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Svobodová V, Profant O, Syka J, Tóthová D, Bureš Z. The Influence of Asymmetric Hearing Loss on Peripheral and Central Auditory Processing Abilities in Patients With Vestibular Schwannoma. Ear Hear 2024:00003446-990000000-00311. [PMID: 39004787 DOI: 10.1097/aud.0000000000001555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
OBJECTIVES Asymmetric or unilateral hearing loss (AHL) may cause irreversible changes in the processing of acoustic signals in the auditory system. We aim to provide a comprehensive view of the auditory processing abilities for subjects with acquired AHL, and to examine the influence of AHL on speech perception under difficult conditions, and on auditory temporal and intensity processing. DESIGN We examined peripheral and central auditory functions for 25 subjects with AHL resulting from vestibular schwannoma, and compared them to those from 24 normal-hearing controls that were matched with the AHL subjects in mean age and hearing thresholds in the healthy ear. Besides the basic hearing threshold assessment, the tests comprised the detection of tones and gaps in a continuous noise, comprehension of speech in babble noise, binaural interactions, difference limen of intensity, and detection of frequency modulation. For the AHL subjects, the selected tests were performed separately for the healthy and diseased ear. RESULTS We observed that binaural speech comprehension, gap detection, and frequency modulation detection abilities were dominated by the healthy ear and were comparable for both groups. The AHL subjects were less sensitive to interaural delays, however, they exhibited a higher sensitivity to sound level, as indicated by lower difference limen of intensity and a higher sensitivity to interaural intensity difference. Correlations between the individual test scores indicated that speech comprehension by the AHL subjects was associated with different auditory processing mechanisms than for the control subjects. CONCLUSIONS The data suggest that AHL influences both peripheral and central auditory processing abilities and that speech comprehension under difficult conditions relies on different mechanisms for the AHL subjects than for normal-hearing controls.
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Affiliation(s)
- Veronika Svobodová
- Department of Auditory Neuroscience, Institute of Experimental Medicine, Czech Academy of Sciences, Prague 4, Czech Republic
- Department of Otorhinolaryngology and Head and Neck Surgery, First Faculty of Medicine, University Hospital Motol, Charles University in Prague, Prague 5, Czech Republic
| | - Oliver Profant
- Department of Auditory Neuroscience, Institute of Experimental Medicine, Czech Academy of Sciences, Prague 4, Czech Republic
- Department of Otorhinolaryngology, Third Faculty of Medicine, University Hospital Královské Vinohrady, Charles University in Prague, Prague 10, Czech Republic
| | - Josef Syka
- Department of Auditory Neuroscience, Institute of Experimental Medicine, Czech Academy of Sciences, Prague 4, Czech Republic
- Department of Cognitive Systems and Neurosciences, Czech Institute of Informatics, Robotics and Cybernetics, Czech Technical University in Prague, Prague 6, Czech Republic
| | - Diana Tóthová
- Department of Auditory Neuroscience, Institute of Experimental Medicine, Czech Academy of Sciences, Prague 4, Czech Republic
- Department of Otorhinolaryngology and Head and Neck Surgery, First Faculty of Medicine, University Hospital Motol, Charles University in Prague, Prague 5, Czech Republic
| | - Zbyněk Bureš
- Department of Otorhinolaryngology, Third Faculty of Medicine, University Hospital Královské Vinohrady, Charles University in Prague, Prague 10, Czech Republic
- Department of Technical Studies, College of Polytechnics Jihlava, Jihlava, Czech Republic
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Pittman AL, Pastore MT. Spatial Hearing in Children With and Without Hearing Loss: Where and What the Speech Is Matters for Local Speech Intelligibility. Am J Audiol 2024; 33:442-454. [PMID: 38557158 DOI: 10.1044/2024_aja-23-00250] [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: 04/04/2024] Open
Abstract
PURPOSE This study examined children's ability to perceive speech from multiple locations on the horizontal plane. Children with hearing loss were compared to normal-hearing peers while using amplification with and without advanced noise management. METHOD Participants were 21 children with normal hearing (9-15 years) and 12 children with moderate symmetrical hearing loss (11-15 years). Word recognition, nonword detection, and word recall were assessed. Stimuli were presented randomly from multiple discrete locations in multitalker noise. Children with hearing loss were fit with devices having separate omnidirectional and noise management programs. The noise management feature is designed to preserve audibility in noise by rapidly analyzing input from all locations and reducing the noise management when speech is detected from locations around the hearing aid user. RESULTS Significant effects of left/right and front/back lateralization occurred as well as effects of hearing loss and hearing aid noise management. Children with normal hearing experienced a left-side advantage for word recognition and a right-side advantage for nonword detection. Children with hearing loss demonstrated poorer performance overall on all tasks with better word recognition from the back, and word recall from the right, in the omnidirectional condition. With noise management, performance improved from the front compared to the back for all three tasks and from the right for word recognition and word recall. CONCLUSIONS The shape of children's local speech intelligibility on the horizontal plane is not omnidirectional. It is task dependent and shaped further by hearing loss and hearing aid signal processing. Front/back shifts in children with hearing loss are consistent with the behavior of hearing aid noise management, while the right-side biases observed in both groups are consistent with the effects of specialized speech processing in the left hemisphere of the brain.
