Vingts, DHU Sight Restore, INSERM-DHOS, Paris, France
| | - Thierry Van Den Abbeele
- FEE, ENT Department, Center for Children Balance Disorders Evaluation, Robert Debré Hospital, Paris, France
| | - Sylvette Wiener-Vacher
- UMR 1141 Inserm, Robert Debré Hospital, Université de Paris, Paris, France.,FEE, ENT Department, Center for Children Balance Disorders Evaluation, Robert Debré Hospital, Paris, France
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Saj A, Borel L, Honoré J. Functional Neuroanatomy of Vertical Visual Perception in Humans. Front Neurol 2019; 10:142. [PMID: 30863358 PMCID: PMC6400097 DOI: 10.3389/fneur.2019.00142] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 02/04/2019] [Indexed: 11/13/2022] Open
Abstract
Vertical representation is central to posture control, as well as to spatial perception and navigation. This representation has been studied for a long time in patients with vestibular disorders and more recently in patients with hemispheric damage, in particular in those with right lesions causing spatial or postural deficits. The aim of the study was to determine the brain areas involved in the visual perception of the vertical. Sixteen right-handed healthy participants were evaluated using fMRI while they were judging the verticality of lines or, in a control task, the color of the same lines. The brain bases of the vertical perception proved to involve a bilateral temporo-occipital and parieto-occipital cortical network, with a right dominance tendency, associated with cerebellar and brainstem areas. Consistent with the outcomes of neuroanatomical studies in stroke patients, The data of this original fMRI study in healthy subjects provides new insights into brain networks associated with vertical perception which is typically impaired in both vestibular and spatial neglect patients. Interestingly, these networks include not only brain areas associated with postural control but also areas implied in body representation.
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Affiliation(s)
- Arnaud Saj
- Neuropsychology Unit, Neurology Department, University Hospital of Geneva, Geneva, Switzerland.,Neurology and Cognitive Imaging Laboratory, Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Psychology Department, University of Montréal, Montréal, QC, Canada
| | - Liliane Borel
- CNRS, LNSC, Aix-Marseille University, Marseille, France
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Hilber P, Cendelin J, Le Gall A, Machado ML, Tuma J, Besnard S. Cooperation of the vestibular and cerebellar networks in anxiety disorders and depression. Prog Neuropsychopharmacol Biol Psychiatry 2019; 89:310-321. [PMID: 30292730 DOI: 10.1016/j.pnpbp.2018.10.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 09/25/2018] [Accepted: 10/04/2018] [Indexed: 12/28/2022]
Abstract
The discipline of affective neuroscience is concerned with the neural bases of emotion and mood. The past decades have witnessed an explosion of research in affective neuroscience, increasing our knowledge of the brain areas involved in fear and anxiety. Besides the brain areas that are classically associated with emotional reactivity, accumulating evidence indicates that both the vestibular and cerebellar systems are involved not only in motor coordination but also influence both cognition and emotional regulation in humans and animal models. The cerebellar and the vestibular systems show the reciprocal connection with a myriad of anxiety and fear brain areas. Perception anticipation and action are also major centers of interest in cognitive neurosciences. The cerebellum is crucial for the development of an internal model of action and the vestibular system is relevant for perception, gravity-related balance, navigation and motor decision-making. Furthermore, there are close relationships between these two systems. With regard to the cooperation between the vestibular and cerebellar systems for the elaboration and the coordination of emotional cognitive and visceral responses, we propose that altering the function of one of the systems could provoke internal model disturbances and, as a result, anxiety disorders followed potentially with depressive states.
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Affiliation(s)
- Pascal Hilber
- Centre de Recherche sur les Fonctionnements et Dysfonctionnements Psychologigues, CRFDP EA 7475, Rouen Normandie University, Bat Blondel, Place E. Blondel 76821, Mont Saint Aignan cedex, France.
