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Hiraumi H, Oikawa SI, Shiga K, Sato H. Systemic cisplatin increases the number of patients showing positive off-frequency masking audiometry. PLoS One 2023; 18:e0287400. [PMID: 37410731 PMCID: PMC10325046 DOI: 10.1371/journal.pone.0287400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 06/05/2023] [Indexed: 07/08/2023] Open
Abstract
OBJECTIVE The study aimed to evaluate the effect of systemic cisplatin administration on off-frequency masking audiometry. METHODS Among 26 patients receiving systemic cisplatin, 48 ears were included in the analysis. All patients underwent pure-tone audiometry with ipsilateral narrow-band masking noise (off-frequency masking audiometry). In the off-frequency masking audiometry, 70 dBHL band-pass noise (center frequency 1000 Hz, 1/3 octave bandwidth) was administered to the tested ear. The acquired thresholds were compared to those of standard pure-tone audiometry, and threshold elevations greater than 10 dB were regarded as significant. The number of patients showing abnormal threshold elevation was compared between before and after the cisplatin administration. RESULTS Before cisplatin administration, 91.7, 93.8, 97.9, and 93.8% of ears showed normal off-frequency masking audiometry outcomes at 125, 250, 6000, and 8000 Hz, respectively. After cisplatin administration, a higher number of patients showed abnormal off-frequency masking audiometry outcomes. This change was more prominent with increasing doses of cisplatin. After the cisplatin administration of 100∼200 mg/m2, the prevalence of patients with normal off-frequency masking audiometry outcomes was 77.3, 70.5, 90.9, and 88.6% at 125, 250, 6000, and 8000 Hz, respectively. At 250 Hz, the change was statistically significant (p = 0.01, chi-squared test).
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Affiliation(s)
- Harukazu Hiraumi
- Department of Otolaryngology—Head and Neck Surgery, Iwate Medical University, Yahaba, Shiwa, Iwate, Japan
| | - Shin-ichi Oikawa
- Department of Otolaryngology—Head and Neck Surgery, Iwate Medical University, Yahaba, Shiwa, Iwate, Japan
| | - Kiyoto Shiga
- Department of Otolaryngology—Head and Neck Surgery, Iwate Medical University, Yahaba, Shiwa, Iwate, Japan
| | - Hiroaki Sato
- Department of Otolaryngology—Head and Neck Surgery, Iwate Medical University, Yahaba, Shiwa, Iwate, Japan
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2
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Wang Q, Chen Q, Liu P, Zhang J, Zhou L, Peng L. Functional Magnetic Resonance Imaging Reveals Early Connectivity Changes in the Auditory and Vestibular Cortices in Idiopathic Sudden Sensorineural Hearing Loss With Vertigo: A Pilot Study. Front Hum Neurosci 2021; 15:719254. [PMID: 34646127 PMCID: PMC8502874 DOI: 10.3389/fnhum.2021.719254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 09/01/2021] [Indexed: 11/13/2022] Open
Abstract
The underlying pathophysiology of idiopathic sudden sensorineural hearing loss (ISSNHL) with vertigo has yet to be identified. The aims of the current study were (1) to elucidate whether there are functional changes of the intrinsic brain activity in the auditory and vestibular cortices of the ISSNHL patients with vertigo using resting-state functional magnetic resonance imaging (rs-fMRI) and (2) whether the connectivity alterations are related to the clinical performance associated with ISSNHL with vertigo. Twelve ISSNHL patients with vertigo, eleven ISSNHL patients without vertigo and eleven healthy subjects were enrolled in this study. Rs-fMRI data of auditory and vestibular cortices was extracted and regional homogeneity (ReHo) and seed-based functional connectivity (FC) were evaluated; the chi-square test, the ANOVA and the Bonferroni multiple comparison tests were performed. Significantly decreased ReHo in the ipsilateral auditory cortex, as well as increased FC between the inferior parietal gyrus and the auditory cortex were found in the ISSNHL with vertigo groups. These findings contribute to a characterization of early plastic changes in ISSNHL patients with vertigo and cultivate new insights for the etiology research.