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Affiliation(s)
- Andrea L Pittman
- Department of Speech and Hearing Science, Arizona State University, Tempe
| | - M Torben Pastore
- Department of Speech and Hearing Science, Arizona State University, Tempe
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Impact of unilateral hearing loss in early development. Curr Opin Otolaryngol Head Neck Surg 2022; 30:344-350. [PMID: 36004776 DOI: 10.1097/moo.0000000000000848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW The purpose of this review is to provide an update on current literature as it relates to the impact of unilateral hearing loss for the pediatric population. RECENT FINDINGS Current studies further corroborate past research findings which reveal the potential consequences of unilateral hearing loss on spatial hearing, language, and neurocognitive functioning. Deficits among children with unilateral hearing loss may parallel those seen in children with bilateral hearing loss, further challenging historic views that hearing in one ear in childhood is sufficient for normal development. The potential deficiencies seen in children with unilateral hearing loss can be subtler than those seen with bilateral hearing loss, but may nonetheless also impact school performance, patient fatigue, parental stress, and quality of life. Early interventions within a sensitive period of development of the central auditory system may circumvent potential barriers in cognitive, academic, and psychosocial development. SUMMARY This review synthesizes the latest research on the impact of unilateral hearing loss in childhood and the role for possible interventions. The summarized information may serve to support the development of new guidelines for the evaluation and treatment of children with unilateral hearing loss.
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Deng X, Liu L, Zhen Z, Chen Q, Liu L, Hui X. Cognitive decline in acoustic neuroma patients: An investigation based on resting-state functional magnetic resonance imaging and voxel-based morphometry. Front Psychiatry 2022; 13:968859. [PMID: 35978844 PMCID: PMC9376325 DOI: 10.3389/fpsyt.2022.968859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 07/08/2022] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE Acoustic neuroma (AN) is a clinically common benign tumor. There are few neuropsychological investigations for AN, especially cognitive neuropsychology. Herein, the study probed into cognitive function changes in AN patients and expounded possible mechanisms through structural and functional magnetic resonance imaging (fMRI). MATERIALS AND METHODS Neuropsychological tests were performed between 64 patients with AN and 67 healthy controls. Then, using resting-state fMRI, the possible mechanisms of cognitive decline in AN patients were further explored by calculating the amplitude of low-frequency fluctuations (ALFF) and regional homogeneity (ReHo). Furthermore, using high-resolution T1-weighted images, voxel-based morphometry (VBM) was adopted to investigate the changes in gray matter volume (GMV) and white matter volume (WMV) in AN patients. RESULTS AN patients had worse cognitive performance than those in the healthy controls. Relative to the healthy individuals, the mALFF value was increased in the right caudate nucleus of the patients with left-sided AN (LAN) and the right rectus region of the patients with right-sided AN (RAN). The mReHo values of the bilateral superior frontal gyrus and middle frontal gyrus were decreased in LAN patients. Compared with healthy subjects, the GMV values were elevated in the left fusiform gyrus, parahippocampal gyrus, calcarine gyrus, and cuneus in LAN patients as well as in the right fusiform gyrus and parahippocampal gyrus in RAN patients. Meanwhile, the WMV values showed elevations in the bilateral putamen, left rectal gyrus, and thalamus in LAN patients. CONCLUSION Cognitive dysfunction occurs in AN patients. Cognitive decline in AN patients activates functional activity in some brain regions, thereby compensating for cognition decline. Additionally, the ReHo values were reduced in the frontal lobe in LAN patients, and the connectivity was decreased, affecting the functional differentiation and integration of the brain, which may be associated with the decline in cognitive function. Lateralized brain reorganization induced by unilateral hearing loss was presented in AN patients. LAN caused a more significant interference effect on the brain while RAN patients showed more stable cerebral cortices. Altogether, responding to cognition decline in AN patients, structural reorganization occurs, and compensative increases in cognitive-related brain regions, which compensates for cognitive impairment.
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Affiliation(s)
- Xueyun Deng
- Department of Neurosurgery, The Affiliated Nanchong Central Hospital of North Sichuan Medical College, Nanchong, China.,Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, China
| | - Lizhen Liu
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Zhiming Zhen
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Quan Chen
- Department of Neurology, Chenjiaqiao Hospital, Chongqing, China
| | - Lihua Liu
- Department of Geriatrics, The Affiliated Nanchong Central Hospital of North Sichuan Medical College, Nanchong, China
| | - Xuhui Hui
- Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, China
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Yang T, Liu Q, Fan X, Hou B, Wang J, Chen X. Altered regional activity and connectivity of functional brain networks in congenital unilateral conductive hearing loss. NEUROIMAGE-CLINICAL 2021; 32:102819. [PMID: 34537683 PMCID: PMC8455857 DOI: 10.1016/j.nicl.2021.102819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 08/08/2021] [Accepted: 08/20/2021] [Indexed: 11/18/2022]
Abstract
Focal brain function and seed-based functional connectivity were first analyzed in congenital unilateral CHL. Auditory and visual networks showed altered regional activity and functional connectivity. Abnormally high activity in the left ITG was positively correlated with duration of disease. Higher-order networks including frontoparietal regions and DMN demonstrated abnormal functional connectivity. GSR may produce spurious signals in SBFC analyses.
