1
|
Ahsan SA, Dadario NB, Dhaliwal J, Briggs RG, Osipowicz K, Ahsan SM, Chendeb K, Conner AK, O'Neal CM, Glenn CA, Sughrue ME. A parcellation-based connectomic model of hemispatial neglect. J Neuroimaging 2024; 34:267-279. [PMID: 38115162 DOI: 10.1111/jon.13176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND AND PURPOSE Hemispatial neglect is characterized by a reduced awareness to stimuli on the contralateral side. Current literature suggesting that damage to the right parietal lobe and attention networks may cause hemispatial neglect is conflicting and can be improved by investigating a connectomic model of the "neglect system" and the anatomical specificity of regions involved in it. METHODS A meta-analysis of voxel-based morphometry magnetic resonance imaging (MRI) studies of hemispatial neglect was used to identify regions associated with neglect. We applied parcellation schemes to these regions and performed diffusion spectrum imaging (DSI) tractography to determine their connectivity. By overlaying neglect areas and maps of the attention networks, we studied the relationship between them. RESULTS The meta-analysis generated a list of 13 right hemisphere parcellations. These 13 neglect-related parcellations were predominantly linked by the superior longitudinal fasciculus (SLF) throughout a fronto-parietal-temporal network. We found that the dorsal and ventral attention networks showed partial overlap with the neglect system and included various other higher-order networks. CONCLUSIONS We provide an anatomically specific connectomic model of the neurobehavioral substrates underlying hemispatial neglect. Our model suggests a fronto-parietal-temporal network linked via the SLF supports the functions impaired in neglect and implicates various higher-order networks which are not limited to the attention networks.
Collapse
Affiliation(s)
- Syed A Ahsan
- Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Nicholas B Dadario
- Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey, USA
| | | | - Robert G Briggs
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Karol Osipowicz
- Omniscient Neurotechnology, Sydney, New South Wales, Australia
| | - Syed M Ahsan
- Faculty of Medicine, University of New England, Armidale, New South Wales, Australia
| | - Kassem Chendeb
- Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Andrew K Conner
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Christen M O'Neal
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Chad A Glenn
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Michael E Sughrue
- Center for Minimally Invasive Neurosurgery, Prince of Wales Private Hospital, Sydney, New South Wales, Australia
| |
Collapse
|
2
|
Gerrits R, Vingerhoets G. Brain functional segregation, handedness and cognition in situs inversus totalis: A replication study. Neuropsychologia 2023; 191:108731. [PMID: 37949213 DOI: 10.1016/j.neuropsychologia.2023.108731] [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: 07/25/2023] [Revised: 10/04/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
Situs inversus totalis (SIT) is a rare congenital anomaly in which the arrangement of the visceral organs is completely left-right mirrored. A previous study by our lab suggests that SIT (N = 15) correlated with more heterogeneous asymmetrical brain organization and increased left-handedness. In addition, visceral reversal correlated with poorer cognitive performance, especially when hemisphere organization was atypical. The current study sought to replicate these findings in a larger sample. We scanned 23 volunteers with SIT as well as an equal number of controls with usual organ arrangement, and used fMRI to determine their hemisphere dominance for two left hemisphere functions (language and manual praxis) and two right hemisphere functions (spatial attention and face recognition). Effects of SIT etiology were explored by pooling data from the original cohort with the replication sample. Our results reveal that each of those four cognitive functions demonstrated the expected population dominance in SIT, albeit they were less pronounced - but not significantly so - compared to controls. Unusual patterns of hemispheric crowding and mirror-reversal of functional brain organization was observed more often in SIT (48%) than in the controls (30%), but this difference also did not reach statistical significance. However, left-handedness was found to be significantly more common in SIT (26%) than in the overall population (10.6%). Finally, cognitive ability, as assessed by a neuropsychological test battery, was not associated with organ situs or hemisphere organization. Taken together, our data adds to the growing evidence that the determinants of visceral and neural asymmetries are largely independent from one another and that complete situs inversus does not co-occur with an obligatory transposition of the brain's functional architecture. There nevertheless might be instances in which (genetic) mechanisms could simultaneously cause complete visceral reversal and atypical brain laterality.
Collapse
Affiliation(s)
- Robin Gerrits
- Department of Experimental Psychology, Ghent University, Ghent, Belgium
| | - Guy Vingerhoets
- Department of Experimental Psychology, Ghent University, Ghent, Belgium.
| |
Collapse
|
3
|
Moore MJ, Hearne L, Demeyere N, Mattingley JB. Comprehensive voxel-wise, tract-based, and network lesion mapping reveals unique architectures of right and left visuospatial neglect. Brain Struct Funct 2023; 228:2067-2087. [PMID: 37697138 PMCID: PMC10587018 DOI: 10.1007/s00429-023-02702-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 08/27/2023] [Indexed: 09/13/2023]
Abstract
Visuospatial neglect is a common, post-stroke cognitive impairment which is widely considered to be a disconnection syndrome. However, the patterns of disconnectivity associated with visuospatial neglect remain unclear. Here, we had 480 acute stroke survivors [age = 72.8 (SD = 13.3), 44.3% female, 7.5 days post-stroke (SD = 11.3)] undertake routine clinical imaging and standardised visuospatial neglect testing. The data were used to conduct voxel-wise, tract-level, and network-level lesion-mapping analyses aimed at localising the neural correlates of left and right egocentric (body-centred) and allocentric (object-centred) visuospatial neglect. Only minimal anatomical homogeneity was present between the correlates of right and left egocentric neglect across all analysis types. This finding challenges previous work suggesting that right and left visuospatial neglect are anatomically homologous, and instead suggests that egocentric neglect may involve damage to a shared, but hemispherically asymmetric attention network. By contrast, egocentric and allocentric neglect was associated with disconnectivity in a distinct but overlapping set of network edges, with both deficits related to damage across the dorsal and ventral attention networks. Critically, this finding suggests that the distinction between egocentric and allocentric neglect is unlikely to reflect a simple dichotomy between dorsal versus ventral networks dysfunction, as is commonly asserted. Taken together, the current findings provide a fresh perspective on the neural circuitry involved in regulating visuospatial attention, and provide important clues to understanding the cognitive and perceptual processes involved in this common and debilitating neuropsychological syndrome.
Collapse
Affiliation(s)
- Margaret Jane Moore
- Queensland Brain Institute, University of Queensland, St. Lucia, QLD, 4072, Australia.
| | - Luke Hearne
- QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Nele Demeyere
- Department of Experimental Psychology, University of Oxford, Oxford, UK
| | - Jason B Mattingley
- Queensland Brain Institute, University of Queensland, St. Lucia, QLD, 4072, Australia
| |
Collapse
|
4
|
de Pasquale F, Chiacchiaretta P, Pavone L, Sparano A, Capotosto P, Grillea G, Committeri G, Baldassarre A. Brain Topological Reorganization Associated with Visual Neglect After Stroke. Brain Connect 2023; 13:473-486. [PMID: 34269620 PMCID: PMC10618825 DOI: 10.1089/brain.2020.0969] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background/Purpose: To identify brain hubs that are behaviorally relevant for neglect after stroke as well as to characterize their functional architecture of communication. Methods: Twenty acute right hemisphere damaged patients underwent neuropsychological and resting-state functional magnetic resonance imaging sessions. Spatial neglect was assessed by means of the Center of Cancellation on the Bells Cancellation Test. For each patient, resting-state functional connectivity matrices were derived by adopting a brain parcellation scheme consisting of 153 nodes. For every node, we extracted its betweenness centrality (BC) defined as the portion of all shortest paths in the connectome involving such node. Then, neglect hubs were identified as those regions showing a high correlation between their BC and neglect scores. Results: A first set of neglect hubs was identified in multiple systems including dorsal attention and ventral attention, default mode, and frontoparietal executive-control networks within the damaged hemisphere as well as in the posterior and anterior cingulate cortex. Such cortical regions exhibited a loss of BC and increased (i.e., less efficient) weighted shortest path length (WSPL) related to severe neglect. Conversely, a second group of neglect hubs found in visual and motor networks, in the undamaged hemisphere, exhibited a pathological increase of BC and reduction of WSPL associated with severe neglect. Conclusion: The topological reorganization of the brain in neglect patients might reflect a maladaptive shift in processing spatial information from higher level associative-control systems to lower level visual and sensory-motor processing areas after a right hemisphere lesion.
Collapse
Affiliation(s)
| | - Piero Chiacchiaretta
- Department of Neuroscience, Imaging and Clinical Sciences, University G. d'Annunzio of Chieti-Pescara, Chieti, Italy
| | | | | | - Paolo Capotosto
- Department of Neuroscience, Imaging and Clinical Sciences, University G. d'Annunzio of Chieti-Pescara, Chieti, Italy
| | | | - Giorgia Committeri
- Department of Neuroscience, Imaging and Clinical Sciences, University G. d'Annunzio of Chieti-Pescara, Chieti, Italy
| | - Antonello Baldassarre
- Department of Neuroscience, Imaging and Clinical Sciences, University G. d'Annunzio of Chieti-Pescara, Chieti, Italy
- IRCCS NEUROMED, Pozzilli, Italy
| |
Collapse
|
5
|
Zhao Y, Li W, Huang D, Zhang W, Zhang S, Liu Q, Lv P, Yin Y. The therapeutic effect of transcranial direct current stimulation combined with cognitive training on patients with unilateral neglect after stroke. NeuroRehabilitation 2023; 52:477-483. [PMID: 37005898 DOI: 10.3233/nre-220265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
BACKGROUND: Unilateral neglect (UN) is a frequent cognitive disability following a stroke. Additional research is needed to determine the most effective cognitive rehabilitation techniques. OBJECTIVE: Based on the unilateral neglect neural network, we aim to explore the effect of a new model of transcranial direct current stimulation (tDCS) combined with cognitive training on stroke patients with unilateral neglect. METHODS: Thirty stroke patients with UN after stroke were randomly divided into three groups. All patients received cognitive training for UN and transcranial direct current stimulation with an anode placed on the corresponding part of the right hemisphere for 2 weeks. Treatment group A received multi-site tDCS from the inferior parietal lobule, middle temporal gyrus to prefrontal lobe. Group B received single-site tDCS of the inferior parietal lobule. The improvement of UN symptoms was evaluated by the scores of the Deviation index and Behavioral Inattention Test conventional tests. RESULTS: All groups showed improvements in all tests, and the scores of the treatment groups were statistically significant compared with the control group. CONCLUSION: Both single-site tDCS and multi-site tDCS have therapeutic effects on UN after stroke, and the difference in the therapeutic effects of the two modes still needs to be further explored.
Collapse
Affiliation(s)
- Yue Zhao
- North China University of Science and Technology, Tangshan, China
- Hebei Medical University, Shijiazhuang, China
| | - Weibo Li
- The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Dai Huang
- Hebei General Hospital, Shijiazhuang, China
| | | | - Shaohua Zhang
- The Eighth Hospital of Hebei Province, Shijiazhuang, China
| | | | - Peiyuan Lv
- Hebei General Hospital, Shijiazhuang, China
- Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, China
| | - Yu Yin
- North China University of Science and Technology, Tangshan, China
- Hebei Medical University, Shijiazhuang, China
- Hebei General Hospital, Shijiazhuang, China
- Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, China
| |
Collapse
|
6
|
Abstract
Unilateral spatial neglect (USN) is a common and disabling cognitive consequence of stroke wherein individuals demonstrate decreased response to contralesional information. Here, we provide an updated narrative review of studies that shed light on the neural mechanisms and predictors of recovery of USN. Additionally, we report a rapid review of randomized controlled trials focusing on USN intervention, both nonpharmacological and pharmacological, published in the last 5 years. Randomized controlled trials are reviewed within the context of systematic reviews and meta-analyses of USN interventions published within the same time frame. The quality of randomized controlled trials of treatment is higher compared to quality reported in previous reviews and meta-analyses. However, remaining weaknesses in participant demographic reporting, as well as small, heterogenous samples, render generalizability and cross-study interpretation a challenge. Nevertheless, evidence regarding neural mechanisms underlying USN recovery and regarding the effectiveness of targeted USN interventions is accumulating and strengthening, setting the foundation for future investigations into patient-specific factors that may influence treatment response. We identify gaps and provide suggestions for future USN intervention research.