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Affiliation(s)
- Qiuxia Wang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qingguo Chen
- Department of Otorhinolaryngology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ping Liu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Zhang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liangqiang Zhou
- Department of Otorhinolaryngology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liyan Peng
- Department of Otorhinolaryngology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Manipulation of Auditory Inputs as Rehabilitation Therapy for Maladaptive Auditory Cortical Reorganization. Neural Plast 2018; 2018:2546250. [PMID: 29887880 PMCID: PMC5985139 DOI: 10.1155/2018/2546250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 03/08/2018] [Accepted: 04/23/2018] [Indexed: 12/19/2022] Open
Abstract
Neurophysiological and neuroimaging data suggest that the brains of not only children but also adults are reorganized based on sensory inputs and behaviors. Plastic changes in the brain are generally beneficial; however, maladaptive cortical reorganization in the auditory cortex may lead to hearing disorders such as tinnitus and hyperacusis. Recent studies attempted to noninvasively visualize pathological neural activity in the living human brain and reverse maladaptive cortical reorganization by the suitable manipulation of auditory inputs in order to alleviate detrimental auditory symptoms. The effects of the manipulation of auditory inputs on maladaptively reorganized brain were reviewed herein. The findings obtained indicate that rehabilitation therapy based on the manipulation of auditory inputs is an effective and safe approach for hearing disorders. The appropriate manipulation of sensory inputs guided by the visualization of pathological brain activities using recent neuroimaging techniques may contribute to the establishment of new clinical applications for affected individuals.
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Sekiya K, Fukushima M, Teismann H, Lagemann L, Kakigi R, Pantev C, Okamoto H. Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss. J Vis Exp 2016:e53264. [PMID: 26863274 PMCID: PMC4781698 DOI: 10.3791/53264] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Sudden sensorineural hearing loss (SSHL) is characterized by acute, idiopathic hearing loss. The estimated incidence rate is 5-30 cases per 100,000 people per year. The causes of SSHL and the mechanisms underlying SSHL currently remain unknown. Based on several hypotheses such as a circulatory disturbance to the cochlea, viral infection, and autoimmune disease, pharmaco-therapeutic approaches have been applied to treat SSHL patients; however, the efficacy of the standard treatment, corticosteroid therapy, is still under debate. Exposure to intense sounds has been shown to cause permanent damage to the auditory system; however, exposure to a moderate level enriched acoustic environment after noise trauma may reduce hearing impairments. Several neuroimaging studies recently suggested that the onset of SSHL induced maladaptive cortical reorganization in the human auditory cortex, and that the degree of cortical reorganization in the acute SSHL phase negatively correlated with the recovery rate from hearing loss. This article reports the development of a novel neuro-rehabilitation approach for SSHL, "constraint-induced sound therapy (CIST)". The aim of the CIST protocol is to prevent or reduce maladaptive cortical reorganization by using an enriched acoustic environment. The canal of the intact ear of SSHL patients is plugged in order to motivate them to actively use the affected ear and thereby prevent progress of maladaptive cortical reorganization. The affected ear is also exposed to music via a headphone for 6 hr per day during hospitalization. The CIST protocol appears to be a safe, easy, inexpensive, and effective treatment for SSHL.
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Affiliation(s)
- Kenichi Sekiya
- Department of Integrative Physiology, National Institute for Physiological Sciences; Department of Otolaryngology, Head and Neck Surgery, Nagoya City University Graduate School of Medical Sciences and Medical School
| | | | - Henning Teismann
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster; Institute for Epidemiology and Social Medicine, University of Muenster
| | - Lothar Lagemann
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster
| | - Ryusuke Kakigi
- Department of Integrative Physiology, National Institute for Physiological Sciences; Sokendai Graduate University for Advanced Studies
| | - Christo Pantev
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster
| | - Hidehiko Okamoto
- Department of Integrative Physiology, National Institute for Physiological Sciences; Institute for Biomagnetism and Biosignalanalysis, University of Muenster; Sokendai Graduate University for Advanced Studies;
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Zhang D, Ma Y. Repetitive transcranial magnetic stimulation improves both hearing function and tinnitus perception in sudden sensorineural hearing loss patients. Sci Rep 2015; 5:14796. [PMID: 26463446 PMCID: PMC4604476 DOI: 10.1038/srep14796] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 09/09/2015] [Indexed: 11/17/2022] Open
Abstract
The occurrence of sudden sensorineural hearing loss (SSHL) affects not only cochlear activity but also neural activity in the central auditory system. Repetitive transcranial magnetic stimulation (rTMS) above the auditory cortex has been reported to improve auditory processing and to reduce the perception of tinnitus, which results from network dysfunction involving both auditory and non-auditory brain regions. SSHL patients who were refractory to standard corticosteroid therapy (SCT) and hyperbaric oxygen (HBO) therapy received 20 sessions of 1 Hz rTMS to the temporoparietal junction ipsilateral to the symptomatic ear (rTMS group). RTMS therapy administered in addition to SCT and HBO therapy resulted in significantly greater recovery of hearing function and improvement of tinnitus perception compared SCT and HBO therapy without rTMS therapy. Additionally, the single photon emission computed tomography (SPECT) measurements obtained in a subgroup of patients suggested that the rTMS therapy could have alleviated the decrease in regional cerebral brain flow (rCBF) in SSHL patients. RTMS appears to be an effective, practical, and safe treatment strategy for SSHL.