Neuroimaging studies have shown marked alterations in brain function after auditory deprivation, with these alterations mainly caused by sensorineural hearing loss. To date, however, little is known about the patterns of functional brain reorganization in conductive hearing loss (CHL). The effects of congenital unilateral CHL on human brain were assessed by resting-state functional magnetic resonance imaging in 24 patients with unilateral microtia (UM) and 25 healthy controls. Focal brain function and seed-based functional connectivity were analyzed to characterize spontaneous activity and network changes in UM. Patients with UM showed common alterations in focal brain activities in the left inferior temporal gyrus across different measurements, with these alterations significantly associated with the duration of hearing loss. Additionally, focal brain activities were decreased in the auditory system and increased in the visual system, with a disassociated pattern shown in the default-mode system. Using the left inferior temporal gyrus as the seed region, patients with UM showed lower connectivity with the default-mode system and right visual regions but higher connectivity with the left frontoparietal regions when compared with controls. These results indicate that congenital partial hearing deprivation, despite normal bone conduction hearing, can induce widespread reorganizations that continue into adolescence and adulthood.
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Affiliation(s)
- Tengyu Yang
- Department of Otolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, People's Republic of China
| | - Qiang Liu
- Department of Otolaryngology Head and Neck Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, People's Republic of China
| | - Xinmiao Fan
- Department of Otolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, People's Republic of China
| | - Bo Hou
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, People's Republic of China
| | - Jian Wang
- Department of Otolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, People's Republic of China.
| | - Xiaowei Chen
- Department of Otolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, People's Republic of China.
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Vanderauwera J, Hellemans E, Verhaert N. Research Insights on Neural Effects of Auditory Deprivation and Restoration in Unilateral Hearing Loss: A Systematic Review. J Clin Med 2020; 9:E812. [PMID: 32192018 PMCID: PMC7141286 DOI: 10.3390/jcm9030812] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/05/2020] [Accepted: 03/13/2020] [Indexed: 12/25/2022] Open
Abstract
Neuroplasticity following bilateral deafness and auditory restoration has been repeatedly investigated. In clinical practice, however, a significant number of patients present a severe-to-profound unilateral hearing loss (UHL). To date, less is known about the neuroplasticity following monaural hearing deprivation and auditory input restoration. This article provides an overview of the current research insights on the impact of UHL on the brain and the effect of auditory input restoration with a cochlear implant (CI). An exhaustive systematic review of the literature was performed selecting 38 studies that apply different neural analyses techniques. The main results show that the hearing ear becomes functionally dominant after monaural deprivation, reshaping the lateralization of the neural network for auditory processing, a process that can be considered to influence auditory restoration. Furthermore, animal models predict that the onset time of UHL impacts auditory restoration. Hence, the results seem to advocate for early restoration of UHL, although further research is required to disambiguate the effects of duration and onset of UHL on auditory restoration and on structural neuroplasticity following UHL deprivation and restoration. Ongoing developments on CI devices compatible with Magnetic Resonance Imaging (MRI) examinations will provide a unique opportunity to investigate structural and functional neuroplasticity following CI restoration more directly.