Collapse
Affiliation(s)
- Alexandra Zezinka Durfee
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD (A.Z.D., A.E.H.)
| | - Argye E Hillis
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD (A.Z.D., A.E.H.).,Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD (A.E.H.).,Department of Cognitive Science, Johns Hopkins University, Baltimore, MD (A.E.H.)
| |
Collapse
|
7
|
Derbie AY, Dejenie MA, Zegeye TG. Visuospatial representation in patients with mild cognitive impairment: Implication for rehabilitation. Medicine (Baltimore) 2022; 101:e31462. [PMID: 36343037 PMCID: PMC9646670 DOI: 10.1097/md.0000000000031462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Behavioral and neurophysiological experiments have demonstrated that distinct and common cognitive processes and associated neural substrates maintain allocentric and egocentric spatial representations. This review aimed to provide evidence from previous behavioral and neurophysiological studies on collating cognitive processes and associated neural substrates and linking them to the state of visuospatial representations in patients with mild cognitive impairment (MCI). Even though MCI patients showed impaired visuospatial attentional processing and working memory, previous neuropsychological experiments in MCI largely emphasized memory impairment and lacked substantiating evidence of whether memory impairment could be associated with how patients with MCI encode objects in space. The present review suggests that impaired memory capacity is linked to impaired allocentric representation in MCI patients. This review indicates that further research is needed to examine how the decline in visuospatial attentional resources during allocentric coding of space could be linked to working memory impairment.
Collapse
Affiliation(s)
- Abiot Y. Derbie
- Applied Cognitive Neuroscience Laboratory, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong
- Department of Psychology, Bahir Dar University, Bahir Dar, Ethiopia
- *Correspondence: Abiot Y. Derbie, Department of Psychology, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia (e-mail: )
| | | | - Tsigie G. Zegeye
- Department of Special Needs, Bahir Dar University, Bahir Dar, Ethiopia
| |
Collapse
|
8
|
Cha S, Jeong B, Choi M, Kwon S, Lee SH, Paik NJ, Kim WS, Han CE. White matter tracts involved in subcortical unilateral spatial neglect in subacute stroke. Front Neurol 2022; 13:992107. [PMID: 36247754 PMCID: PMC9561922 DOI: 10.3389/fneur.2022.992107] [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: 07/12/2022] [Accepted: 09/14/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundUnilateral spatial neglect (USN) is common and associated with poor motor and cognitive outcomes as well as impaired quality of life following stroke. Traditionally, the neural substrates underlying USN have been thought to be cortical areas, such as the posterior parietal cortex. However, patients with stroke involving only subcortical structures may also present with USN. While only a few studies have reported on USN in subcortical stroke, the involvement of white matter tracts related to brain networks of visuospatial attention is one possible explanation for subcortical neglect. Therefore, this study aimed to investigate which specific white matter tracts are neural substrates for USN in patients with subcortical stroke.MethodsTwenty-two patients with subcortical stroke without cortical involvement who were admitted to the Department of Rehabilitation Medicine at Seoul National University Bundang Hospital were retrospectively enrolled. Nine subjects were subclassified into a “USN(+)” group, as they had at least two positive results on three tests (the Schenkenberg line bisection test, Albert's test, and house drawing test) and a score of 1 or higher on the Catherine Bergego scale. The remaining 13 subjects without abnormalities on those tests were subclassified into the “USN(–)” group. Stroke lesions on MRI were manually drawn using MRIcron software. Lesion overlapping and atlas-based analyses of MRI images were conducted. The correlation was analyzed between the overlapped lesion volumes with white matter tracts and the severity of USN (in the Albert test and the Catherine Bergego scale).ResultsLesions were more widespread in the USN(+) group than in the USN(–) group, although their locations in the right hemisphere were similar. The atlas-based analyses identified that the right cingulum in the cingulate cortex, the temporal projection of the superior longitudinal fasciculus, and the forceps minor significantly overlapped with the lesions in the USN(+) group than in the USN(–) group. The score of the Catherine Bergego scale correlated with the volume of the involved white matter tracts.ConclusionIn this study, white matter tracts associated with USN were identified in patients with subcortical stroke without any cortical involvement. Our study results, along with previous findings on subcortical USN, support that USN may result from damage to white matter pathways.
Collapse
Affiliation(s)
- Seungwoo Cha
- Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - ByeongChang Jeong
- Department of Electronics and Information Engineering, Korea University, Sejong, South Korea
- Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology, Korea University, Sejong, South Korea
| | - Myungwon Choi
- Department of Electronics and Information Engineering, Korea University, Sejong, South Korea
| | - Sohyun Kwon
- Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Stephanie Hyeyoung Lee
- Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Nam-Jong Paik
- Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Won-Seok Kim
- Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
- Won-Seok Kim
| | - Cheol E. Han
- Department of Electronics and Information Engineering, Korea University, Sejong, South Korea
- Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology, Korea University, Sejong, South Korea
- *Correspondence: Cheol E. Han
| |
Collapse
|
9
|
Firwana YMS, Zolkefley MKI, Mohamed Hatta HZ, Rowbin C, Che Mohd Nassir CMN, Hanafi MH, Abdullah MS, Keserci B, Lannin NA, Mustapha M. Regional cerebral blood perfusion changes in chronic stroke survivors as potential brain correlates of the functional outcome following gamified home-based rehabilitation (IntelliRehab)-a pilot study. J Neuroeng Rehabil 2022; 19:94. [PMID: 36002827 PMCID: PMC9404656 DOI: 10.1186/s12984-022-01072-w] [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: 03/18/2021] [Accepted: 08/18/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hospital-based stroke rehabilitation for stroke survivors in developing countries may be limited by staffing ratios and length of stay that could hamper recovery potential. Thus, a home-based, gamified rehabilitation system (i.e., IntelliRehab) was tested for its ability to increase cerebral blood flow (CBF), and the secondary impact of changes on the upper limb motor function and functional outcomes. OBJECTIVE To explore the effect of IntelliRehab on CBF in chronic stroke patients and its correlation with the upper limb motor function. METHODS Two-dimensional pulsed Arterial Spin Labelling (2D-pASL) was used to obtain CBF images of stable, chronic stroke subjects (n = 8) over 3-months intervention period. CBF alterations were mapped, and the detected differences were marked as regions of interest. Motor functions represented by Fugl-Meyer Upper Extremity Assessment (FMA) and Stroke Impact Scale (SIS) were used to assess the primary and secondary outcomes, respectively. RESULTS Regional CBF were significantly increased in right inferior temporal gyrus and left superior temporal white matter after 1-month (p = 0.044) and 3-months (p = 0.01) of rehabilitation, respectively. However, regional CBF in left middle fronto-orbital gyrus significantly declined after 1-month of rehabilitation (p = 0.012). Moreover, SIS-Q7 and FMA scores significantly increased after 1-month and 3-months of rehabilitation. There were no significant correlations, however, between CBF changes and upper limb motor function. CONCLUSIONS Participants demonstrated improved motor functions, supporting the benefit of using IntelliRehab as a tool for home-based rehabilitation. However, within-participant improvements may have limited potential that suggests the need for a timely administration of IntelliRehab to get the maximum capacity of improvement.
Collapse
Affiliation(s)
- Younis M S Firwana
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Mohd Khairul Izamil Zolkefley
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.,Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Kuantan, Malaysia
| | - Hasnetty Zuria Mohamed Hatta
- Rehabilitation Unit, Hospital Universiti Sains Malaysia, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Christina Rowbin
- Rehabilitation Unit, Hospital Universiti Sains Malaysia, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Che Mohd Nasril Che Mohd Nassir
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.,Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, Kuala Lumpur, Malaysia
| | - Muhammad Hafiz Hanafi
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.,Rehabilitation Unit, Hospital Universiti Sains Malaysia, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Mohd Shafie Abdullah
- Department of Radiology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Bilgin Keserci
- Department of Radiology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Natasha A Lannin
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Australia
| | - Muzaimi Mustapha
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
| |
Collapse
|
10
|
Diel A, Lewis M. The uncanniness of written text is explained by configural deviation and not by processing disfluency. Perception 2022; 51:3010066221114436. [PMID: 35912496 DOI: 10.1177/03010066221114436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Deviating from human norms in human-looking artificial entities can elicit uncanny sensations, described as the uncanny valley. This study investigates in three tasks whether configural deviation in written text also increases uncanniness. It further evaluates whether the uncanniness of text is better explained by perceptual disfluency and especially deviations from specialized categories, or conceptual disfluency caused by ambiguity. In the first task, lower sentence readability predicted uncanniness, but deviating sentences were more uncanny than typical sentences despite being just as readable. Furthermore, familiarity with a language increased the effect of configural deviation on uncanniness but not the effect of non-configural deviation (blur). In the second and third tasks, semantically ambiguous words and sentences were not uncannier than typical sentences, but deviating, non-ambiguous sentences were. Deviations from categories with specialized processing mechanisms thus better fit the observed results as an explanation of the uncanny valley than ambiguity-based explanations.
Collapse
|
11
|
Bunker LD, Walker A, Meier E, Goldberg E, Leigh R, Hillis AE. Hyperintense vessels on imaging account for neurological function independent of lesion volume in acute ischemic stroke. Neuroimage Clin 2022; 34:102991. [PMID: 35339984 PMCID: PMC8957047 DOI: 10.1016/j.nicl.2022.102991] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/04/2022] [Accepted: 03/21/2022] [Indexed: 11/30/2022]
Abstract
Studies have revealed variable significance of FLAIR hyperintense vessels (FHV). We found number and location of FHV are associated with functional deficits. Functional measures correlated with FHV independently of lesion volume.
In acute ischemic stroke, reported relationships between lesion metrics and behavior have largely focused on lesion volume and location. However, hypoperfusion has been shown to correlate with deficits in the acute stage. Hypoperfusion is typically identified using perfusion imaging in clinical settings, which requires contrast. Unfortunately, contrast is contraindicated for some individuals. An alternative method has been proposed to identify hypoperfusion using hyperintense vessels on fluid-attenuated inversion recovery (FLAIR) imaging. This study aimed to validate the clinical importance of considering hypoperfusion when accounting for behavior in acute stroke and demonstrate the clinical utility of scoring the presence of hyperintense vessels to quantify it. One hundred and fifty-three participants with acute ischemic stroke completed a battery of commonly-used neurological and behavioral measures. Clinical MRIs were used to determine lesion volume and to score the presence of hyperintense vessels seen on FLAIR images to estimate severity of hypoperfusion in six different vascular regions. National Institutes of Health Stroke Scale (NIHSS) scores, naming accuracy (left hemisphere strokes), and language content produced during picture description were examined in relation to lesion volume, hypoperfusion, and demographic variables using correlational analyses and multivariable linear regression. Results showed that lesion volume and hypoperfusion, in addition to demographic variables, were independently associated with performance on NIHSS, naming, and content production. Specifically, hypoperfusion in the frontal lobe independently correlated with NIHSS scores, while hypoperfusion in parietal areas independently correlated with naming accuracy and content production. These results correspond to previous reports associating hypoperfusion with function, confirming that hypoperfusion is an important consideration—beyond lesion volume—when accounting for behavior in acute ischemic stroke. Quantifying hypoperfusion using FLAIR hyperintense vessels can be an essential clinical tool when other methods of identifying hypoperfusion are unavailable or time prohibitive.