| | - Jan Cendelin
- Department of Pathophysiology, Faculty of Medicine in Pilsen, Charles University, alej Svobody 1655/76, 323 00 Plzen, Czech Republic; Laboratory of Neurodegenerative Disorders, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, alej Svobody 1655/76, 323 00 Plzen, Czech Republic
| | - Anne Le Gall
- UMR UCBN/INSERM U 1075 COMETE, Pole des Formations et de Recherche en Sante, Normandie University, 2 Rue Rochambelles, 14032 Caen, cedex 5, France
| | - Marie-Laure Machado
- UMR UCBN/INSERM U 1075 COMETE, Pole des Formations et de Recherche en Sante, Normandie University, 2 Rue Rochambelles, 14032 Caen, cedex 5, France
| | - Jan Tuma
- Department of Pathophysiology, Faculty of Medicine in Pilsen, Charles University, alej Svobody 1655/76, 323 00 Plzen, Czech Republic; Laboratory of Neurodegenerative Disorders, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, alej Svobody 1655/76, 323 00 Plzen, Czech Republic
| | - Stephane Besnard
- UMR UCBN/INSERM U 1075 COMETE, Pole des Formations et de Recherche en Sante, Normandie University, 2 Rue Rochambelles, 14032 Caen, cedex 5, France
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Luo Y, Zhang D, Chen Y, Cao Z, Fan Z. Dexamethasone protects against arsanilic acid‑induced rat vestibular dysfunction through the BDNF and JNK 1/2 signaling pathways. Mol Med Rep 2019; 19:1781-1790. [PMID: 30628712 DOI: 10.3892/mmr.2019.9835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 11/12/2018] [Indexed: 11/05/2022] Open
Abstract
The brain‑derived neurotrophic factor (BDNF) and c‑Jun NH 2‑terminal kinase (JNK) signaling pathways are therapeutic targets to prevent degeneration in the central nervous system. Dexamethasone (DXMS), a glucocorticoid, protects against vestibular brain injury, however, the molecular mechanisms have yet to be fully elucidated. To investigate whether the BDNF and JNK signaling pathways are involved in the protective effects of DXMS in rats with vestibular dysfunction, a rat model of severe vestibular deficits was established by middle ear injection of arsanilic acid (AA; 100 mg/ml; 0.05 ml). After 3 days, rat symptoms and behavior scores with vestibular disorders were detected. In brain tissues, histopathological alterations, cell apoptosis, expression levels and patterns of BDNF signaling pathway‑associated BDNF, tyrosine receptor kinase B (TrKB) and K+/Cl‑ cotransporter isoform 2 (KCC2), and the expression of apoptosis‑related cleaved‑caspase 3 and the JNK signaling pathway were detected. It was identified that DXMS relieved AA‑induced vestibular dysfunction, leading to improvement in rat behavior scores to normal levels, minimizing brain damage at the histopatholojnnkngical level, reducing cell apoptosis, enhancing the expression of BDNF, TrKB and KCC2, and downregulating cleaved‑caspase 3 and phosphorylated‑JNK1/2 in brain tissues. Together, these findings indicated the protective effect of DXMS on AA‑induced rat vestibular dysfunction, and that activating BDNF and inhibiting JNK singling pathways were the underlying mechanisms. In addition, with additional treatment of mifepristone (RU486), a specific glucocorticoid agonist, all the events elicited by DXMS mentioned above in the AA‑treated rat rats were reversed. In conclusion, DXMS was identified as a therapeutic agent targeting the BDNF and JNK singling pathways for AA‑induced rat vestibular dysfunction.