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Affiliation(s)
- Jolijn Vanderauwera
- Psychological Sciences Research Institute, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium;
- Institute of Neuroscience, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Elisabeth Hellemans
- Department of Otolaryngology, Head and Neck Surgery, University Hospitals Leuven, 3000 Leuven, Belgium;
| | - Nicolas Verhaert
- Department of Otolaryngology, Head and Neck Surgery, University Hospitals Leuven, 3000 Leuven, Belgium;
- KU Leuven, Research Group ExpORL, Department of Neurosciences, 3000 Leuven, Belgium
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Ratnanather JT. Structural neuroimaging of the altered brain stemming from pediatric and adolescent hearing loss-Scientific and clinical challenges. WILEY INTERDISCIPLINARY REVIEWS. SYSTEMS BIOLOGY AND MEDICINE 2020; 12:e1469. [PMID: 31802640 PMCID: PMC7307271 DOI: 10.1002/wsbm.1469] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 10/01/2019] [Accepted: 10/13/2019] [Indexed: 12/20/2022]
Abstract
There has been a spurt in structural neuroimaging studies of the effect of hearing loss on the brain. Specifically, magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) technologies provide an opportunity to quantify changes in gray and white matter structures at the macroscopic scale. To date, there have been 32 MRI and 23 DTI studies that have analyzed structural differences accruing from pre- or peri-lingual pediatric hearing loss with congenital or early onset etiology and postlingual hearing loss in pre-to-late adolescence. Additionally, there have been 15 prospective clinical structural neuroimaging studies of children and adolescents being evaluated for cochlear implants. The results of the 70 studies are summarized in two figures and three tables. Plastic changes in the brain are seen to be multifocal rather than diffuse, that is, differences are consistent across regions implicated in the hearing, speech and language networks regardless of modes of communication and amplification. Structures in that play an important role in cognition are affected to a lesser extent. A limitation of these studies is the emphasis on volumetric measures and on homogeneous groups of subjects with hearing loss. It is suggested that additional measures of morphometry and connectivity could contribute to a greater understanding of the effect of hearing loss on the brain. Then an interpretation of the observed macroscopic structural differences is given. This is followed by discussion of how structural imaging can be combined with functional imaging to provide biomarkers for longitudinal tracking of amplification. This article is categorized under: Developmental Biology > Developmental Processes in Health and Disease Translational, Genomic, and Systems Medicine > Translational Medicine Laboratory Methods and Technologies > Imaging.
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Affiliation(s)
- J. Tilak Ratnanather
- Center for Imaging Science, Johns Hopkins University, Baltimore, Maryland
- Institute for Computational Medicine, Johns Hopkins University, Baltimore, Maryland
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
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Zhou M, Yuan J, Yan Z, Dai J, Wang X, Xu T, Xu Z, Wang N, Liu J. Intrinsic and Miniature Postsynaptic Current Changes in Rat Principal Neurons of the Lateral Superior Olive after Unilateral Auditory Deprivation at an Early Age. Neuroscience 2019; 428:2-12. [PMID: 31866557 DOI: 10.1016/j.neuroscience.2019.12.001] [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: 09/07/2019] [Revised: 11/30/2019] [Accepted: 12/02/2019] [Indexed: 01/13/2023]
Abstract
Unilateral auditory deprivation results in lateralization changes in the central auditory system, interfering with the integration of binaural information and thereby leading to a decrease in binaural auditory functions such as sound localization. Principal neurons of the lateral superior olive (LSO) are responsible for computing the interaural intensity differences that are critical for sound localization in the horizontal plane. To investigate changes caused by unilateral auditory deprivation, electrophysiological activity was recorded from LSO principal neurons in control rats and rats with unilateral cochlear ablation. At one week after unilateral cochlear ablation, the excitability of LSO principal neurons on the side ipsilateral to the ablation (the ablated side) was greater than that on the side contralateral to the ablation (the intact side); however, the input resistance increased on both sides. Furthermore, by analysing the miniature inhibitory postsynaptic currents and miniature excitatory postsynaptic currents, we found that unilateral auditory deprivation weakened the inhibitory driving force on the intact side, whereas it strengthened the excitatory driving force on the ablated side. In summary, asymmetric changes in the electrophysiological activity of LSO principal neurons were found on both sides at postnatal day 19, one week after unilateral cochlear ablation.
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Affiliation(s)
- Mo Zhou
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Jingjing Yuan
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Zhanfeng Yan
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Jinsheng Dai
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Xing Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Tao Xu
- Department of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Laboratory of Brain Disorders (Ministry of Science and Technology), Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
| | - Zhiqing Xu
- Department of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Laboratory of Brain Disorders (Ministry of Science and Technology), Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
| | - Ningyu Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.
| | - Jinfeng Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.
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Shang Y, Hinkley LB, Cai C, Mizuiri D, Cheung SW, Nagarajan SS. Cross-modal plasticity in adult single-sided deafness revealed by alpha band resting-state functional connectivity. Neuroimage 2019; 207:116376. [PMID: 31756519 DOI: 10.1016/j.neuroimage.2019.116376] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 10/10/2019] [Accepted: 11/17/2019] [Indexed: 12/26/2022] Open
Abstract
Single-sided deafness (SSD) or profound unilateral hearing loss is the condition where the transfer of acoustic information to the brain is restricted to one ear. SSD impairment is most evident under adverse acoustic environments with overlapping interference, which burdens cognitive resources. It is known that bilateral deafness induces cross-modal brain plasticity within visual cortical areas. Here we investigate whether similar cross-modal plasticity is observed in adult-onset SSD. In SSD patients (n = 29) and matched controls (n = 29) we estimated voxel level resting-state power and functional connectivity in the alpha band (8-12 Hz) from magnetoencephalography (MEG) data. We examined both global functional connectivity (mean functional connectivity of each voxel with the rest of the brain), and seeded functional connectivity of primary auditory cortices (A1), primary visual cortices (V1) and posterior cingulate cortex (PCC) of the default mode network (DMN). Power reduction was observed in left auditory cortex. Global functional connectivity showed reduction in frontal cortices and enhancement in visual cortex. Seeded functional connectivity of auditory cortices showed reduction in temporal, frontal and occipital regions, and enhancement in parietal cortex. Interestingly, seeded functional connectivity of visual cortices showed enhancement in visual cortices, inferior parietal lobe, post-central gyrus, and the precuneus, and reduction in auditory cortex. Seeded functional connectivity of PCC showed reduction in frontal cortical regions that are part of the DMN, attention, and working memory networks. Adult-onset SSD exhibited widespread cross-modal brain plasticity involving alterations in auditory, visual, attention, working memory and default mode networks.