Collapse
Affiliation(s)
- Lisa D Bunker
- Johns Hopkins University School of Medicine, Department of Neurology and Neuroscience, Baltimore, MD 21287, USA
| | - Alexandra Walker
- Johns Hopkins University School of Medicine, Department of Neurology and Neuroscience, Baltimore, MD 21287, USA
| | - Erin Meier
- Northeastern University Bouvé College of Health Sciences, Department of Communication Sciences and Disorders, Boston, MA 02115, USA
| | - Emily Goldberg
- University of Pittsburgh, Department of Communication Science and Disorders, Pittsburgh, PA 15260, USA
| | - Richard Leigh
- Johns Hopkins University School of Medicine, Department of Neurology and Neuroscience, Baltimore, MD 21287, USA
| | - Argye E Hillis
- Johns Hopkins University School of Medicine, Department of Neurology and Neuroscience, Baltimore, MD 21287, USA. https://twitter.com/@HopkinsSKSI
| |
Collapse
|
12
|
Muroi D, Saito Y, Koyake A, Yasuda K, Higuchi T. Walking through a narrow opening improves collision avoidance behavior in a patient with stroke and unilateral spatial neglect: an ABA single-case design. Neurocase 2022; 28:149-157. [PMID: 35465827 DOI: 10.1080/13554794.2022.2042566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We investigated the effect of a 3-week intervention-wherein a patient with unilateral spatial neglect walks through a narrow opening while entering from the contralesional side-to improve walking ability or ADL. A 66-year-old man was diagnosed with right parietal subcortical hemorrhage. We used an ABA single-case design; period B was set as the intervention. The intervention improved the continuous walking distance and balance ability and decreased the number of collisions when walking through the narrow opening; however, it exerted minimal effect on ADL. Thus, the intervention may effectively improve continuous physical or spatial attention behavior, regardless of ADL improvement.
Collapse
Affiliation(s)
- Daisuke Muroi
- Department of Rehabilitation, Kameda Medical Center, Chiba, Japan.,Department of Health Promotion Science, Tokyo Metropolitan University, Tokyo, Japan.,Division of Physical Therapy, Department of Rehabilitation Sciences, Faculty of Health Care Sciences, Chiba Prefectural University of Health Sciences, Chiba, Japan
| | - Yutaro Saito
- Department of Rehabilitation, Kameda Medical Center, Chiba, Japan
| | - Aki Koyake
- Department of Rehabilitation, Kameda Medical Center, Chiba, Japan
| | - Kazuhiro Yasuda
- Department of Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
| | - Takahiro Higuchi
- Department of Health Promotion Science, Tokyo Metropolitan University, Tokyo, Japan
| |
Collapse
|
13
|
Stein C, Bunker L, Chu B, Leigh R, Faria A, Hillis AE. Various tests of left neglect are associated with distinct territories of hypoperfusion in acute stroke. Brain Commun 2022; 4:fcac064. [PMID: 35386220 PMCID: PMC8977645 DOI: 10.1093/braincomms/fcac064] [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: 10/28/2021] [Revised: 12/18/2021] [Accepted: 03/15/2022] [Indexed: 11/24/2022] Open
Abstract
Hemispatial neglect is among the most disabling consequences of right hemisphere stroke. However, there is no consensus on the optimal assessments to identify neglect. We hypothesized that different tests for neglect given the same day (i) detect distinct aspects and types of neglect, (ii) are sensitive to different cognitive functions (beyond spatially specific processing) and (iii) are associated with distinct regions of hypoperfusion. We examined data from 135 participants with acute, right-hemispheric ischaemic stroke who received an MRI and neglect testing within 48 h of acute infarct in a cross-sectional study. The volume of infarct was calculated on diffusion-weighted imaging. We also scored severity and location of fluid-attenuated inversion recovery hyperintense vessels in six areas (anterior cerebral artery territory, posterior cerebral artery territory and four within the middle cerebral artery territory) to estimate the volume and location of hypoperfusion in acute stroke. Neglect tests included gap detection, scene copy, line bisection, line cancellation, oral reading and picture description. We found strong correlations between tests that evaluated viewer-centred processing, as well as strong correlations between tests that evaluated stimulus-centred processing. The error rate on different tests was associated with hypoperfusion in different vascular territories, even after controlling for the volume of an infarct. Our results confirm that it is essential to administer a battery of different tests of hemispatial neglect to capture various deficits in attention and spatially specific processing that underlies neglect. Our results also show the potential usefulness of hyperintense vessel ratings as an indication of dysfunction beyond the infarct, as the ratings (and not infarct volume) were highly associated with many clinical deficits. Finally, results underscore that diverse types of neglect are clinically important in acute stroke, as they reflect different areas of hypoperfused tissue, which may be salvageable in the absence of infarct in those areas. As such, neglect batteries may be useful for detecting patients with cortical hypoperfusion who are candidates for reperfusion therapies.
Collapse
Affiliation(s)
- Colin Stein
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Lisa Bunker
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Brian Chu
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Richard Leigh
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Andreia Faria
- Department of Radiology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Argye E. Hillis
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Department of Physical Medicine & Rehabilitation, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Department of Cognitive Science, Johns Hopkins University, Baltimore, MD, USA
| |
Collapse
|
14
|
Ros T, Michela A, Mayer A, Bellmann A, Vuadens P, Zermatten V, Saj A, Vuilleumier P. Disruption of large-scale electrophysiological networks in stroke patients with visuospatial neglect. Netw Neurosci 2022; 6:69-89. [PMID: 35356193 PMCID: PMC8959119 DOI: 10.1162/netn_a_00210] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 09/17/2021] [Indexed: 11/29/2022] Open
Abstract
Stroke frequently produces attentional dysfunctions including symptoms of hemispatial neglect, which is characterized by a breakdown of awareness for the contralesional hemispace. Recent studies with functional MRI (fMRI) suggest that hemineglect patients display abnormal intra- and interhemispheric functional connectivity. However, since stroke is a vascular disorder and fMRI signals remain sensitive to nonneuronal (i.e., vascular) coupling, more direct demonstrations of neural network dysfunction in hemispatial neglect are warranted. Here, we utilize electroencephalogram (EEG) source imaging to uncover differences in resting-state network organization between patients with right hemispheric stroke (N = 15) and age-matched, healthy controls (N = 27), and determine the relationship between hemineglect symptoms and brain network organization. We estimated intra- and interregional differences in cortical communication by calculating the spectral power and amplitude envelope correlations of narrow-band EEG oscillations. We first observed focal frequency-slowing within the right posterior cortical regions, reflected in relative delta/theta power increases and alpha/beta/gamma decreases. Secondly, nodes within the right temporal and parietal cortex consistently displayed anomalous intra- and interhemispheric coupling, stronger in delta and gamma bands, and weaker in theta, alpha, and beta bands. Finally, a significant association was observed between the severity of left-hemispace search deficits (e.g., cancellation test omissions) and reduced functional connectivity within the alpha and beta bands. In sum, our novel results validate the hypothesis of large-scale cortical network disruption following stroke and reinforce the proposal that abnormal brain oscillations may be intimately involved in the pathophysiology of visuospatial neglect. Stroke patients often exhibit a disabling deficit of visual awareness in the hemifield opposite to their brain lesion, known as hemineglect. Recent studies with functional MRI (fMRI) suggest that hemineglect patients display abnormal functional coupling (i.e., connectivity) within and between brain hemispheres. However, since stroke is a vascular disorder and fMRI measures nonneuronal (i.e., vascular) coupling, we here provide direct evidence of neural network dysfunction in hemineglect by using electroencephalogram (EEG) source imaging, which measures the electrical fluctuations of large neuronal populations. Overall, we observed a breakdown of interhemispheric network connectivity within alpha/beta rhythms, which specifically correlated with the degree of patients’ hemispatial errors. The high temporal resolution and frequency content of EEG signals could lead to more sensitive markers and targeted rehabilitation approaches of hemineglect.
Collapse
Affiliation(s)
- Tomas Ros
- Department of Neuroscience, University of Geneva, Geneva, Switzerland
- CIBM Center for Biomedical Imaging, Geneva University Hospitals, Geneva, Switzerland
| | - Abele Michela
- Department of Neuroscience, University of Geneva, Geneva, Switzerland
| | - Anaïs Mayer
- Romand Clinic of Readaptation, SUVA, Sion, Switzerland
| | - Anne Bellmann
- Romand Clinic of Readaptation, SUVA, Sion, Switzerland
| | | | | | - Arnaud Saj
- Department of Neuroscience, University of Geneva, Geneva, Switzerland
- Department of Neurology, Geneva University Hospital, Geneva, Switzerland
| | | |
Collapse
|
15
|
Spatial attention in children with perinatal stroke. Behav Brain Res 2022; 417:113614. [PMID: 34606777 DOI: 10.1016/j.bbr.2021.113614] [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: 04/25/2021] [Revised: 09/21/2021] [Accepted: 09/29/2021] [Indexed: 11/24/2022]
Abstract
Spatial neglect is a common feature of right hemisphere damage in adults, but less is known about spatial inattention following early brain damage. We used a Posner-based cueing task to examine hemispatial neglect and aspects of attention in children with perinatal stroke in either left (LH) or right hemisphere (RH) and controls. A visual perception task assessed the speed of visual perception. A spatial attention cueing task (the E-task) measured the ability to discriminate the direction of a target stimulus ("E"), when presented on the left or right side of the screen. This task provided indices of performance for attention orienting, disengagement and reorienting. Children with LH lesions had slowed visual perception compared to controls. Children with RH lesions did not demonstrate similar deficits. On the E-task, groups with both LH and RH lesions demonstrated lower accuracy on both left and right sides compared to controls. Children with LH lesions also showed impaired attention orienting and disengagement on left and right sides compared to controls, while children with RH lesions were most impaired in orienting and disengagement on their contralesional side. Children with LH lesions demonstrated more extensive attentional deficits than children with RH lesions. These results suggest that development of spatial attention may require different neural networks than maintenance of attention.
Collapse
|
16
|
Saxena S, Keser Z, Rorden C, Bonilha L, Fridriksson J, Walker A, Hillis AE. Disruptions of the Human Connectome Associated With Hemispatial Neglect. Neurology 2022; 98:e107-e114. [PMID: 35263271 PMCID: PMC8762585 DOI: 10.1212/wnl.0000000000013050] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 11/02/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Hemispatial neglect is a heterogeneous and complex disorder that can be classified by frame of reference for "left" vs "right," including viewer-centered neglect (VCN, affecting the contralesional side of the view), stimulus-centered neglect (SCN, affecting the contralesional side of the stimulus, irrespective of its location with respect to the viewer), or both. We investigated the effect of acute stroke lesions on the connectivity of neural networks that underlie VCN or SCN. METHODS A total of 174 patients within 48 hours of acute right hemispheric infarct underwent a detailed hemispatial neglect assessment that included oral reading, scene copy, line cancellation, gap detection, horizontal line bisection tests, and MRI. Each patient's connectivity map was generated. We performed a linear association analysis between network connectivity strength and continuous measures of neglect to identify lesion-induced disconnections associated with the presence or severity of VCN and SCN. Results were corrected for multiple comparisons. RESULTS About 42% of the participants with right hemisphere stroke had at least one type of neglect. The presence of any type of neglect was associated with lesions to tracts connecting the right inferior parietal cortex, orbitofrontal cortex, and right thalamus to other right-hemispheric structures. VCN only was strongly associated with tracts connecting the right putamen to other brain regions and tracts connecting right frontal regions with other brain regions. The presence of both types of neglect was most strongly associated with tracts connecting the right inferior and superior parietal cortex to other brain regions and those connecting left or right mesial temporal cortex to other brain regions. DISCUSSION Our study provides new evidence for the specific white matter tracts where disruption can cause hemispatial neglect in a relatively large number of participants and homogeneous time after onset. We obtained MRI and behavioral testing acutely, before the opportunity for rehabilitation or substantial recovery. CLASSIFICATION OF EVIDENCE This study provides Class II evidence that damage to specific white matter tracts identified on MRI are associated with the presence of neglect following right hemispheric stroke.