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Affiliation(s)
- Yan Luo
- Department of Otolaryngology‑Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Daogong Zhang
- Department of Otolaryngology‑Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Yueling Chen
- Department of Otolaryngology‑Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Zhongsheng Cao
- Department of Otolaryngology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Zhaomin Fan
- Department of Otolaryngology‑Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
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Paya-Argoud M, Tardieu C, Cheynet F, Raskin A, Borel L. Impact of orthognathic surgery on the body posture. Gait Posture 2019; 67:25-30. [PMID: 30261320 DOI: 10.1016/j.gaitpost.2018.09.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 09/11/2018] [Accepted: 09/19/2018] [Indexed: 02/02/2023]
Abstract
BACKGROUND Postural control is classically described as being based on the visual, vestibular, and proprioceptive musculo-articular sensory systems. The influence of mandibular proprioception on postural stabilization remains controversial. Most previous studies analyzed how postural stability is influenced by partial changes in mandibular proprioception (dental occlusion and jaw position). RESEARCH QUESTION In the present experiment, we asked whether drastic mandibular changes, resulting from orthognathic surgery (including dental, joint and muscular efferents), modify postural control. METHODS The analyzes were performed in 22 patients tested before, and 2.5 months, after orthognathic surgery for treatment of dysmorphic jaws. Experiments were performed under 4 experimental conditions: 2 visual conditions: Eyes Open (EO) and Eyes Closed (EC), and 2 occlusal conditions: Occlusion (OC: mandible positioned by the contact of the teeth), and Rest Position (RP: mandible positioned by the muscles without tooth contact). The analyses focused on head orientation in the frontal plane and on postural stabilization in a static task, consisting of standing upright. RESULTS The results show that, 2.5 months after orthognathic surgery, head orientation in the frontal plane was improved, since patient's external intercanthal lines became closer to the true horizontal line when they were tested EC and in OC condition. Postural responses, based on the wavelet transformation data, highlight an improvement in maintaining an upright stance for all the tested sensory conditions. However, such improvement was greater in the EC and RP conditions. SIGNIFICANCE These results show, for the first time, that after drastic mandibular changes, the weight of proprioceptive cues linked to the mandibular system may be so enhanced that it may constitute a new reference frame to orient the head in space, in darkness, and improve static postural stabilization, even in the presence of visual cues.
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Affiliation(s)
- M Paya-Argoud
- Aix Marseille Univ, CNRS, EFS, ADES, Faculté de Médecine, Bâtiment A, Boulevard Pierre Dramard, 13344, Marseille, France.
| | - C Tardieu
- Aix Marseille Univ, CNRS, EFS, ADES, Faculté de Médecine, Bâtiment A, Boulevard Pierre Dramard, 13344, Marseille, France; Assistance Publique Hopitaux de Marseille, pôle d'Odontologie, Hôpital de la Timone, 264 rue Saint Pierre, 13005, Marseille, France.
| | - F Cheynet
- Assistance Publique Hopitaux de Marseille, service de Chirurgie Maxillo-faciale, Hopital de la Conception, 147 Boulevard Baille, 13005, Marseille, France.
| | - A Raskin
- Aix Marseille Univ, CNRS, EFS, ADES, Faculté de Médecine, Bâtiment A, Boulevard Pierre Dramard, 13344, Marseille, France; Assistance Publique Hopitaux de Marseille, pôle d'Odontologie, Hôpital de la Timone, 264 rue Saint Pierre, 13005, Marseille, France.
| | - L Borel
- Aix Marseille Univ, CNRS, LNSC, Marseille, France.
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Ellis AW, Schöne CG, Vibert D, Caversaccio MD, Mast FW. Cognitive Rehabilitation in Bilateral Vestibular Patients: A Computational Perspective. Front Neurol 2018; 9:286. [PMID: 29755404 PMCID: PMC5934854 DOI: 10.3389/fneur.2018.00286] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 04/13/2018] [Indexed: 01/27/2023] Open
Abstract
There is evidence that vestibular sensory processing affects, and is affected by, higher cognitive processes. This is highly relevant from a clinical perspective, where there is evidence for cognitive impairments in patients with peripheral vestibular deficits. The vestibular system performs complex probabilistic computations, and we claim that understanding these is important for investigating interactions between vestibular processing and cognition. Furthermore, this will aid our understanding of patients’ self-motion perception and will provide useful information for clinical interventions. We propose that cognitive training is a promising way to alleviate the debilitating symptoms of patients with complete bilateral vestibular loss (BVP), who often fail to show improvement when relying solely on conventional treatment methods. We present a probabilistic model capable of processing vestibular sensory data during both passive and active self-motion. Crucially, in our model, knowledge from multiple sources, including higher-level cognition, can be used to predict head motion. This is the entry point for cognitive interventions. Despite the loss of sensory input, the processing circuitry in BVP patients is still intact, and they can still perceive self-motion when the movement is self-generated. We provide computer simulations illustrating self-motion perception of BVP patients. Cognitive training may lead to more accurate and confident predictions, which result in decreased weighting of sensory input, and thus improved self-motion perception. Using our model, we show the possible impact of cognitive interventions to help vestibular rehabilitation in patients with BVP.