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Affiliation(s)
- Yingying Shang
- Department of Otorhinolaryngology, Peking Union Medical College Hospital, Beijing, 100730, China; Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, CA, 94115, USA.
| | - Leighton B Hinkley
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, 94143, USA
| | - Chang Cai
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, 94143, USA
| | - Danielle Mizuiri
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, 94143, USA
| | - Steven W Cheung
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, CA, 94115, USA
| | - Srikantan S Nagarajan
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, CA, 94115, USA; Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, 94143, USA.
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Etiology and therapy indication for cochlear implantation in children with single-sided deafness. HNO 2019; 67:750-759. [DOI: 10.1007/s00106-019-00729-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Heggdal POL, Aarstad HJ, Brännström J, Vassbotn FS, Specht K. An fMRI-study on single-sided deafness: Spectral-temporal properties and side of stimulation modulates hemispheric dominance. NEUROIMAGE-CLINICAL 2019; 24:101969. [PMID: 31419767 PMCID: PMC6706639 DOI: 10.1016/j.nicl.2019.101969] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 07/21/2019] [Accepted: 08/03/2019] [Indexed: 11/18/2022]
Abstract
Objective Our main aim was to investigate the blood oxygenation level dependent (BOLD) response to monaural and binaural speech- and non-speech stimuli as measured with fMRI in subjects with single-sided deafness and in normal hearing controls. We hypothesised that the response to monaural stimulation in both normal hearing subjects and persons with single-sided deafness would vary with the complexity and nature of the stimuli and the side of stimulation. Design Patients with left- and right single-sided deafness and controls with normal hearing receiving either binaural or monaural stimuli were tested using speech and non-speech auditory stimuli in an event-related fMRI experiment. Study sample Twenty-two patients with single-sided deafness after treatment for vestibular schwannoma and 50 normal hearing controls. Results Normal hearing persons receiving right side monaural stimuli activate bilateral temporal regions. Activation following left side monaural stimulation is more right lateralized. Persons with single-sided deafness respond similarly to controls to monaural stimulation. Persons with right side single-sided deafness show activation of frontal cortical regions not seen in persons with left side single-sided deafness following speech stimuli. This is possibly related to increased effort and more frequently reported problems with communication. Right side single-sided deafness is related to increased activation of areas usually related to processing of degraded input, including the thalamus. Conclusion Hemispheric dominance following monaural auditory stimulation is modulated by the spectral-temporal properties of the stimuli and by which ear is stimulated. Differences between patients with right- and left side deafness suggests that right side deafness is related to increased activation of areas involved in processing of degraded input. Hemispheric dominance following monaural stimulation is modulated by stimuli properties and by which ear is stimulated Results suggests that right side deafness is related to increased activation of eares involved in processing degraded input Self-assessed communication ability and the BOLD-response to phonetic stimuli correlate in several brain regions.
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Affiliation(s)
- Peder O Laugen Heggdal
- Department of Clinical Medicine, Faculty of Medicine and Dentistry, University of Bergen, Jonas Lies vei 87, 5021 Bergen, Norway; Department of Otolaryngology/Head and Neck Surgery, Haukeland University Hospital, PB 1400, 5021 Bergen, Norway.
| | - Hans Jørgen Aarstad
- Department of Clinical Medicine, Faculty of Medicine and Dentistry, University of Bergen, Jonas Lies vei 87, 5021 Bergen, Norway; Department of Otolaryngology/Head and Neck Surgery, Haukeland University Hospital, PB 1400, 5021 Bergen, Norway.
| | - Jonas Brännström
- Department of Clinical Science, Section of logopedics, Phoniatrics and Audiology, Lund University, Box 117, 22100 Lund, Sweden.
| | - Flemming S Vassbotn
- Department of Otolaryngology/Head and Neck Surgery, Haukeland University Hospital, PB 1400, 5021 Bergen, Norway.
| | - Karsten Specht
- Department of Biological and Medical Psychology, University of Bergen, PB 7807, 5020 Bergen, Norway; Department of Education, UiT/The Arctic University of Norway, Tromsø, Norway.