Collapse
Affiliation(s)
- Sadhvi Saxena
- From the Departments of Neurology (S.S., Z.K., A.W., A.E.H.) and Physical and Medicine & Rehabilitation (A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD; Departments of Psychology (C.R.) and Communication Sciences and Disorders (J.F.), University of South Carolina, Columbia; Department of Neurology (L.B.), Medical University of South Carolina, Charleston; and Department of Cognitive Science (A.E.H.), Johns Hopkins University, Baltimore, MD
| | - Zafer Keser
- From the Departments of Neurology (S.S., Z.K., A.W., A.E.H.) and Physical and Medicine & Rehabilitation (A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD; Departments of Psychology (C.R.) and Communication Sciences and Disorders (J.F.), University of South Carolina, Columbia; Department of Neurology (L.B.), Medical University of South Carolina, Charleston; and Department of Cognitive Science (A.E.H.), Johns Hopkins University, Baltimore, MD
| | - Chris Rorden
- From the Departments of Neurology (S.S., Z.K., A.W., A.E.H.) and Physical and Medicine & Rehabilitation (A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD; Departments of Psychology (C.R.) and Communication Sciences and Disorders (J.F.), University of South Carolina, Columbia; Department of Neurology (L.B.), Medical University of South Carolina, Charleston; and Department of Cognitive Science (A.E.H.), Johns Hopkins University, Baltimore, MD
| | - Leonardo Bonilha
- From the Departments of Neurology (S.S., Z.K., A.W., A.E.H.) and Physical and Medicine & Rehabilitation (A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD; Departments of Psychology (C.R.) and Communication Sciences and Disorders (J.F.), University of South Carolina, Columbia; Department of Neurology (L.B.), Medical University of South Carolina, Charleston; and Department of Cognitive Science (A.E.H.), Johns Hopkins University, Baltimore, MD
| | - Julius Fridriksson
- From the Departments of Neurology (S.S., Z.K., A.W., A.E.H.) and Physical and Medicine & Rehabilitation (A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD; Departments of Psychology (C.R.) and Communication Sciences and Disorders (J.F.), University of South Carolina, Columbia; Department of Neurology (L.B.), Medical University of South Carolina, Charleston; and Department of Cognitive Science (A.E.H.), Johns Hopkins University, Baltimore, MD
| | - Alexandra Walker
- From the Departments of Neurology (S.S., Z.K., A.W., A.E.H.) and Physical and Medicine & Rehabilitation (A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD; Departments of Psychology (C.R.) and Communication Sciences and Disorders (J.F.), University of South Carolina, Columbia; Department of Neurology (L.B.), Medical University of South Carolina, Charleston; and Department of Cognitive Science (A.E.H.), Johns Hopkins University, Baltimore, MD
| | - Argye Elizabeth Hillis
- From the Departments of Neurology (S.S., Z.K., A.W., A.E.H.) and Physical and Medicine & Rehabilitation (A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD; Departments of Psychology (C.R.) and Communication Sciences and Disorders (J.F.), University of South Carolina, Columbia; Department of Neurology (L.B.), Medical University of South Carolina, Charleston; and Department of Cognitive Science (A.E.H.), Johns Hopkins University, Baltimore, MD.
| |
Collapse
|
17
|
Moore MJ, Gillebert CR, Demeyere N. Right and left neglect are not anatomically homologous: A voxel-lesion symptom mapping study. Neuropsychologia 2021; 162:108024. [PMID: 34537205 PMCID: PMC8589961 DOI: 10.1016/j.neuropsychologia.2021.108024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 08/02/2021] [Accepted: 09/14/2021] [Indexed: 12/16/2022]
Abstract
Visuospatial neglect is a heterogenous syndrome which can occur following damage to either right or left hemisphere areas. This study employs voxel-lesion symptom mapping to identify the neural correlates of left and right egocentric and allocentric neglect in a large acute stroke cohort. A cohort of 446 acute stroke survivors (age = 26-95, 44% female) completed neuropsychological neglect assessment and routine clinical imaging. Similar to previous investigations, left egocentric and left allocentric neglect were associated with damage to distinct clusters of voxels within the posterior parietal and temporo-parietal junction areas. Unlike previous investigations, right egocentric neglect was found to most strongly associated with damage to more posterior voxels within left occipital cortical areas. Right allocentric neglect was found to be most strongly associated with damage to the anterior limb of the left internal capsule. Interestingly, the right hemisphere homologues of the areas implicated in right-lateralised neglect were not overlapping with those associated with left neglect impairment. This dissociation was present across both egocentric and allocentric neglect impairment. The results of this investigation suggest that right egocentric/allocentric neglect should not be characterised as a consequence of damage to left-hemisphere homologues of the right hemisphere attentional systems. These findings support the characterisation of visuospatial neglect as a heterogenous cluster of impairments rather than a unitary syndrome and provide novel insight into the neural correlates of spatial attention.
Collapse
Affiliation(s)
- Margaret Jane Moore
- University of Oxford, Department of Experimental Psychology, Radcliffe Observatory Quarter, Oxford, OX2 6GG, United Kingdom
| | - Celine R Gillebert
- University of Oxford, Department of Experimental Psychology, Radcliffe Observatory Quarter, Oxford, OX2 6GG, United Kingdom; Department of Brain and Cognition, KU Leuven, Tiensestraat 102 Box 3711, 3000, Leuven, Belgium
| | - Nele Demeyere
- University of Oxford, Department of Experimental Psychology, Radcliffe Observatory Quarter, Oxford, OX2 6GG, United Kingdom.
| |
Collapse
|
18
|
Frigato G. The Neural Correlates of Access Consciousness and Phenomenal Consciousness Seem to Coincide and Would Correspond to a Memory Center, an Activation Center and Eight Parallel Convergence Centers. Front Psychol 2021; 12:749610. [PMID: 34659068 PMCID: PMC8511498 DOI: 10.3389/fpsyg.2021.749610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/01/2021] [Indexed: 11/23/2022] Open
Abstract
An increasing number of authors suggest that the neural correlates of consciousness (NCC) have no selective, executive, or metacognitive function. It is believed that attention unconsciously selects the contents that will become conscious. Consciousness would have only the fundamental function of transforming the selected contents into a format easily used by high-level processors, such as working memory, language, or autobiographical memory. According to Dehaene, the neural correlates (NC) of access consciousness (AC; cognitive consciousness) constitute a widespread network in the frontal, parietal, and temporal cortices. While Tononi localized the correlates of phenomenal consciousness (PC; subjective consciousness) to a posterior “hot zone” in the temporo-parietal cortex. A careful examination of the works of these two groups leads to the conclusion that the correlates of access and PC coincide. The two consciousnesses are therefore two faces of the same single consciousness with both its cognitive and subjective contents. A review of the literature of the pathology called “neglect” confirms that the common correlates include 10: a memory center, an activation center, and eight parallel centers. From study of the “imagery” it can be deduced that these eight parallel centers would operate as points of convergence in the third person linking the respective eight sensory-motor-emotional areas activated by external perceptions and the corresponding memories of these perceptions deposited in the memory center. The first four centers of convergence appear in the most evolved fish and gradually reach eight in humans.
Collapse
|
19
|
Osawa A, Maeshima S. Unilateral Spatial Neglect Due to Stroke. Stroke 2021. [DOI: 10.36255/exonpublications.stroke.spatialneglect.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
20
|
Chen P, Toglia J. The 3s Spreadsheet Test version 2 for assessing egocentric viewer-centered and allocentric stimulus-centered spatial neglect. APPLIED NEUROPSYCHOLOGY-ADULT 2021; 29:1369-1379. [PMID: 33556259 DOI: 10.1080/23279095.2021.1878462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The present study established the norms of the 3 s Spreadsheet Test version 2 (3S-v2 Test) with 186 healthy adults, compared performance of 23 individuals with spatial neglect after right brain stroke to the norms, and examined the extent that allocentric neglect is independent from egocentric neglect. The task required in the 3S-v2 Test is to cross out the target digit "3" in a spreadsheet that contained 10 columns and 14 rows of digit strings, including 120 target digits and 720 non-target digits. Each target is categorized with respect to its location on the page (egocentric viewer-centered) and its position within the digit string (allocentric stimulus-centered). Patients completed the 3S-v2 Test, the Apples Test, and Scene Copying Test (a five-object figure copying test). Based on the neglect classification criteria of these three tests, 18 patients (78.3%) were identified with both forms of neglect, three patients (13.0%) had isolated egocentric neglect, and two (8.7%) had isolated allocentric neglect. Among patients who were determined as having allocentric neglect by a given test, we found no significant correlation between severity of allocentric neglect and stimulus location in the egocentric reference frame. Based on the present findings, we suggest that including the 3S-v2 Test, a functionally relevant task and different from the currently available tests, may increase the comprehensiveness of neglect assessment. In addition, allocentric neglect symptoms are independent of egocentric locations.
Collapse
Affiliation(s)
- Peii Chen
- Center for Stroke Rehabilitation Research, Kessler Foundation, West Orange, NJ, USA.,Department of Physical Medicine and Rehabilitation, Rutgers University, Newark, NJ, USA
| | - Joan Toglia
- School of Health and Natural Sciences, Mercy College, Dobbs Ferry, NY, USA.,Rehabilitation Medicine Department, New York Presbyterian Hospital, Weill Cornell Medical Center, New York, NY, USA
| |
Collapse
|
21
|
Sani I, Stemmann H, Caron B, Bullock D, Stemmler T, Fahle M, Pestilli F, Freiwald WA. The human endogenous attentional control network includes a ventro-temporal cortical node. Nat Commun 2021; 12:360. [PMID: 33452252 PMCID: PMC7810878 DOI: 10.1038/s41467-020-20583-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Accepted: 12/07/2020] [Indexed: 01/29/2023] Open
Abstract
Endogenous attention is the cognitive function that selects the relevant pieces of sensory information to achieve goals and it is known to be controlled by dorsal fronto-parietal brain areas. Here we expand this notion by identifying a control attention area located in the temporal lobe. By combining a demanding behavioral paradigm with functional neuroimaging and diffusion tractography, we show that like fronto-parietal attentional areas, the human posterior inferotemporal cortex exhibits significant attentional modulatory activity. This area is functionally distinct from surrounding cortical areas, and is directly connected to parietal and frontal attentional regions. These results show that attentional control spans three cortical lobes and overarches large distances through fiber pathways that run orthogonally to the dominant anterior-posterior axes of sensory processing, thus suggesting a different organizing principle for cognitive control.
Collapse
Affiliation(s)
- Ilaria Sani
- grid.134907.80000 0001 2166 1519Laboratory of Neural Systems, The Rockefeller University, 1230 York Avenue, New York, NY 10065 USA ,grid.8591.50000 0001 2322 4988Laboratory of Neurology & Imaging of Cognition, University of Geneva, Chemin de mines 9, 1202 Geneva, CH Switzerland
| | - Heiko Stemmann
- grid.7704.40000 0001 2297 4381Institute for Brain Research and Center for Advanced Imaging, University of Bremen, 28334 Bremen, Germany
| | - Bradley Caron
- grid.411377.70000 0001 0790 959XDepartment of Psychological and Brain Sciences, Indiana University, Bloomington, IN USA
| | - Daniel Bullock
- grid.411377.70000 0001 0790 959XDepartment of Psychological and Brain Sciences, Indiana University, Bloomington, IN USA
| | - Torsten Stemmler
- grid.7704.40000 0001 2297 4381Institute for Brain Research and Center for Advanced Imaging, University of Bremen, 28334 Bremen, Germany
| | - Manfred Fahle
- grid.7704.40000 0001 2297 4381Institute for Brain Research and Center for Advanced Imaging, University of Bremen, 28334 Bremen, Germany
| | - Franco Pestilli
- grid.411377.70000 0001 0790 959XDepartment of Psychological and Brain Sciences, Indiana University, Bloomington, IN USA ,grid.89336.370000 0004 1936 9924Department of Psychology, The University of Texas at Austin, Austin, TX 78712 USA
| | - Winrich A. Freiwald
- grid.134907.80000 0001 2166 1519Laboratory of Neural Systems, The Rockefeller University, 1230 York Avenue, New York, NY 10065 USA ,Center for Brains, Minds & Machines, Cambridge, MA USA
| |
Collapse
|
22
|
Gray OJ, McFarquhar M, Montaldi D. A reassessment of the pseudoneglect effect: Attention allocation systems are selectively engaged by semantic and spatial processing. J Exp Psychol Hum Percept Perform 2020; 47:223-237. [PMID: 33271044 PMCID: PMC7818672 DOI: 10.1037/xhp0000882] [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] [Indexed: 11/09/2022]
Abstract
Healthy individuals display systematic inaccuracies when allocating attention to perceptual space. Under many conditions, optimized spatial attention processing of the right hemisphere’s frontoparietal attention network directs more attention to the left side of perceptual space than the right. This is the pseudoneglect effect. We present evidence reshaping our fundamental understanding of this neural mechanism. We describe a previously unrecognized, but reliable, attention bias to the right side of perceptual space that is associated with semantic object processing. Using an object bisection task, we revealed a significant rightward bias distinct from the leftward bias elicited by the traditional line bisection task. In Experiment 2, object-like shapes that were not easily recognizable exhibited an attention bias between that of horizontal lines and objects. Our results support our proposal that the rightward attention bias is a product of semantic processing and its lateralization in the left hemisphere. In Experiment 3, our novel object-based adaptation of the landmark task further supported this proposition and revealed temporal dynamics of the effect. This research provides novel and crucial insight into the systems supporting intricate and complex attention allocation and provides impetus for a shift toward studying attention in ways that increasingly reflect our complex environments. This study describes a previously unrecognized but reliable spatial attention bias that is associated with the processing of the semantic meaning of objects. This counters the spatial attention bias well-known as the pseudoneglect effect. Our findings implicate a crucial role for the understudied left frontoparietal cortex in distributing attention, and open new, exciting areas for research. This work also reveals a mechanism that potentially enables our attention to be directed equally to different areas of space in daily life.