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Affiliation(s)
- Andrew W Ellis
- Department of Psychology, University of Bern, Bern, Switzerland.,Center for Cognition, Learning and Memory, University of Bern, Bern, Switzerland
| | - Corina G Schöne
- Department of Psychology, University of Bern, Bern, Switzerland.,Center for Cognition, Learning and Memory, University of Bern, Bern, Switzerland.,Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Dominique Vibert
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Marco D Caversaccio
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Fred W Mast
- Department of Psychology, University of Bern, Bern, Switzerland.,Center for Cognition, Learning and Memory, University of Bern, Bern, Switzerland
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An Overview of the Physiology and Pathophysiology of Postural Control. BIOSYSTEMS & BIOROBOTICS 2018. [DOI: 10.1007/978-3-319-72736-3_1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Moser I, Vibert D, Caversaccio MD, Mast FW. Impaired math achievement in patients with acute vestibular neuritis. Neuropsychologia 2017; 107:1-8. [PMID: 29107735 DOI: 10.1016/j.neuropsychologia.2017.10.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 10/12/2017] [Accepted: 10/27/2017] [Indexed: 10/18/2022]
Abstract
Broad cognitive difficulties have been reported in patients with peripheral vestibular deficit, especially in the domain of spatial cognition. Processing and manipulating numbers relies on the ability to use the inherent spatial features of numbers. It is thus conceivable that patients with acute peripheral vestibular deficit show impaired numerical cognition. Using the number Stroop task and a short math achievement test, we tested 20 patients with acute vestibular neuritis and 20 healthy, age-matched controls. On the one hand, patients showed normal congruency and distance effects in the number Stroop task, which is indicative of normal number magnitude processing. On the other hand, patients scored lower than healthy controls in the math achievement test. We provide evidence that the lower performance cannot be explained by either differences in prior math knowledge (i.e., education) or slower processing speed. Our results suggest that peripheral vestibular deficit negatively affects numerical cognition in terms of the efficient manipulation of numbers. We discuss the role of executive functions in math performance and argue that previously reported executive deficits in patients with peripheral vestibular deficit provide a plausible explanation for the lower math achievement scores. In light of the handicapping effects of impaired numerical cognition in daily living, it is crucial to further investigate the mechanisms that cause mathematical deficits in acute PVD and eventually develop adequate means for cognitive interventions.
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Affiliation(s)
- Ivan Moser
- Department of Psychology, University of Bern, Fabrikstrasse 8, 3012 Bern, Switzerland; Center for Cognition, Learning and Memory, University of Bern, Fabrikstrasse 8, 3012 Bern, Switzerland.
| | - Dominique Vibert
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, University of Bern, Bern, Switzerland
| | - Marco D Caversaccio
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, University of Bern, Bern, Switzerland
| | - Fred W Mast
- Department of Psychology, University of Bern, Fabrikstrasse 8, 3012 Bern, Switzerland; Center for Cognition, Learning and Memory, University of Bern, Fabrikstrasse 8, 3012 Bern, Switzerland
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Allum JHJ, Langewitz W, Sleptsova M, Welge-Luessen A, Honegger F, Schatz TH, Biner CL, Maguire C, Schmid DA. Mental body transformation deficits in patients with chronic balance disorders. J Vestib Res 2017; 27:113-125. [PMID: 29064827 DOI: 10.3233/ves-170613] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Movements may be generated consistent with imagining one's own body transformed or "disembodied" to a new position. Based on this concept we hypothesized that patients with objective balance deficits (obj-BD) would have altered neural transformation processes executing own body transformation (OBT) with functional consequences on balance control. Also we examined whether feeling unstable due to dizziness only (DO), without an obj-BD, also lead to an impaired OBT. METHODS 32 patients with chronic dizziness were tested: 16 patients with obj-BD as determined by balance control during a sequence of stance and gait tasks, 16 patients with dizziness only (DO). Patients and 9 healthy controls (HCs) were asked to replicate roll trunk movements of an instructor in a life size video: first, with spontaneously copied (SPO) or "embodied" egocentric movements (lean when the instructor leans); second, with "disembodied" or "transformed" movements (OBT) with exact replication - lean left when the instructor leans left. Onset latency of trunk roll, rise time to peak roll angle (interval), roll velocity, and amplitude were measured. RESULTS SPO movements were always mirror-imaged. OBT task latencies were significantly longer and intervals shorter than for SPO tasks (p < 0.03) for all groups. Obj-BD but not DO patients had more errors for the OBT task and, compared to HCs, had longer onset latencies (p < 0.05) and smaller velocities (p < 0.003) and amplitudes (p < 0.001) in both the SPO and OBT tasks. Measures of DO patients were not significantly different from those of HCs. CONCLUSIONS Mental transformation (OBT) and SPO copying abilities are impaired in subjects with obj-BD and dizziness, but not with dizziness only. We conclude that processing the neuropsychological representation of the human body (body schema) slows when balance control is deficient.