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Qiao Y, Li X, Shen H, Zhang X, Sun Y, Hao W, Guo B, Ni D, Gao Z, Guo H, Shang Y. Downward cross-modal plasticity in single-sided deafness. Neuroimage 2019; 197:608-617. [DOI: 10.1016/j.neuroimage.2019.05.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/21/2019] [Accepted: 05/10/2019] [Indexed: 10/26/2022] Open
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van Wieringen A, Boudewyns A, Sangen A, Wouters J, Desloovere C. Unilateral congenital hearing loss in children: Challenges and potentials. Hear Res 2019; 372:29-41. [PMID: 29395617 DOI: 10.1016/j.heares.2018.01.010] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/17/2017] [Accepted: 01/21/2018] [Indexed: 11/16/2022]
Abstract
The estimated incidence of sensorineural hearing impairment (>40 dB HL) at birth is 1.86 per 1000 newborns in developed countries and 30-40% of these are unilateral. Profound sensorineural unilateral hearing impairment or single sided deafness (SSD) can be treated with a cochlear implant. However, this treatment is costly and invasive and unnecessary in the eyes of many. Very young children with SSD often do not exhibit language and cognitive delays and it is hard to imagine that neurocognitive skills will present difficulties with one good ear. In the current paper we review the most recent evidence on the consequences of unilateral hearing impairment for auditory and neurocognitive factors. While data of both adults and children are discussed, we focus on developmental factors, congenital deafness and a window of opportunity for intervention. We discuss which etiologies qualify for a cochlear implant and present our multi-center prospective study on cochlear implants in infants with one deaf ear. The large, state-of-the art body of research allows for evidence-based decisions regarding management of unilateral hearing loss in children.
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Affiliation(s)
- Astrid van Wieringen
- KU Leuven - University of Leuven, Department of Neurosciences, Experimental ORL, Herestraat 49, 3000 Leuven, Belgium.
| | - An Boudewyns
- Department of Otorhinolaryngology, Head and Neck Surgery, Antwerp University Hospital, University of Antwerp, Wilrijkstraat 10, 2650 Edegem, Belgium
| | - Anouk Sangen
- KU Leuven - University of Leuven, Department of Neurosciences, Experimental ORL, Herestraat 49, 3000 Leuven, Belgium
| | - Jan Wouters
- KU Leuven - University of Leuven, Department of Neurosciences, Experimental ORL, Herestraat 49, 3000 Leuven, Belgium
| | - Christian Desloovere
- KU Leuven - University of Leuven, Department of Neurosciences, Experimental ORL, Herestraat 49, 3000 Leuven, Belgium; University Hospital Leuven, Kapucijnenvoer 33, 3000 Leuven, Belgium
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Abstract
OBJECTIVES To assess acceptance of a cochlear implant (CI) by children with single-sided deafness (SSD) as measured by duration of CI use across daily listening environments. DESIGN Datalogs for 7 children aged 1.1 to 14.5 years (mean ± SD: 5.9 ± 5.9 years old), who had SSD and were implanted in their deaf ear, were anonymized and extracted from their CI processors. Data for all available follow-up clinical appointments were included, ranging from two to six visits. Measures calculated from each datalog included frequency and duration of time the coil disconnected from the internal device, average daily CI use, and both duration (hr/day) and percentage of CI use (% daily use) in different intensity ranges and environment types. Linear mixed effects regression analyses were used to evaluate the relationships between CI experience, daily CI use, frequency of coil-offs, and duration of coil-off time. Nonlinear regression analyses were used to evaluate CI use with age in different acoustic environments. RESULTS Children with SSD used their CI on average 7.4 hr/day. Older children used their CI for longer periods of the day than younger children. Longitudinal data indicated consistent CI use from the date of CI activation. Frequency of coil-offs reduced with CI experience, but did not significantly contribute to hours of coil-off time. Children used their CI longest in environments that were moderately loud (50 to 70 dB A) and classified as containing speech-in-noise. Preschoolers tended to spend less time in quiet but more time in music than infants/toddlers and adolescents. CONCLUSIONS Children with SSD consistently use their CI upon activation in a variety of environments commonly experienced by children. CI use in children with SSD resembles reported bilateral hearing aid use in children but is longer than reported hearing aid use in children with less severe unilateral hearing loss, suggesting that (1) the normal-hearing ear did not detract from consistent CI use; and (2) a greater asymmetry between ears presents a significant impairment that may facilitate device use to access bilateral sound.