Collapse
Affiliation(s)
- Oliver J Gray
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, University of Manchester
| | - Martyn McFarquhar
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, University of Manchester
| | - Daniela Montaldi
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, University of Manchester
| |
Collapse
|
23
|
The correlation between apraxia and neglect in the right hemisphere: A voxel-based lesion-symptom mapping study in 138 acute stroke patients. Cortex 2020; 132:166-179. [DOI: 10.1016/j.cortex.2020.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 05/29/2020] [Accepted: 07/20/2020] [Indexed: 12/22/2022]
|
24
|
Gerrits R, Verhelst H, Vingerhoets G. Hemispheric dominance for visuospatial attention does not predict the direction of pseudoneglect. Neuropsychologia 2020; 148:107634. [PMID: 32998020 DOI: 10.1016/j.neuropsychologia.2020.107634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 11/28/2022]
Abstract
Pseudoneglect refers to a tendency of neurologically healthy individuals to produce leftward perceptual biases during spatial tasks, which is traditionally measured using line bisection tasks. This behavioral asymmetry is often explained as a consequence of right hemispheric dominance for visuospatial attention. The present study directly tested this notion by comparing line bisection performance between left-handers with either right hemispheric dominance (RVSD, N = 40) or "atypical" left hemispheric dominance (LVSD, N = 23) for visuospatial attention as determined by fMRI. Although we expected a reversal of pseudoneglect in participants with LVSD, our results show that they equally often err to the left of the true center compared to RVSD controls (74% of LVSD participants and 80% of RVSD participants). However, the magnitude of misbisections was found to be slightly, but significantly, smaller in the LVSD subgroup.We conclude that hemispheric asymmetry for visuospatial attention is not the main determinant of pseudoneglect as is commonly thought, but rather only constitutes one of the multiple factors which (subtly) contributes to its direction and magnitude.
Collapse
Affiliation(s)
- Robin Gerrits
- Department of Experimental Psychology, Ghent University, Henri Dunantlaan 2, Ghent, Belgium.
| | - Helena Verhelst
- Department of Experimental Psychology, Ghent University, Henri Dunantlaan 2, Ghent, Belgium
| | - Guy Vingerhoets
- Department of Experimental Psychology, Ghent University, Henri Dunantlaan 2, Ghent, Belgium; Ghent Institute for Functional and Metabolic Imaging (GIfMI), Ghent University, Belgium
| |
Collapse
|
25
|
Kanno S, Shinohara M, Kanno K, Gomi Y, Uchiyama M, Nishio Y, Baba T, Hosokai Y, Takeda A, Fukuda H, Mori E, Suzuki K. Neural substrates underlying progressive micrographia in Parkinson's disease. Brain Behav 2020; 10:e01669. [PMID: 32558361 PMCID: PMC7428504 DOI: 10.1002/brb3.1669] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 03/18/2020] [Accepted: 05/04/2020] [Indexed: 01/15/2023] Open
Abstract
INTRODUCTION The neural substrates associated with the development of micrographia remain unknown. We aimed to elucidate the neural substrates underlying micrographia in Parkinson's disease (PD) patients. METHODS Forty PD patients and 20 healthy controls underwent handwriting tests that involved free writing and copying. We measured the size of each letter and the resting cerebral glucose metabolic rate of the PD patients and another group of age- and sex-matched 14 healthy controls (HCs), who had not participated in the writing tests, using resting-state 18F-fluorodeoxyglucose positron emission tomography. RESULTS In the PD patients, the prevalence of consistent micrographia (CM) associated with free writing was 2.5% for both tasks. Alternatively, the prevalence of progressive micrographia (PM) was 15% for free writing and 17.5% for copying. In the PD patients, there was no significant difference in the letter sizes between these tasks, whereas the variability of the letter sizes for copying was significantly different from that for free writing. The means and decrements in letter sizes in either task were not significantly correlated with the severity of brady/hypokinesia in the PD patients. For free writing, the PD patients with PM showed glucose hypometabolism in the anterior part of the right middle cingulate cortex, including the rostral cingulate motor area, compared with those without PM. For copying, the PD patients with PM showed glucose hypometabolism in the right superior occipital gyrus, including V3A, compared with those without PM. CONCLUSIONS These findings suggest that PM in free writing in PD patients is caused by the difficulty of monitoring whether the actual handwriting movements are desirable for maintaining letter size during self-paced handwriting. By contrast, PM in copying in PD patients is evoked by a lack of visual information about the personal handwriting and hand motions that are used as cues for maintaining letter sizes.
Collapse
Affiliation(s)
- Shigenori Kanno
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
| | - Mayumi Shinohara
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
| | - Kasumi Kanno
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
| | - Yukihiro Gomi
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
- Department of Occupational TherapyInternational University of Health and WelfareNaritaJapan
| | - Makoto Uchiyama
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
- Department of Speech, Language, and Hearing SciencesNiigata University of Health and WelfareNiigataJapan
| | - Yoshiyuki Nishio
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
- Department of General PsychiatryTokyo Metropolitan Matsuzawa HospitalSetagayaJapan
| | - Toru Baba
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
- Department of NeurologySendai Nishitaga HospitalSendaiJapan
| | - Yoshiyuki Hosokai
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
- Department of Radiological ScienceInternational University of Health and WelfareOtawaraJapan
| | - Atsushi Takeda
- Department of NeurologySendai Nishitaga HospitalSendaiJapan
| | - Hiroshi Fukuda
- Department of Nuclear Medicine and RadiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
- Division of RadiologyTohoku Medical and Pharmaceutical UniversitySendaiJapan
| | - Etsuro Mori
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
- Department of Behavioural Neurology and Cognitive NeuropsychiatryOsaka University United Graduate School of Child DevelopmentSuitaJapan
| | - Kyoko Suzuki
- Department of Behavioural Neurology and Cognitive NeuroscienceTohoku University Graduate School of MedicineSendaiJapan
| |
Collapse
|
26
|
Iwański S, Leśniak M, Polanowska K, Bembenek J, Czepiel W, Seniów J. Neuronavigated 1 Hz rTMS of the left angular gyrus combined with visuospatial therapy in post-stroke neglect. NeuroRehabilitation 2020; 46:83-93. [PMID: 32039875 DOI: 10.3233/nre-192951] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Visuospatial neglect (VSN) may be caused by an inter-hemispheric imbalance of neural activity after brain injury. Repetitive transcranial magnetic stimulation (rTMS) allows rebalancing restoration to a certain degree, relieving neglect symptoms. OBJECTIVE This study investigates the therapeutic effect of 1 Hz rTMS applied over the left angular gyrus combined with visual scanning training in patients with left VSN in the subacute stroke phase. METHODS Twenty-eight patients with VSN were randomly assigned to either experimental (fifteen sessions of rTMS consisted of 1800 magnetic pulses delivered to the left angular gyrus with a neuronavigation control), or control group (fifteen sessions of sham stimulation), followed by visual scanning training. VSN severity was assessed both before and after treatment with a 3-month follow up employing the Behavioural Inattention Test and functional measures. RESULTS No statistically significant differences were detected in outcome measures between the rTMS and sham groups after completion of 3-week therapy and at 3-month follow up. The magnitude of stimulation effects was not associated either with lesion volume, its location, or baseline motor threshold. CONCLUSIONS Our study did not confirm efficacy of 1 Hz rTMS over the angular gyrus as an adjuvant method to visual scanning training in patients with VSN in the subacute stroke.
Collapse
Affiliation(s)
- Szczepan Iwański
- 2nd Department of Neurology, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Marcin Leśniak
- Institute of Psychology, University of Wroclaw, Wroclaw, Poland
| | - Katarzyna Polanowska
- 2nd Department of Neurology, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Jan Bembenek
- Department of Clinical Neurophysiology, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Wojciech Czepiel
- Vascular Laboratory, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Joanna Seniów
- 2nd Department of Neurology, Institute of Psychiatry and Neurology, Warsaw, Poland
| |
Collapse
|
27
|
Forkel SJ, Thiebaut de Schotten M. Towards metabolic disconnection - symptom mapping. Brain 2020; 143:718-721. [PMID: 32203573 DOI: 10.1093/brain/awaa060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This scientific commentary refers to ‘Metabolic lesion-deficit mapping of human cognition’ by Jha etal. (doi:10.1093/brain/awaa032).
Collapse
Affiliation(s)
- Stephanie J Forkel
- Brain Connectivity and Behaviour Laboratory, Sorbonne Universities, Paris, France.,Groupe d'Imagerie Neurofonctionnelle, Institut des Maladies Neurodégénératives-UMR 5293, CNRS, CEA University of Bordeaux, Bordeaux, France.,Centre for Neuroimaging Sciences, Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Michel Thiebaut de Schotten
- Brain Connectivity and Behaviour Laboratory, Sorbonne Universities, Paris, France.,Groupe d'Imagerie Neurofonctionnelle, Institut des Maladies Neurodégénératives-UMR 5293, CNRS, CEA University of Bordeaux, Bordeaux, France
| |
Collapse
|
28
|
Beume LA, Rijntjes M, Dressing A, Kaller CP, Hieber M, Martin M, Kirsch S, Kümmerer D, Urbach H, Umarova RM, Weiller C. Dissociation of visual extinction and neglect in the left hemisphere. Cortex 2020; 129:211-222. [PMID: 32505793 DOI: 10.1016/j.cortex.2020.04.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 04/05/2020] [Accepted: 04/06/2020] [Indexed: 11/27/2022]
Abstract
Visual neglect and extinction are two distinct visuospatial attention deficits that frequently occur after right hemisphere cerebral stroke. However, their different lesion profiles remain a matter of debate. In the left hemisphere, a domain-general dual-loop model with distinct computational abilities onto which several cognitive functions may project, has been proposed: a dorsal stream for sensori-motor mapping in time and space and a ventral stream for comprehension and representation of concepts. We wondered whether such a distinction may apply to visual extinction and neglect in left hemisphere lesions. Of 165 prospectively studied patients with acute left hemispheric ischemic stroke with a single lesion on MRI, 122 had no visuospatial attention deficit, 10 had extinction, 31 neglect and 2 had both, visual extinction and neglect. Voxel-based-lesion-symptom mapping (VLSM, FDR<.05) showed a clear anatomical dissociation. Extinction occurred after damage to the parietal cortex (anterior bank of the intraparietal sulcus, inferior parietal lobe, and supramarginal gyrus), while visual neglect occurred after damage mainly to the temporal lobe (superior and middle temporal lobe, anterior temporal pole), inferior ventral premotor cortex, frontal operculum, angular gyrus, and insula. Direct comparison of both conditions linked extinction to intraparietal sulcus and supramarginal gyrus (FDR<.05). Thus, in the left hemisphere extinction seems to be related to dorsal stream lesions, whereas neglect maps more on the ventral stream. These data cannot be generalized to the right hemisphere. However, a domain-general point-of-view may stimulate discussion on visuospatial attention processing also in the right hemisphere.