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Affiliation(s)
- J H J Allum
- Department of Psychosomatic Medicine and University of Basel Hospital, Basel, Switzerland.,Department of ORL, University of Basel Hospital, Basel, Switzerland
| | - W Langewitz
- Department of Psychosomatic Medicine and University of Basel Hospital, Basel, Switzerland
| | - M Sleptsova
- Department of Psychosomatic Medicine and University of Basel Hospital, Basel, Switzerland
| | - A Welge-Luessen
- Department of ORL, University of Basel Hospital, Basel, Switzerland
| | - F Honegger
- Department of ORL, University of Basel Hospital, Basel, Switzerland
| | - T H Schatz
- Health Sciences Teaching Centre Basel, Switzerland
| | - C L Biner
- Health Sciences Teaching Centre Basel, Switzerland
| | - C Maguire
- Health Sciences Teaching Centre Basel, Switzerland
| | - D A Schmid
- Department of Psychosomatic Medicine and University of Basel Hospital, Basel, Switzerland.,Department of ORL, University of Basel Hospital, Basel, Switzerland
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Lee KH, Baksh A, Bryant A, McGowan M, McMillan R, Chong RK. Two Mechanisms of Sensorimotor Set Adaptation to Inclined Stance. Front Hum Neurosci 2017; 11:480. [PMID: 29109683 PMCID: PMC5660095 DOI: 10.3389/fnhum.2017.00480] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 09/19/2017] [Indexed: 12/05/2022] Open
Abstract
Orientation of posture relative to the environment depends on the contributions from the somatosensory, vestibular, and visual systems mixed in varying proportions to produce a sensorimotor set. Here, we probed the sensorimotor set composition using a postural adaptation task in which healthy adults stood on an inclined surface for 3 min. Upon returning to a horizontal surface, participants displayed a range of postural orientations – from an aftereffect that consisted of a large forward postural lean to an upright stance with little or no aftereffect. It has been hypothesized that the post-incline postural change depends on each individual’s sensorimotor set: whether the set was dominated by the somatosensory or vestibular system: Somatosensory dominance would cause the lean aftereffect whereas vestibular dominance should steer stance posture toward upright orientation. We investigated the individuals who displayed somatosensory dominance by manipulating their attention to spatial orientation. We introduced a distraction condition in which subjects concurrently performed a difficult arithmetic subtraction task. This manipulation altered the time course of their post-incline aftereffect. When not distracted, participants returned to upright stance within the 3-min period. However, they continued leaning forward when distracted. These results suggest that the mechanism of sensorimotor set adaptation to inclined stance comprises at least two components. The first component reflects the dominant contribution from the somatosensory system. Since the postural lean was observed among these subjects even when they were not distracted, it suggests that the aftereffect is difficult to overcome. The second component includes a covert attentional component which manifests as the dissipation of the aftereffect and the return of posture to upright orientation.