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Yang B, Wong E, Ho WH, Lau C, Chan YS, Wu EX. Reduction of sound-evoked midbrain responses observed by functional magnetic resonance imaging following acute acoustic noise exposure. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2018; 143:2184. [PMID: 29716239 DOI: 10.1121/1.5030920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Short duration and high intensity acoustic exposures can lead to temporary hearing loss and auditory nerve degeneration. This study investigates central auditory system function following such acute exposures after hearing loss recedes. Adult rats were exposed to 100 dB sound pressure level noise for 15 min. Auditory brainstem responses (ABRs) were recorded with click sounds to check hearing thresholds. Functional magnetic resonance imaging (fMRI) was performed with tonal stimulation at 12 and 20 kHz to investigate central auditory changes. Measurements were performed before exposure (0D), 7 days after (7D), and 14 days after (14D). ABRs show an ∼6 dB threshold shift shortly after exposure, but no significant threshold differences between 0D, 7D, and 14D. fMRI responses are observed in the lateral lemniscus (LL) and inferior colliculus (IC) of the midbrain. In the IC, responses to 12 kHz are 3.1 ± 0.3% (0D), 1.9 ± 0.3% (7D), and 2.9 ± 0.3% (14D) above the baseline magnetic resonance imaging signal. Responses to 20 kHz are 2.0 ± 0.2% (0D), 1.4 ± 0.2% (7D), and 2.1 ± 0.2% (14D). For both tones, responses at 7D are less than those at 0D (p < 0.01) and 14D (p < 0.05). In the LL, similar trends are observed. Acute exposure leads to functional changes in the auditory midbrain with timescale of weeks.
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Affiliation(s)
- Bin Yang
- Department of Physics, The City University of Hong Kong, Hong Kong, People's Republic of China
| | - Eddie Wong
- Department of Physics, The City University of Hong Kong, Hong Kong, People's Republic of China
| | - Wai Hong Ho
- Department of Physics, The City University of Hong Kong, Hong Kong, People's Republic of China
| | - Condon Lau
- Department of Physics, The City University of Hong Kong, Hong Kong, People's Republic of China
| | - Ying Shing Chan
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, People's Republic of China
| | - Ed X Wu
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, People's Republic of China
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Sokolov M, Cushing SL, Polonenko M, Blaser SI, Papsin BC, Gordon KA. Clinical Characteristics of Children With Single-Sided Deafness Presenting for Candidacy Assessment for Unilateral Cochlear Implantation. CURRENT OTORHINOLARYNGOLOGY REPORTS 2017. [DOI: 10.1007/s40136-017-0173-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Song JJ, Kim K, Sunwoo W, Mertens G, Van de Heyning P, De Ridder D, Vanneste S, Lee SY, Park KJ, Choi H, Choi JW. A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus. Front Hum Neurosci 2017; 11:210. [PMID: 28572760 PMCID: PMC5435818 DOI: 10.3389/fnhum.2017.00210] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 04/10/2017] [Indexed: 11/13/2022] Open
Abstract
The mechanism of tinnitus suppression after cochlear implantation (CI) in single-sided deafness (SSD) is not fully understood. In this regard, by comparing pre- and post-CI quantitative electroencephalography (qEEG), we explored cortical changes relevant to tinnitus improvement. In SSD patients who underwent CI, qEEG data were collected: (1) before CI, (2) 6 months post-operatively with CI-on, and (3) 30 min after CI-off and source-localized cortical activity/functional connectivity analyses were performed. Compared to the pre-operative baseline, the CI-on condition demonstrated significantly decreased activity in the right auditory- and orbitofrontal cortices (OFC) for the delta frequency band as well as decreased connectivity between the auditory cortex/posterior cingulate cortex for the delta/beta2 bands. Meanwhile, compared to the CI-off condition, the CI-on condition displayed decreased activity in the right auditory cortices/OFC for the delta band, and in bilateral auditory cortices, left inferior frontal cortex/OFC for the gamma band. However, qEEG analyses showed no significant differences between the CI-off and baseline conditions. CI induced overall decreased cortical activity and functional connectivity. However, judging from no differences between the CI-off and baseline conditions, CI-induced cortical activity and functional connectivity changes are not by cortical plastic changes, but by dynamic peripheral reafferentation.
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Affiliation(s)
- Jae-Jin Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University HospitalSeoul, South Korea
| | - Kyungsoo Kim
- Department of Information and Communication Engineering, Daegu Gyeongbuk Institute of Science and TechnologyDaegu, South Korea
| | - Woongsang Sunwoo
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University HospitalSeoul, South Korea
| | - Griet Mertens
- Department of Otorhinolaryngology and Head and Neck Surgery, University Hospital AntwerpEdegem, Belgium
| | - Paul Van de Heyning
- Department of Otorhinolaryngology and Head and Neck Surgery, University Hospital AntwerpEdegem, Belgium
| | - Dirk De Ridder
- Department of Surgical Sciences, Section of Neurosurgery, Dunedin School of Medicine, University of OtagoDunedin, New Zealand
| | - Sven Vanneste
- Lab for Clinical and Integrative Neuroscience, School of Behavioral and Brain Sciences, The University of Texas at Dallas, RichardsonTX, USA
| | - Sang-Youp Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University HospitalSeoul, South Korea
| | - Kyung-Joon Park
- Department of Information and Communication Engineering, Daegu Gyeongbuk Institute of Science and TechnologyDaegu, South Korea
| | - Hongsoo Choi
- Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and TechnologyDaegu, South Korea
| | - Ji-Woong Choi
- Department of Information and Communication Engineering, Daegu Gyeongbuk Institute of Science and TechnologyDaegu, South Korea
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18
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19
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Krishnan LA, Van Hyfte S. Management of unilateral hearing loss. Int J Pediatr Otorhinolaryngol 2016; 88:63-73. [PMID: 27497389 DOI: 10.1016/j.ijporl.2016.06.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 06/27/2016] [Accepted: 06/28/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVE A representative sample of literature regarding unilateral hearing loss (UHL) was reviewed to provide evidence of the effects of UHL and the intervention options available for children with UHL. Considerations during the assessment and management of children with UHL are illustrated using case illustrations. METHOD Research articles published from 2013 to 2015 were searched in the PubMed database using the keywords "unilateral hearing loss". Articles from 1950 to 2013 were included from a previous literature review on minimal hearing loss [1]. A retrospective review of charts of 14 children with UHL was also conducted. RESULTS The evidence indicates that children with UHL are more likely to have structural anomalies of the inner ear; may face challenges in six different domains, and have six intervention options available. Evidence also indicates that although some children appear to exhibit no delays or difficulties, others have significant challenges, some of which continue into adulthood. CONCLUSIONS Children with UHL have to be treated on a case-by-case basis. Parent education regarding UHL, its effects, and all available management options is critical so they can make informed decisions. Close monitoring and good communication between professionals in different domains is crucial in order to minimize the potential negative effects of UHL.