Collapse
Affiliation(s)
- Lena-Alexandra Beume
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany
| | - Michel Rijntjes
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany
| | - Andrea Dressing
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany
| | - Christoph P Kaller
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany
| | - Maren Hieber
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany
| | - Markus Martin
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany
| | - Simon Kirsch
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany
| | - Dorothee Kümmerer
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany
| | - Horst Urbach
- Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; Department of Neuroradiology, University Medical Center Freiburg, Freiburg, Germany
| | - Roza M Umarova
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany; Department of Neurology, Inselspital, Bern University Hospital, University of Bern, Switzerland
| | - Cornelius Weiller
- Department of Neurology and Neuroscience, University Medical Center Freiburg, Freiburg, Germany; Freiburg Brain Imaging Center, University Medical Center Freiburg, Freiburg, Germany; BrainLinks-BrainTools Cluster of Excellence, University Medical Center Freiburg, Freiburg, Germany.
| |
Collapse
|
29
|
Mirrored brain organization: Statistical anomaly or reversal of hemispheric functional segregation bias? Proc Natl Acad Sci U S A 2020; 117:14057-14065. [PMID: 32513702 DOI: 10.1073/pnas.2002981117] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Humans demonstrate a prototypical hemispheric functional segregation pattern, with language and praxis lateralizing to the left hemisphere and spatial attention, face recognition, and emotional prosody to the right hemisphere. In this study, we used fMRI to determine laterality for all five functions in each participant. Crucially, we recruited a sample of left-handers preselected for atypical (right) language dominance (n = 24), which allowed us to characterize hemispheric asymmetry of the other functions and compare their functional segregation pattern with that of left-handers showing typical language dominance (n = 39). Our results revealed that most participants with left language dominance display the prototypical pattern of functional hemispheric segregation (44%) or deviate from this pattern in only one function (35%). Similarly, the vast majority of right language dominant participants demonstrated a completely mirrored brain organization (50%) or a reversal for all but one cognitive function (32%). Participants deviating by more than one function from the standard segregation pattern showed poorer cognitive performance, in line with an oft-presumed biological advantage of hemispheric functional segregation.
Collapse
|
30
|
Feeling and Looking Down: Impact of Depressive Symptoms on the Allocation of Vertical Attention. Cogn Behav Neurol 2020; 33:137-144. [DOI: 10.1097/wnn.0000000000000232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
31
|
Boukrina O, Chen P, Budinoska T, Barrett A. Exploratory examination of lexical and neuroanatomic correlates of neglect dyslexia. Neuropsychology 2020; 34:404-419. [PMID: 31999167 PMCID: PMC7249258 DOI: 10.1037/neu0000619] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
OBJECTIVE This study examined lexical and neuroanatomic correlates of reading errors in individuals with spatial neglect, defined as a failure to respond to stimuli in the side of space opposite a brain lesion, causing functional disability. METHOD One-hundred and ten participants with left spatial neglect after right-hemisphere stroke read aloud a list of 36 words. Reading errors were scored as "contralesional" (error in the left half of the word) or as "other." The influence of lexical processing on neglect dyslexia was studied with a stepwise regression using word frequency, orthographic neighborhood (number of same length neighbors that differ by 1 letter), bigram and trigram counts (number of words with the same 2- and 3-letter combinations), length, concreteness, and imageability as predictors. MRI/CT images of 92 patients were studied in a voxelwise lesion-symptom analysis (VLSM). RESULTS Longer length and more trigram neighbors increased, while higher concreteness reduced, the rate of contralesional errors. VLSM revealed lesions in the inferior temporal sulcus, middle temporal and angular gyri, precuneus, temporal pole, and temporo-parietal white matter associated with the rate of contralesional errors. CONCLUSIONS Orthographic competitors may decrease word salience, while semantic concreteness may help constrain the selection of available word options when it is based on degraded information from the left side of the word. (PsycInfo Database Record (c) 2020 APA, all rights reserved).
Collapse
Affiliation(s)
- Olga Boukrina
- Center for Stroke Rehabilitation Research, Kessler Foundation, West Orange, NJ
- Department of Physical Medicine & Rehabilitation, Rutgers New Jersey Medical School, Newark, NJ
| | - Peii Chen
- Center for Stroke Rehabilitation Research, Kessler Foundation, West Orange, NJ
- Department of Physical Medicine & Rehabilitation, Rutgers New Jersey Medical School, Newark, NJ
| | - Tamara Budinoska
- Center for Stroke Rehabilitation Research, Kessler Foundation, West Orange, NJ
| | - A.M. Barrett
- Center for Visual & Neurocognitive Rehabilitation, Atlanta VA Medical Center, Decatur, GA
- Department of Neurology, Emory University School of Medicine, Atlanta, GA
| |
Collapse
|
32
|
Suarez A, Saxena S, Oishi K, Oishi K, Walker A, Rorden C, Hillis AE. Influence of age, lesion volume, and damage to dorsal versus ventral streams to viewer- and stimulus-centered hemispatial neglect in acute right hemisphere stroke. Cortex 2020; 126:73-82. [PMID: 32062471 PMCID: PMC7201372 DOI: 10.1016/j.cortex.2019.12.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 11/04/2019] [Accepted: 12/10/2019] [Indexed: 11/21/2022]
Abstract
We studied 156 individuals with acute, right hemisphere ischemic stroke on a battery of hemispatial neglect tests to distinguish between viewer-centered and stimulus-centered neglect and MRI diffusion weighted imaging. We identified the relative contributions of age, total lesion volume, and damage to subcortical and cortical grey matter regions as well as white matter tracts to both the severity and presence of significant viewer-centered and stimulus-centered neglect, using multivariable regression tests. We found that age, volume of lesion, and percent damage to the regions of interest were each independently associated with the severity of viewer-centered neglect (r2 = .31; p < .0001). However, only age (t = 3.20; p = .002) and percent damage to the angular gyrus (t = 2.63, p = .010), a dorsal stream area, predicted severity of viewer-centered neglect independently of the other variables. The same variables predicted the presence of significant viewer-centered neglect. In contrast, these variables did not significantly predict the severity of stimulus-centered neglect. However, we found that percent damage to ventral stream regions of interest (middle temporal gyrus, inferior temporal gyrus, fusiform gyrus, inferior frontal occipital gyrus, sagittal stratum, along with total infarct volume were associated with the presence of significant stimulus-centered neglect (pseudo r2 = .70, p < .0004). Only percent damage to right inferior temporal gyrus predicted stimulus-centered neglect independently of the other variables (p = .018).
Collapse
Affiliation(s)
- Adrian Suarez
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sadhvi Saxena
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kenichi Oishi
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Center for Imaging Science, Johns Hopkins University, Baltimore, MD, USA; Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Kumiko Oishi
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Center for Imaging Science, Johns Hopkins University, Baltimore, MD, USA; Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Alexandra Walker
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Chris Rorden
- Department of Psychology, University of South Carolina, Columbia, SC, USA
| | - Argye E Hillis
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Cognitive Science, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD, USA.
| |
Collapse
|
33
|
Bourgeois A, Guedj C, Carrera E, Vuilleumier P. Pulvino-cortical interaction: An integrative role in the control of attention. Neurosci Biobehav Rev 2020; 111:104-113. [DOI: 10.1016/j.neubiorev.2020.01.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/02/2019] [Accepted: 01/04/2020] [Indexed: 11/25/2022]
|
34
|
Brain response to food brands correlates with increased intake from branded meals in children: an fMRI study. Brain Imaging Behav 2020; 13:1035-1048. [PMID: 29971684 DOI: 10.1007/s11682-018-9919-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Food branding is ubiquitous, however, not all children are equally susceptible to its effects. The objectives of this study were to 1) determine whether food brands evoke differential response than non-food brands in brain areas related to motivation and inhibitory control using blood oxygen level dependent (BOLD) functional magnetic resonance imaging (fMRI) and 2) determine the association between brain response and energy intake at test-meals presented with or without brands. Twenty-eight 7-10 year-old children completed four visits as part of a within-subjects design where they consumed three multi-item test-meals presented with familiar food brands, novel food brand, and no brand. On the fourth visit an fMRI was performed where children passively viewed food brands, non-food brands and control images. A whole-brain analysis was conducted to compare BOLD response between conditions. Pearson's correlations were calculated to determine the association between brain response and meal intake. Relative to non-food brands, food brand images were associated with increased activity in the right lingual gyrus. Relative to control, food and non-food brand images were associated with greater response in bilateral fusiform gyri and decreased response in the cuneus, precuneus, lingual gyrus, and supramarginal gyrus. Less activation in the bilateral fusiform gyrus to both food and non-food brands was associated with greater energy intake of the branded vs unbranded meal. These findings may help explain differences in the susceptibility to the intake-promoting effects of food advertising in children.
Collapse
|
35
|
Zebhauser PT, Vernet M, Unterburger E, Brem AK. Visuospatial Neglect - a Theory-Informed Overview of Current and Emerging Strategies and a Systematic Review on the Therapeutic Use of Non-invasive Brain Stimulation. Neuropsychol Rev 2019; 29:397-420. [PMID: 31748841 PMCID: PMC6892765 DOI: 10.1007/s11065-019-09417-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 09/27/2019] [Indexed: 01/12/2023]
Abstract
Visuospatial neglect constitutes a supramodal cognitive deficit characterized by reduction or loss of spatial awareness for the contralesional space. It occurs in over 40% of right- and 20% of left-brain-lesioned stroke patients with lesions located mostly in parietal, frontal and subcortical brain areas. Visuospatial neglect is a multifaceted syndrome - symptoms can be divided into sensory, motor and representational neglect - and therefore requires an individually adapted diagnostic and therapeutic approach. Several models try to explain the origins of visuospatial neglect, of which the "interhemispheric rivalry model" is strongly supported by animal and human research. This model proposes that allocation of spatial attention is balanced by transcallosal inhibition and both hemispheres compete to direct attention to the contralateral hemi-space. Accordingly, a brain lesion causes an interhemispheric imbalance, which may be re-installed by activation of lesioned, or deactivation of unlesioned (over-activated) brain areas through noninvasive brain stimulation. Research in larger patient samples is needed to confirm whether noninvasive brain stimulation can improve long-term outcomes and whether these also affect activities of daily living and discharge destination.
Collapse
Affiliation(s)
- Paul Theo Zebhauser
- Department of Neuropsychology, Max-Planck Institute of Psychiatry, Kraepelinstrasse 2-10, 80804, Munich, Germany.,Department of Psychiatry and Psychotherapy, Klinikum Rechts der Isar der Technischen Universität, Munich, Germany
| | - Marine Vernet
- Section on Neurocircuitry, Laboratory of Brain and Cognition, NIMH/NIH, Bethesda, MD, USA
| | - Evelyn Unterburger
- Division of Neuropsychology, Universitätsklinik Zürich USZ, Frauenklinikstrasse 26, Zurich, Switzerland
| | - Anna-Katharine Brem
- Department of Neuropsychology, Max-Planck Institute of Psychiatry, Kraepelinstrasse 2-10, 80804, Munich, Germany. .,Berenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| |
Collapse
|
36
|
Lucas N, Bourgeois A, Carrera E, Landis T, Vuilleumier P. Impaired visual search with paradoxically increased facilitation by emotional features after unilateral pulvinar damage. Cortex 2019; 120:223-239. [PMID: 31336355 DOI: 10.1016/j.cortex.2019.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 05/13/2019] [Accepted: 06/07/2019] [Indexed: 12/23/2022]
Abstract
Posterior thalamic pulvinar nuclei have been implicated in different aspects of spatial attention, but their exact role in humans remain unclear. Most neuropsychological studies of attention deficits after pulvinar lesion have concerned single patients or small samples. Here we examined a group of 13 patients with focal damage to posterior thalamus on a visual search task with faces, allowing us to test several hypotheses concerning pulvinar function in controlling attention to visually salient or emotionally significant stimuli. Our results identified two subgroups of thalamic patients with distinct patterns of attentional responsiveness to emotional and colour features in face targets. One group with lesions located in anterior and ventral portions of thalamus showed intact performance, with a normal facilitation of visual search for faces with emotional (fearful or happy) expressions on both side of space, similar to healthy controls. By contrast, a second group showed a slower and poorer detection of face targets, most severe for neutral faces, but with a paradoxically enhanced facilitation by both colour and emotional features. This second group had lesions centred on the pulvinar, involving mainly the dorso-medial sectors in patients showing enhanced effects of colour features, but extending to more dorso-lateral sectors in those with enhanced effects of emotional features. These findings reveal that pulvinar nuclei are not critical for orienting attention to emotionally or visually salient features, but instead provide new evidence in support of previous hypotheses suggesting an important role in controlling attention in visual scenes with distracting information.