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Affiliation(s)
- Dai Zhang
- Department of Rehabilitation Medicine, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Yuewen Ma
- Department of Rehabilitation Medicine, The First Affiliated Hospital, China Medical University, Shenyang, China
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Okamoto H, Fukushima M, Teismann H, Lagemann L, Kitahara T, Inohara H, Kakigi R, Pantev C. Constraint-induced sound therapy for sudden sensorineural hearing loss--behavioral and neurophysiological outcomes. Sci Rep 2014; 4:3927. [PMID: 24473277 PMCID: PMC3905271 DOI: 10.1038/srep03927] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 01/14/2014] [Indexed: 01/22/2023] Open
Abstract
Sudden sensorineural hearing loss is characterized by acute, idiopathic hearing deterioration. We report here the development and evaluation of "constraint-induced sound therapy", which is based on a well-established neuro-rehabilitation approach, and which is characterized by the plugging of the intact ear ("constraint") and the simultaneous, extensive stimulation of the affected ear with music. The sudden sensorineural hearing loss patients who received the constraint-induced sound therapy in addition to the standard corticosteroid therapy showed significantly better recovery of hearing function compared to those who had only received corticosteroid treatments. Additionally, the brain activity obtained in a subgroup of patients suggested that the constraint-induced sound therapy could have prevented maladaptive auditory cortex reorganization. Constraint-induced sound therapy thus appears to be an effective, practical, and safe treatment option for sudden sensorineural hearing loss.
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Affiliation(s)
- Hidehiko Okamoto
- Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, 48149 Muenster, Germany
| | - Munehisa Fukushima
- Department of Otolaryngology, Osaka Rosai Hospital, Sakai, Osaka 591-8025, Japan
| | - Henning Teismann
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, 48149 Muenster, Germany
- Institute for Epidemiology and Social Medicine, University of Muenster, 48149 Muenster, Germany
| | - Lothar Lagemann
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, 48149 Muenster, Germany
| | - Tadashi Kitahara
- Department of Otolaryngology, Osaka Rosai Hospital, Sakai, Osaka 591-8025, Japan
- Department of Otorhinolaryngology Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Hidenori Inohara
- Department of Otorhinolaryngology Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Ryusuke Kakigi
- Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan
| | - Christo Pantev
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, 48149 Muenster, Germany
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Burton H, Firszt JB, Holden T. Hearing thresholds and FMRI of auditory cortex following eighth cranial nerve surgery. Otolaryngol Head Neck Surg 2013; 149:492-9. [PMID: 23804630 PMCID: PMC3836431 DOI: 10.1177/0194599813495179] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 06/04/2013] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Determine whether auditory cortex (AC) organization changed following eighth cranial nerve surgery in adults with vestibular-cochlear nerve pathologies. We examined whether hearing thresholds before and after surgery correlated with increased ipsilateral activation of AC from the intact ear. STUDY DESIGN During magnetic resonance imaging sessions before and 3 and 6 months after surgery, subjects listened with the intact ear to noise-like random spectrogram sounds. SETTING Departments of Radiology and Otolaryngology of Washington University School of Medicine. SUBJECTS AND METHODS Three patients with acoustic neuromas received Gamma Knife radiosurgery (GK); 1 patient with Meniere's disease and 5 with acoustic neuromas had surgical resections (SR); 2 of the latter also had GK. Hearing thresholds in each ear were for pure tone stimuli from 250 to 8000 Hz before and after surgery (3 and 6 months). At the same intervals, we imaged blood oxygen level-dependent responses to auditory stimulation of the intact ear using an interrupted single-event design. RESULTS Hearing thresholds in 2 of 3 individuals treated with GK did not change. Five of 6 individuals became unilaterally deaf after SRs. Ipsilateral AC activity was present before surgery in 6 of 9 individuals with ipsilateral spatial extents greater than contralateral in 3 of 9. Greater contralateral predominance was significant especially in left compared to right ear affected individuals, including those treated by GK. CONCLUSION Lateralization of auditory-evoked responses in AC did not change significantly after surgery possibly due to preexisting sensory loss before surgery, indicating that less than profound loss may prompt cortical reorganization.
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Affiliation(s)
- Harold Burton
- Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA.