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Affiliation(s)
- Kyoung-Hyun Lee
- Center for Sport Science in Gwangju, Gwangju Sports Council, Gwangju, South Korea
| | - Asheeba Baksh
- Department of Physical Therapy, Augusta University, Augusta, GA, United States
| | - Alyssa Bryant
- Department of Physical Therapy, Augusta University, Augusta, GA, United States
| | - Mollie McGowan
- Department of Physical Therapy, Augusta University, Augusta, GA, United States
| | - Ryan McMillan
- Department of Physical Therapy, Augusta University, Augusta, GA, United States
| | - Raymond K Chong
- Department of Physical Therapy, Augusta University, Augusta, GA, United States
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Cassel R, Bordiga P, Pericat D, Hautefort C, Tighilet B, Chabbert C. New mouse model for inducing and evaluating unilateral vestibular deafferentation syndrome. J Neurosci Methods 2017; 293:128-135. [PMID: 28911857 DOI: 10.1016/j.jneumeth.2017.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/06/2017] [Accepted: 09/11/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND Unilateral vestibular deafferentation syndrome (uVDS) holds a particular place in the vestibular pathology domain. Due to its suddenness, the violence of its symptoms that often result in emergency hospitalization, and its associated original neurophysiological properties, this syndrome is a major source of questioning for the otoneurology community. Also, its putative pathogenic causes remain to be determined. There is currently a strong medical need for the development of targeted and effective countermeasures to improve the therapeutic management of uVDS. NEW METHODS The present study reports the development of a new mouse model for inducing and evaluating uVDS. Both the method for generating controlled excitotoxic-type peripheral vestibular damages, through transtympanic administration of the glutamate receptors agonist kainate (TTK), and the procedure for evaluating the ensuing clinical signs are detailed. COMPARISON WITH EXISTING METHODS Through extensive analysis of the clinical symptoms characteristics, this new animal model provides the opportunity to better follow the temporal evolution of various uVDS specific symptoms, while better appreciating the different phases that composed this syndrome. RESULTS The uVDS evoked in the TTK mouse model displays two main phases distinguishable by their kinetics and amplitudes. Several parameters of the altered vestibular behaviour mimic those observed in the human syndrome. CONCLUSION This new murine model brings concrete information about how uVDS develops and how it affects global behaviour. In addition, it opens new opportunity to decipher the etiopathological substrate of this pathology by authorizing the use of genetically modified mouse models.
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Affiliation(s)
- R Cassel
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France
| | - P Bordiga
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France
| | - D Pericat
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France
| | | | - B Tighilet
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France
| | - C Chabbert
- Aix Marseille Université, CNRS, UMR 7260, Laboratoire de Neurosciences Intégratives et Adaptatives - Equipe physiopathologie et Thérapie des Désordres Vestibulaires, Marseille, France.
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Wiener-Vacher SR, Wiener SI. Video Head Impulse Tests with a Remote Camera System: Normative Values of Semicircular Canal Vestibulo-Ocular Reflex Gain in Infants and Children. Front Neurol 2017; 8:434. [PMID: 28936193 PMCID: PMC5594068 DOI: 10.3389/fneur.2017.00434] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 08/08/2017] [Indexed: 11/13/2022] Open
Abstract
The video head impulse test (VHIT) is widely used to identify semicircular canal function impairments in adults. But classical VHIT testing systems attach goggles tightly to the head, which is not tolerated by infants. Remote video detection of head and eye movements resolves this issue and, here, we report VHIT protocols and normative values for children. Vestibulo-ocular reflex (VOR) gain was measured for all canals of 303 healthy subjects, including 274 children (aged 2.6 months–15 years) and 26 adults (aged 16–67). We used the Synapsys® (Marseilles, France) VHIT Ulmer system whose remote camera measures head and eye movements. HITs were performed at high velocities. Testing typically lasts 5–10 min. In infants as young as 3 months old, VHIT yielded good inter-measure replicability. VOR gain increases rapidly until about the age of 6 years (with variation among canals), then progresses more slowly to reach adult values by the age of 16. Values are more variable among very young children and for the vertical canals, but showed no difference for right versus left head rotations. Normative values of VOR gain are presented to help detect vestibular impairment in patients. VHIT testing prior to cochlear implants could help prevent total vestibular loss and the resulting grave impairments of motor and cognitive development in patients with residual unilateral vestibular function.