Collapse
Affiliation(s)
- Nadia Lucas
- Neuroscience Department, Laboratory for Behavioral Neurology and Imaging of Cognition, University of Geneva, Geneva, Switzerland
| | - Alexia Bourgeois
- Neuroscience Department, Laboratory for Behavioral Neurology and Imaging of Cognition, University of Geneva, Geneva, Switzerland; Neurology Department, University Hospital of Geneva, Geneva, Switzerland; Laboratory of Cognitive Neurorehabilitation, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
| | - Emmanuel Carrera
- Neurology Department, University Hospital of Geneva, Geneva, Switzerland
| | - Theodor Landis
- Neurology Department, University Hospital of Geneva, Geneva, Switzerland
| | - Patrik Vuilleumier
- Neuroscience Department, Laboratory for Behavioral Neurology and Imaging of Cognition, University of Geneva, Geneva, Switzerland; Neurology Department, University Hospital of Geneva, Geneva, Switzerland
| |
Collapse
|
37
|
Chen P, Motisi SE, Cording C, Ward I, Jasey NN. Impact of eliminating visual input on sitting posture and head position in a patient with spatial neglect following cerebral hemorrhage: a case report. Physiother Theory Pract 2019; 37:852-861. [PMID: 31319732 DOI: 10.1080/09593985.2019.1645252] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Background: Spatial neglect is a neurocognitive syndrome. Affected individuals pay little or insufficient attention to the space contralateral to the injured cerebral hemisphere, often resulting in or exacerbating disability following an acquired brain injury. Eliminating visual input may increase attention toward the contralesional side of space, and improve symptoms of spatial neglect; however this has never been examined in a clinical setting. Objective: In this case report, we observed an individual demonstrate immediate and spontaneous postural changes once visual input was eliminated. Methods: The patient, a 53-year-old female, was admitted to a rehabilitation hospital after hemorrhagic stroke affecting her right basal ganglia and surrounding regions in the frontal lobe. She exhibited left-sided spasticity, severe right gaze preference, and stark rightward postural deviation. Neck passive range of motion was normal. Visual field integrity was inconclusive due to poor communication and impaired cognitive function. Contraversive pushing was ruled out. Results:Once visual input was eliminated by applying a blindfold, the patient turned to the left spontaneously, had more buttock contact on the left, and placed more weight toward the left side in a sitting posture. However, she returned to rightward deviation three minutes after blindfold removal. In addition, the patient's rehabilitation team reported that she was able to participate in more therapy activities with binocular occlusion than with eyes open. Conclusion: Binocular occlusion appeared to demonstrate an immediate, albeit transient, improvement in postural symmetry. The results warrant further research and exploration in clinical applicability.
Collapse
Affiliation(s)
- Peii Chen
- Center for Stroke Rehabilitation Research, Kessler Foundation, West Orange, NJ, USA.,Department of Physical Medicine and Rehabilitation, Rutgers University - New Jersey Medical School, Newark, NJ, USA
| | | | | | - Irene Ward
- Department of Physical Medicine and Rehabilitation, Rutgers University - New Jersey Medical School, Newark, NJ, USA.,Kessler Institute for Rehabilitation, West Orange, NJ, USA
| | - Neil N Jasey
- Department of Physical Medicine and Rehabilitation, Rutgers University - New Jersey Medical School, Newark, NJ, USA.,Kessler Institute for Rehabilitation, West Orange, NJ, USA
| |
Collapse
|
38
|
Gajardo-Vidal A, Lorca-Puls DL, Hope TMH, Parker Jones O, Seghier ML, Prejawa S, Crinion JT, Leff AP, Green DW, Price CJ. How right hemisphere damage after stroke can impair speech comprehension. Brain 2019; 141:3389-3404. [PMID: 30418586 PMCID: PMC6262220 DOI: 10.1093/brain/awy270] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 09/12/2018] [Indexed: 12/17/2022] Open
Abstract
Acquired language disorders after stroke are strongly associated with left hemisphere damage. When language difficulties are observed in the context of right hemisphere strokes, patients are usually considered to have atypical functional anatomy. By systematically integrating behavioural and lesion data from brain damaged patients with functional MRI data from neurologically normal participants, we investigated when and why right hemisphere strokes cause language disorders. Experiment 1 studied right-handed patients with unilateral strokes that damaged the right (n = 109) or left (n = 369) hemispheres. The most frequently impaired language task was: auditory sentence-to-picture matching after right hemisphere strokes; and spoken picture description after left hemisphere strokes. For those with auditory sentence-to-picture matching impairments after right hemisphere strokes, the majority (n = 9) had normal performance on tests of perceptual (visual or auditory) and linguistic (semantic, phonological or syntactic) processing. Experiment 2 found that these nine patients had significantly more damage to dorsal parts of the superior longitudinal fasciculus and the right inferior frontal sulcus compared to 75 other patients who also had right hemisphere strokes but were not impaired on the auditory sentence-to-picture matching task. Damage to these right hemisphere regions caused long-term speech comprehension difficulties in 67% of patients. Experiments 3 and 4 used functional MRI in two groups of 25 neurologically normal individuals to show that within the regions identified by Experiment 2, the right inferior frontal sulcus was normally activated by (i) auditory sentence-to-picture matching; and (ii) one-back matching when the demands on linguistic and non-linguistic working memory were high. Together, these experiments demonstrate that the right inferior frontal cortex contributes to linguistic and non-linguistic working memory capacity (executive function) that is needed for normal speech comprehension. Our results link previously unrelated literatures on the role of the right inferior frontal cortex in executive processing and the role of executive processing in sentence comprehension; which in turn helps to explain why right inferior frontal activity has previously been reported to increase during recovery of language function after left hemisphere stroke. The clinical relevance of our findings is that the detrimental effect of right hemisphere strokes on language is (i) much greater than expected; (ii) frequently observed after damage to the right inferior frontal sulcus; (iii) task dependent; (iv) different to the type of impairments observed after left hemisphere strokes; and (v) can result in long-lasting deficits that are (vi) not the consequence of atypical language lateralization.
Collapse
Affiliation(s)
- Andrea Gajardo-Vidal
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, UK.,Faculty of Health Sciences, Universidad del Desarrollo, Concepcion, Chile
| | - Diego L Lorca-Puls
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, UK
| | - Thomas M H Hope
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, UK
| | | | - Mohamed L Seghier
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, UK.,Cognitive Neuroimaging Unit, Emirates College for Advanced Education, Abu Dhabi, UAE
| | - Susan Prejawa
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Jennifer T Crinion
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Alex P Leff
- Institute of Cognitive Neuroscience, University College London, London, UK.,Department of Brain Repair and Rehabilitation, UCL Queen Square Institute of Neurology, London, UK
| | - David W Green
- Experimental Psychology, Faculty of Brain Sciences, University College London, London, UK
| | - Cathy J Price
- Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London, UK
| |
Collapse
|
39
|
Dadia S, Shinde C, Desai R, Mahajan AG, Sharma S, Singh B, Bharti S. Ocular manifestations in patients with cerebrovascular accidents in India: a cross-sectional observational study. Int Ophthalmol 2019; 39:2843-2849. [PMID: 31129750 DOI: 10.1007/s10792-019-01131-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 05/22/2019] [Indexed: 01/10/2023]
Abstract
PURPOSE To assess ophthalmic manifestations in patients with stroke and emphasize the importance of a formal screening for visual problems in stroke patients in hospital and rehabilitation settings. METHODS This was a cross-sectional study of 50 newly diagnosed patients with stroke with Glasgow Coma Scale (GCS) > 8 examined within 3 days of onset. A detailed ophthalmic examination was performed for each patient including visual acuity, fields, ocular motility, slit lamp and fundus examination, line bisection tests and cranial nerve assessment. Radiological investigations were reviewed and anatomically correlated. RESULTS A total of 50 patients (41 male and nine female) were included in the study. Mean age of the stroke cohort was 51.36 years. Twenty-nine patients (58%) had a subcortical stroke, while 42% (n = 21) patients had a cortical stroke. Nineteen patients (38%) demonstrated visual field defects. Twenty-one patients (42%) had a gaze palsy. Vertical gaze palsy (n = 8) was more common in cortical stroke, while internuclear ophthalmoplegia (n = 2), horizontal gaze palsies (n = 4) and Parinaud's syndrome (n = 1) were seen more commonly in those with subcortical stroke. Twenty-four percent (n = 12) patients had nystagmus. Twelve percent (n = 6) patients had diplopia. Thirty-eight percent (n = 19) patients had convergence insufficiency. Sixteen patients (32%) complained of visual impairment. Retinal abnormalities were seen in 58% (n = 29) of patients. CONCLUSIONS Ophthalmic manifestations were seen in 90% of stroke survivors. Their presence in majority of the patients in our cohort suggests that earliest routine ophthalmic examination should be mandatory in all patients with acute stroke.
Collapse
Affiliation(s)
- Suchit Dadia
- Lokmanya Tilak Municipal Medical College and Hospital, Mumbai, India. .,Bharti Eye Foundation and Hospitals, New Delhi, India.
| | - Chhaya Shinde
- Lokmanya Tilak Municipal Medical College and Hospital, Mumbai, India
| | - Roshani Desai
- Lokmanya Tilak Municipal Medical College and Hospital, Mumbai, India.,Roshani-I Care, Jogeshwari West, Mumbai, India
| | | | | | - Bhupesh Singh
- Bharti Eye Foundation and Hospitals, New Delhi, India
| | | |
Collapse
|
40
|
Allocentric Versus Egocentric Neglect in Stroke Patients: A Pilot Study Investigating the Assessment of Neglect Subtypes and Their Impacts on Functional Outcome Using Eye Tracking. J Int Neuropsychol Soc 2019; 25:479-489. [PMID: 30837021 DOI: 10.1017/s1355617719000110] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Few studies have investigated the assessment and functional impact of egocentric and allocentric neglect among stroke patients. This pilot study aimed to determine (1) whether allocentric and egocentric neglect could be dissociated among a sample of stroke patients using eye tracking; (2) the specific patterns of attention associated with each subtype; and (3) the nature of the relationship between neglect subtype and functional outcome. METHOD Twenty acute stroke patients were administered neuropsychological assessment batteries, a pencil-and-paper Apples Test to measure neglect subtype, and an adaptation of the Apples Test with an eye tracking measure. To test clinical discriminability, twenty age- and education-matched control participants were administered the eye tracking measure of neglect. RESULTS The eye tracking measure identified a greater number of individuals as having egocentric and/or allocentric neglect than the pencil-and-paper Apples Test. Classification of neglect subtype based on eye tracking performance was a significant predictor of functional outcome beyond that accounted for by the neuropsychological test performance and Apples Test neglect classification. Preliminary evidence suggests that patients with no neglect symptoms had superior functional outcomes compared with patients with neglect. Patients with combined egocentric and allocentric neglect had poorer functional outcomes than those with either subtype. Functional outcomes of patients with either allocentric or egocentric neglect did not differ significantly. The applications of our findings, to improve neglect detection, are discussed. CONCLUSION Results highlight the potential clinical utility of eye tracking for the assessment and identification of neglect subtype among stroke patients to predict functional outcomes. (JINS, 2019, 25, 479-489).
Collapse
|
41
|
DeDios-Stern S, Durkin NM, Soble JR. Case of right hemispatial neglect and transcortical sensory aphasia following left occipitotemporoparietal glioblastoma resection. APPLIED NEUROPSYCHOLOGY-ADULT 2019; 28:117-123. [PMID: 30987454 DOI: 10.1080/23279095.2019.1590357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The neurobehavioral syndrome of hemispatial neglect, which can result from insults such as stroke, brain tumor, or head injury, has most frequently been described as occurring for the left-side of hemispace following lesions to the right hemisphere. While right hemispatial neglect/inattention may occur following left hemisphere lesions as well, it has received limited attention in the scientific literature. The present case describes an inpatient neuropsychological evaluation with a 67-year-old, African American man presenting with right hemispatial neglect following resection of a large glioblastoma in the left occipitotemporoparietal region. The evaluation included a clinical interview, neurobehavioral status examination, and a battery of neuropsychological tests. Results documented consistent evidence of right hemispatial neglect across the administered tests, which could not be attributed to an established right visual field cut. Neuropsychological testing also revealed nearly global deficits in complex visuoperception, posterior/receptive language, memory, and complex attention/executive functioning abilities, while basic attention remained intact. Further remarkable findings of this case included color anomia and transcortical sensory aphasia. Findings from the case are discussed in the context of the preexisting literature on hemispatial neglect and the theoretical specialization of the parietal lobe for spatial attention/awareness.