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Maslin MRD, Munro KJ, El-Deredy W. Evidence for multiple mechanisms of cortical plasticity: a study of humans with late-onset profound unilateral deafness. Clin Neurophysiol 2013; 124:1414-21. [PMID: 23529154 DOI: 10.1016/j.clinph.2012.12.052] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 12/04/2012] [Accepted: 12/08/2012] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To investigate 1: plasticity due to partial unilateral deafness of slow onset and 2: the time course of plasticity following abrupt, profound unilateral deafness in adult humans using cortical auditory evoked potentials. METHODS Baseline data were measured from six participants with partial unilateral deafness due to an acoustic neuroma and compared with data from six controls. Further measurements were made in the unilaterally deaf group at 1-, 3- and 6-months post surgery for acoustic neuroma removal and consequent profound unilateral deafness. Data were recorded from 30 channels in response to pure tones presented to the intact ear. RESULTS Baseline data revealed statistically higher amplitudes in unilaterally deaf participants but with normal hemispheric asymmetry. Longitudinal data revealed further increases in P1 amplitudes by 1-month post-surgery, and in N1 and P2 amplitudes by 6-months post-surgery, with statistically different scalp field topographies indicating reduced hemispheric asymmetries. CONCLUSION Different patterns of plasticity occur following partial and profound unilateral deafness. Plasticity occurs both relatively rapidly and more gradually over at least 6-months post-surgery. SIGNIFICANCE The different patterns of change over time are consistent with multiple physiological mechanisms of plasticity. Unravelling these mechanisms and their time course in humans may be relevant in understanding and, ultimately, influencing plasticity for therapeutic gain.
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Affiliation(s)
- Michael R D Maslin
- School of Psychological Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
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Maslin MR, Munro KJ, El-Deredy W. Source analysis reveals plasticity in the auditory cortex: Evidence for reduced hemispheric asymmetries following unilateral deafness. Clin Neurophysiol 2013; 124:391-9. [DOI: 10.1016/j.clinph.2012.07.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 07/11/2012] [Accepted: 07/31/2012] [Indexed: 10/28/2022]
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Li LPH, Chen KC, Lee PL, Niddam DM, Cheng CM, Chou CC, Hsieh JC, Shiao AS. Neuromagnetic index of hemispheric asymmetry predicting long-term outcome in sudden hearing loss. Neuroimage 2012; 64:356-64. [PMID: 22982726 DOI: 10.1016/j.neuroimage.2012.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 08/30/2012] [Accepted: 09/01/2012] [Indexed: 10/27/2022] Open
Abstract
The neuromagnetic index of hemispheric asymmetry in terms of ipsilateral/contralateral ratio at acute stage was previously revealed to prognosticate the 1-month hearing outcome of acute unilateral idiopathic sudden sensorineural hearing loss (ISSNHL), showing a dynamic relationship between top- and down-levels of auditory pathway. However, the prognostic effect of reorganization pattern for the long-term results remained elusive. This study aimed to probe the prognosticating relevance of hemispheric asymmetry to the hearing at chronic stage of ISSNHL. Using magnetoencephalography (MEG), inter-hemispheric differences in peak dipole of N100m responses to monaural tones were evaluated in 21 controls and 21 ISSNHL patients at initial and final (12 months later) stages. Predictive value of hemispheric asymmetry was assessed by correlating hearing level and ipsilateral/contralateral ratio (I/C) of N100m latency and amplitude. Healthy-side dominance of N100m was observed in ISSNHL initially, and remained in three final prognostic subgroups (complete, partial, and no recovery) of ISSNHL. The initial I/C(amplitude) on affected-ear stimulation strongly correlated with the hearing level of final stage in ISSNHL. However, there was no prognostic effect of hemispheric asymmetry pattern for the 12-month hearing improvement. The heterogeneity between neuromagnetic index and hearing levels possibly echoed different pathogeneses of ISSNHL. Since a restored hearing status did not necessarily lead toward a normal functional organization, the dynamics of hemispheric asymmetry could actually index a central resilient reorganization in the brain for sound processing in ISSNHL. Our finding showed not only a clinically relevant measure to predict final hearing of ISSNHL, but also a linkage between central plasticity and cochlear lesion. This finding suggests a new perspective, and perhaps new interventions, to diagnose and treat unilateral ISSNHL.