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Affiliation(s)
- Sylvette R Wiener-Vacher
- Vestibulometry Unit, ORL Department, Robert Debré University Hospital, Paris, France.,INSERM U-1141, Robert Debré University Hospital, Paris, France
| | - Sidney I Wiener
- Center for Interdisciplinary Research in Biology (CIRB), College de France, CNRS, INSERM, PSL Research University, Paris, France
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Péricat D, Farina A, Agavnian-Couquiaud E, Chabbert C, Tighilet B. Complete and irreversible unilateral vestibular loss: A novel rat model of vestibular pathology. J Neurosci Methods 2017; 283:83-91. [DOI: 10.1016/j.jneumeth.2017.04.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/26/2017] [Accepted: 04/01/2017] [Indexed: 01/10/2023]
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Kim SK, Kim YB, Park IS, Hong SJ, Kim H, Hong SM. Clinical Analysis of Dizzy Patients with High Levels of Depression and Anxiety. J Audiol Otol 2016; 20:174-178. [PMID: 27942604 PMCID: PMC5144818 DOI: 10.7874/jao.2016.20.3.174] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 06/30/2016] [Accepted: 07/01/2016] [Indexed: 11/22/2022] Open
Abstract
Background and Objectives Some patients experiencing dizziness also report psychological distress. However, the association between vestibular deficits and psychological symptoms remains controversial. Thus, the aim of this paper is to report the proportion of patients who complained of dizziness who also had high depression and anxiety indices. Also we investigated the severity of their dizziness and the distribution of the diseases underlying this symptom. Subjects and Methods We assessed the dizziness and psychological distress of 544 patients experiencing dizziness using the Korean versions of the Dizziness Handicap Inventory (DHI), the Beck Depression Inventory (BDI), and the Spielberger State-Trait Anxiety Inventory (STAI). We also reviewed the audio-vestibular symtoms of patients with high levels of depression and anxiety. Results The incidences of high depression and anxiety scores were 11% (60/544) and 18% (98/544), respectively. Patients with vestibular migraine were most likely to have high depression and anxiety indices. Patients in the high-BDI or high-STAI groups (117/544) obtained significantly higher DHI scores than those in neither the high-BDI nor the high-STAI group (427/544). We noticed that about 20% of the patients experiencing dizziness had high levels of psychological distress in this study; this group also suffered from various vestibular diseases and more symptoms of dizziness. Conclusions The results of the study suggest that psychological evaluation should be considered when assessing patients with vertigo.
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Affiliation(s)
- Sung Kyun Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
| | - Yong Bok Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
| | - Il-Seok Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
| | - Seok Jin Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
| | - Heejin Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
| | - Seok Min Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
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Moser I, Vibert D, Caversaccio MD, Mast FW. Acute peripheral vestibular deficit increases redundancy in random number generation. Exp Brain Res 2016; 235:627-637. [PMID: 27847985 DOI: 10.1007/s00221-016-4829-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 11/09/2016] [Indexed: 11/29/2022]
Abstract
Unilateral peripheral vestibular deficit leads to broad cognitive difficulties and biases in spatial orientation. More specifically, vestibular patients typically show a spatial bias toward their affected ear in the subjective visual vertical, head and trunk orientation, fall tendency, and walking trajectory. By means of a random number generation task, we set out to investigate how an acute peripheral vestibular deficit affects the mental representation of numbers in space. Furthermore, the random number generation task allowed us to test if patients with peripheral vestibular deficit show evidence of impaired executive functions while keeping the head straight and while performing active head turns. Previous research using galvanic vestibular stimulation in healthy people has shown no effects on number space, but revealed increased redundancy of the generated numbers. Other studies reported a spatial bias in number representation during active and passive head turns. In this experiment, we tested 43 patients with acute vestibular neuritis (18 patients with left-sided and 25 with right-sided vestibular deficit) and 28 age-matched healthy controls. We found no bias in number space in patients with peripheral vestibular deficit but showed increased redundancy in patients during active head turns. Patients showed worse performance in generating sequences of random numbers, which indicates a deficit in the updating component of executive functions. We argue that RNG is a promising candidate for a time- and cost-effective assessment of executive functions in patients suffering from a peripheral vestibular deficit.
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Affiliation(s)
- Ivan Moser
- Department of Psychology, University of Bern, Fabrikstrasse 8, Bern, 3012, Switzerland.
- Center for Cognition, Learning and Memory, University of Bern, Fabrikstrasse 8, Bern, 3012, Switzerland.
| | - Dominique Vibert
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, University of Bern, Bern, Switzerland
| | - Marco D Caversaccio
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, University of Bern, Bern, Switzerland
| | - Fred W Mast
- Department of Psychology, University of Bern, Fabrikstrasse 8, Bern, 3012, Switzerland
- Center for Cognition, Learning and Memory, University of Bern, Fabrikstrasse 8, Bern, 3012, Switzerland
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