Collapse
Affiliation(s)
- Samantha DeDios-Stern
- Department of Psychiatry, University of Illinois College of Medicine, Chicago, Illinois, USA
| | - Nicole M Durkin
- Department of Psychiatry, University of Illinois College of Medicine, Chicago, Illinois, USA
| | - Jason R Soble
- Department of Psychiatry, University of Illinois College of Medicine, Chicago, Illinois, USA.,Department of Neurology, University of Illinois College of Medicine, Chicago, Illinois, USA
| |
Collapse
|
42
|
Lateral parietal cortex in the generation of behavior: Implications for apathy. Prog Neurobiol 2019; 175:20-34. [DOI: 10.1016/j.pneurobio.2018.12.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 11/20/2018] [Accepted: 12/23/2018] [Indexed: 11/21/2022]
|
43
|
Leem MJ, Moon HI, Yoon SY, Lee HJ, Nam JS. Lesions Responsible for Impaired Visual Perception in Poststroke Patients Using Voxel-Based Lesion Symptom Mapping. Clin Anat 2019; 32:689-696. [PMID: 30873643 DOI: 10.1002/ca.23373] [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: 01/01/2019] [Revised: 03/04/2019] [Accepted: 03/13/2019] [Indexed: 11/11/2022]
Abstract
We aimed to clarify the clinical characteristics that affect visual perception (VP) and elucidate lesion locations correlated with impaired VP. We reviewed 61 patients with stroke. Clinical assessments of a motor-free VP test were used to evaluate VP after stroke. Regression analyses were performed to examine predictors of impaired VP. We generated statistical maps of lesions related to impaired VP using voxel-based lesion symptom mapping (VLSM). The group of patients who had right hemispheric lesions had significantly low VP function. In a regression model, impaired VP was predicted by cognitive function, age, lesion volume, and right hemispheric lesion. Using VLSM, we found lesion location associated with impaired VP after adjusting for age, lesion volume, and Korean version of mini mental status exam. The results showed a lesion pattern with predominant distribution in the right parietal lobe and deep white matter. Age, lesion volume, and cognitive impairment affected the results of VP tests. Even after adjustments, we found that lesions responsible for impaired VP were located in the right parietal lobe and deep white matter. This result confirmed right hemispheric dominance for VP using VLSM. Clin. Anat. 32:689-696, 2019. © 2019 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Min Jeong Leem
- Department of Rehabilitation Medicine, Bundang Jesaeng General Hospital, Seoungnam-si, Republic of Korea
| | - Hyun Im Moon
- Department of Rehabilitation Medicine, Bundang Jesaeng General Hospital, Seoungnam-si, Republic of Korea
| | - Seo Yeon Yoon
- Department of Rehabilitation Medicine, Bundang Jesaeng General Hospital, Seoungnam-si, Republic of Korea
| | - Hyo Jeong Lee
- Department of Rehabilitation Medicine, Bundang Jesaeng General Hospital, Seoungnam-si, Republic of Korea
| | - Je-Shik Nam
- Department of Rehabilitation Medicine, Bundang Jesaeng General Hospital, Seoungnam-si, Republic of Korea
| |
Collapse
|
44
|
Wang C, Miao P, Liu J, Wei S, Guo Y, Li Z, Zheng D, Cheng J. Cerebral blood flow features in chronic subcortical stroke: Lesion location-dependent study. Brain Res 2019; 1706:177-183. [DOI: 10.1016/j.brainres.2018.11.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 11/07/2018] [Accepted: 11/08/2018] [Indexed: 02/07/2023]
|
45
|
Salillas E, Korostenskaja M, Kleineschay T, Mehta S, Vega A, Castillo EM. A MEG Study on the Processing of Time and Quantity: Parietal Overlap but Functional Divergence. Front Psychol 2019; 10:139. [PMID: 30778314 PMCID: PMC6369182 DOI: 10.3389/fpsyg.2019.00139] [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: 09/03/2018] [Accepted: 01/15/2019] [Indexed: 11/16/2022] Open
Abstract
A common magnitude system for the processing of time and numerosity, supported by areas in the posterior parietal cortex, has been proposed by some authors. The present study aims to investigate possible intersections between the neural processing of non-numerical (time) and numerical magnitudes in the posterior parietal lobe. Using Magnetoencephalography for the comparison of brain source activations during the processing of duration and numerosity contrasts, we demonstrate parietal overlap as well as dissociations between these two dimensions. Within the parietal cortex, the main areas of overlap were bilateral precuneus, bilateral intraparietal sulci, and right supramarginal gyrus. Interestingly, however, these regions did not equivalently correlated with the behavior for the two dimensions: left and right precuneus together with the right supramarginal gyrus accounted functionally for durational judgments, whereas numerosity judgments were accounted by the activation pattern in the right intraparietal sulcus. Present results, indeed, demonstrate an overlap between the neural substrates for processing duration and quantity. However, the functional relevance of parietal overlapping areas for each dimension is not the same. In fact, our data indicates that the same parietal sites rule differently non-numerical and numerical dimensions, as parts of broader networks.
Collapse
Affiliation(s)
- Elena Salillas
- Department of Neurosciences, University of Padova, Padova, Italy
| | - Milena Korostenskaja
- Functional Brain Mapping and Brain Computer Interface Laboratory, Florida Hospital for Children, Orlando, FL, United States.,MEG Lab, Florida Hospital for Children, Orlando, FL, United States.,Florida Epilepsy Center, Florida Hospital, Orlando, FL, United States
| | - Tara Kleineschay
- MEG Lab, Florida Hospital for Children, Orlando, FL, United States.,Florida Epilepsy Center, Florida Hospital, Orlando, FL, United States
| | - Shivani Mehta
- Functional Brain Mapping and Brain Computer Interface Laboratory, Florida Hospital for Children, Orlando, FL, United States
| | - Alexandra Vega
- Functional Brain Mapping and Brain Computer Interface Laboratory, Florida Hospital for Children, Orlando, FL, United States
| | - Eduardo Martinez Castillo
- MEG Lab, Florida Hospital for Children, Orlando, FL, United States.,Florida Epilepsy Center, Florida Hospital, Orlando, FL, United States
| |
Collapse
|
46
|
Bogadhi AR, Bollimunta A, Leopold DA, Krauzlis RJ. Spatial Attention Deficits Are Causally Linked to an Area in Macaque Temporal Cortex. Curr Biol 2019; 29:726-736.e4. [PMID: 30773369 DOI: 10.1016/j.cub.2019.01.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 12/23/2018] [Accepted: 01/11/2019] [Indexed: 11/28/2022]
Abstract
Spatial neglect is a common clinical syndrome involving disruption of the brain's attention-related circuitry, including the dorsocaudal temporal cortex. In macaques, the attention deficits associated with neglect can be readily modeled, but the absence of evidence for temporal cortex involvement has suggested a fundamental difference from humans. To map the neurological expression of neglect-like attention deficits in macaques, we measured attention-related fMRI activity across the cerebral cortex during experimental induction of neglect through reversible inactivation of the superior colliculus and frontal eye fields. During inactivation, monkeys exhibited hallmark attentional deficits of neglect in tasks using either motion or non-motion stimuli. The behavioral deficits were accompanied by marked reductions in fMRI attentional modulation that were strongest in a small region on the floor of the superior temporal sulcus; smaller reductions were also found in frontal eye fields and dorsal parietal cortex. Notably, direct inactivation of the mid-superior temporal sulcus (STS) cortical region identified by fMRI caused similar neglect-like spatial attention deficits. These results identify a putative macaque homolog to temporal cortex structures known to play a central role in human neglect.
Collapse
Affiliation(s)
- Amarender R Bogadhi
- Laboratory of Sensorimotor Research, National Eye Institute, NIH, Bethesda, MD 20892, USA.
| | - Anil Bollimunta
- Laboratory of Sensorimotor Research, National Eye Institute, NIH, Bethesda, MD 20892, USA
| | - David A Leopold
- Laboratory of Neuropsychology, National Institute of Mental Health, NIH, Bethesda, MD 20892, USA; Neurophysiology Imaging Facility, National Institute of Mental Health, National Institute of Neurological Disorders and Stroke, National Eye Institute, NIH, Bethesda, MD 20892, USA
| | - Richard J Krauzlis
- Laboratory of Sensorimotor Research, National Eye Institute, NIH, Bethesda, MD 20892, USA.
| |
Collapse
|
47
|
Karnath HO, Sperber C, Rorden C. Reprint of: Mapping human brain lesions and their functional consequences. Neuroimage 2019; 190:4-13. [PMID: 30686616 DOI: 10.1016/j.neuroimage.2019.01.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/10/2017] [Accepted: 10/13/2017] [Indexed: 12/17/2022] Open
Abstract
Neuroscience has a long history of inferring brain function by examining the relationship between brain injury and subsequent behavioral impairments. The primary advantage of this method over correlative methods is that it can tell us if a certain brain region is necessary for a given cognitive function. In addition, lesion-based analyses provide unique insights into clinical deficits. In the last decade, statistical voxel-based lesion behavior mapping (VLBM) emerged as a powerful method for understanding the architecture of the human brain. This review illustrates how VLBM improves our knowledge of functional brain architecture, as well as how it is inherently limited by its mass-univariate approach. A wide array of recently developed methods appear to supplement traditional VLBM. This paper provides an overview of these new methods, including the use of specialized imaging modalities, the combination of structural imaging with normative connectome data, as well as multivariate analyses of structural imaging data. We see these new methods as complementing rather than replacing traditional VLBM, providing synergistic tools to answer related questions. Finally, we discuss the potential for these methods to become established in cognitive neuroscience and in clinical applications.
Collapse
Affiliation(s)
- Hans-Otto Karnath
- Centre of Neurology, Division of Neuropsychology, Hertie-Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany; Department of Psychology, University of South Carolina, Columbia, SC 29208, USA.
| | - Christoph Sperber
- Centre of Neurology, Division of Neuropsychology, Hertie-Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Christopher Rorden
- Department of Psychology, University of South Carolina, Columbia, SC 29208, USA
| |
Collapse
|
48
|
Impairments of Visuospatial Attention in Children with Unilateral Spastic Cerebral Palsy. Neural Plast 2018; 2018:1435808. [PMID: 30647728 PMCID: PMC6311787 DOI: 10.1155/2018/1435808] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/10/2018] [Accepted: 09/17/2018] [Indexed: 12/20/2022] Open
Abstract
Aim This observational study aimed at assessing the prevalence of visuospatial attention deficits in children with unilateral spastic cerebral palsy (USCP), taking into consideration the affected hemibody and the localization of the brain lesion. Method Seventy-five children with USCP were assessed with four visuospatial attention tests: star cancellation, Ogden figure copy, line bisection, and proprioceptive pointing. Results A majority (64%) of children with USCP presented a deficit in at least one test compared to the reference values. The alterations observed in children with left or right USCP were related to egocentric or allocentric neglect, respectively. Children with cortico/subcortical lesion presented more often visuospatial attention deficits than children with periventricular lesion. Visuospatial attention deficits were not associated with brain lesion locations. Interpretation Visuospatial attention deficits are prevalent in children with USCP and should be taken into account during their rehabilitation process. The present results shed new light on the interpretation of motor impairments in children with USCP as they may be influenced by the frequent presence of visuospatial deficits.
Collapse
|
49
|
Bloechle J, Huber S, Klein E, Bahnmueller J, Moeller K, Rennig J. Neuro-cognitive mechanisms of global Gestalt perception in visual quantification. Neuroimage 2018; 181:359-369. [DOI: 10.1016/j.neuroimage.2018.07.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 07/06/2018] [Accepted: 07/12/2018] [Indexed: 10/28/2022] Open
|
50
|
Vingerhoets G, Gerrits R, Bogaert S. Atypical brain functional segregation is more frequent in situs inversus totalis. Cortex 2018; 106:12-25. [DOI: 10.1016/j.cortex.2018.04.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 02/20/2018] [Accepted: 04/26/2018] [Indexed: 12/14/2022]
|