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Affiliation(s)
- Lieber Po-Hung Li
- Department of Otolaryngology, Cheng Hsin General Hospital, Taipei, Taiwan
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Auditory evoked magnetic fields in patients with absent brainstem responses due to auditory neuropathy with optic atrophy. Clin Neurophysiol 2012; 123:985-92. [PMID: 22119798 DOI: 10.1016/j.clinph.2011.10.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 09/23/2011] [Accepted: 10/23/2011] [Indexed: 11/24/2022]
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12
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Li LPH, Shiao AS, Chen KC, Lee PL, Niddam DM, Chang SY, Hsieh JC. Neuromagnetic index of hemispheric asymmetry prognosticating the outcome of sudden hearing loss. PLoS One 2012; 7:e35055. [PMID: 22532839 PMCID: PMC3332152 DOI: 10.1371/journal.pone.0035055] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2011] [Accepted: 03/08/2012] [Indexed: 12/02/2022] Open
Abstract
The longitudinal relationship between central plastic changes and clinical presentations of peripheral hearing impairment remains unknown. Previously, we reported a unique plastic pattern of “healthy-side dominance” in acute unilateral idiopathic sudden sensorineural hearing loss (ISSNHL). This study aimed to explore whether such hemispheric asymmetry bears any prognostic relevance to ISSNHL along the disease course. Using magnetoencephalography (MEG), inter-hemispheric differences in peak dipole amplitude and latency of N100m to monaural tones were evaluated in 21 controls and 21 ISSNHL patients at two stages: initial and fixed stage (1 month later). Dynamics/Prognostication of hemispheric asymmetry were assessed by the interplay between hearing level/hearing gain and ipsilateral/contralateral ratio (I/C) of N100m latency and amplitude. Healthy-side dominance of N100m amplitude was observed in ISSNHL initially. The pattern changed with disease process. There is a strong correlation between the hearing level at the fixed stage and initial I/Camplitude on affected-ear stimulation in ISSNHL. The optimal cut-off value with the best prognostication effect for the hearing improvement at the fixed stage was an initial I/Clatency on affected-ear stimulation of 1.34 (between subgroups of complete and partial recovery) and an initial I/Clatency on healthy-ear stimulation of 0.76 (between subgroups of partial and no recovery), respectively. This study suggested that a dynamic process of central auditory plasticity can be induced by peripheral lesions. The hemispheric asymmetry at the initial stage bears an excellent prognostic potential for the treatment outcomes and hearing level at the fixed stage in ISSNHL. Our study demonstrated that such brain signature of central auditory plasticity in terms of both N100m latency and amplitude at defined time can serve as a prognostication predictor for ISSNHL. Further studies are needed to explore the long-term temporal scenario of auditory hemispheric asymmetry and to get better psychoacoustic correlates of pathological hemispheric asymmetry in ISSNHL.
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Affiliation(s)
- Lieber Po-Hung Li
- Department of Otolaryngology, Cheng Hsin General Hospital, Taipei, Taiwan
- Integrated Brain Research Laboratory, Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - An-Suey Shiao
- Department of Otolaryngology, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Kuang-Chao Chen
- Department of Otolaryngology, Cheng Hsin General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Po-Lei Lee
- Department of Electrical Engineering, National Central University, Taoyuan, Taiwan
| | - David M. Niddam
- Integrated Brain Research Laboratory, Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
| | - Shyue-Yih Chang
- Department of Otolaryngology, Cheng Hsin General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Jen-Chuen Hsieh
- Integrated Brain Research Laboratory, Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan
- * E-mail:
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Obligatory cortical auditory evoked potential waveform detection and differentiation using a commercially available clinical system: HEARLab™. Ear Hear 2012; 32:782-6. [PMID: 21566525 DOI: 10.1097/aud.0b013e318220377e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The aim was to investigate detection and differentiation of obligatory cortical auditory evoked potentials (CAEPs) in normal-hearing listeners with and without a simulated conductive hearing impairment using the HEARLab™. DESIGN Sound field CAEPs were obtained from 24 normal-hearing adults, with and without earplugs, using three natural speech sounds (/m/, /g/, and /t/) presented at 55, 65, and 75 dB SPL. RESULTS Response detection was good except for the lowest presentation level; however, differentiation of waveforms was generally poor for individual listeners. CONCLUSIONS Waveform differentiation was relatively poor, especially at low presentation levels, using the HEARLab's stimulus and analysis protocol.
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Popelar J, Grecova J, Rybalko N, Syka J. Comparison of noise-induced changes of auditory brainstem and middle latency response amplitudes in rats. Hear Res 2008; 245:82-91. [PMID: 18812219 DOI: 10.1016/j.heares.2008.09.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 09/03/2008] [Accepted: 09/05/2008] [Indexed: 10/21/2022]
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Hine J, Thornton R, Davis A, Debener S. Does long-term unilateral deafness change auditory evoked potential asymmetries? Clin Neurophysiol 2008; 119:576-586. [DOI: 10.1016/j.clinph.2007.11.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2007] [Revised: 10/02/2007] [Accepted: 11/08/2007] [Indexed: 10/22/2022]
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