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Affiliation(s)
- Lata A Krishnan
- Purdue University, West Lafayette, Department of Speech, Language, and Hearing Sciences, Purdue University, 715 Clinic Drive, West Lafayette, IN 47907, USA.
| | - Shannon Van Hyfte
- Purdue University, West Lafayette, Department of Speech, Language, and Hearing Sciences, Purdue University, 715 Clinic Drive, West Lafayette, IN 47907, USA
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20
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Litovsky RY, Gordon K. Bilateral cochlear implants in children: Effects of auditory experience and deprivation on auditory perception. Hear Res 2016; 338:76-87. [PMID: 26828740 PMCID: PMC5647834 DOI: 10.1016/j.heares.2016.01.003] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 01/07/2016] [Accepted: 01/11/2016] [Indexed: 11/29/2022]
Abstract
Spatial hearing skills are essential for children as they grow, learn and play. These skills provide critical cues for determining the locations of sources in the environment, and enable segregation of important sounds, such as speech, from background maskers or interferers. Spatial hearing depends on availability of monaural cues and binaural cues. The latter result from integration of inputs arriving at the two ears from sounds that vary in location. The binaural system has exquisite mechanisms for capturing differences between the ears in both time of arrival and intensity. The major cues that are thus referred to as being vital for binaural hearing are: interaural differences in time (ITDs) and interaural differences in levels (ILDs). In children with normal hearing (NH), spatial hearing abilities are fairly well developed by age 4-5 years. In contrast, most children who are deaf and hear through cochlear implants (CIs) do not have an opportunity to experience normal, binaural acoustic hearing early in life. These children may function by having to utilize auditory cues that are degraded with regard to numerous stimulus features. In recent years there has been a notable increase in the number of children receiving bilateral CIs, and evidence suggests that while having two CIs helps them function better than when listening through a single CI, these children generally perform worse than their NH peers. This paper reviews some of the recent work on bilaterally implanted children. The focus is on measures of spatial hearing, including sound localization, release from masking for speech understanding in noise and binaural sensitivity using research processors. Data from behavioral and electrophysiological studies are included, with a focus on the recent work of the authors and their collaborators. The effects of auditory plasticity and deprivation on the emergence of binaural and spatial hearing are discussed along with evidence for reorganized processing from both behavioral and electrophysiological studies. The consequences of both unilateral and bilateral auditory deprivation during development suggest that the relevant set of issues is highly complex with regard to successes and the limitations experienced by children receiving bilateral cochlear implants. This article is part of a Special Issue entitled .
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Affiliation(s)
- Ruth Y Litovsky
- University of Wisconsin-Madison, 1500 Highland Ave, Madison, WI, 53705, United States.
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21
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Early-onset hearing loss reorganizes the visual and auditory network in children without cochlear implantation. Neuroreport 2016; 27:197-202. [DOI: 10.1097/wnr.0000000000000524] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Functional-structural reorganisation of the neuronal network for auditory perception in subjects with unilateral hearing loss: Review of neuroimaging studies. Hear Res 2016; 332:73-79. [DOI: 10.1016/j.heares.2015.11.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 11/26/2015] [Accepted: 11/26/2015] [Indexed: 11/18/2022]
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23
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Zhang GY, Yang M, Liu B, Huang ZC, Li J, Chen JY, Chen H, Zhang PP, Liu LJ, Wang J, Teng GJ. Changes of the directional brain networks related with brain plasticity in patients with long-term unilateral sensorineural hearing loss. Neuroscience 2015; 313:149-61. [PMID: 26621123 DOI: 10.1016/j.neuroscience.2015.11.042] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 11/16/2015] [Accepted: 11/18/2015] [Indexed: 10/22/2022]
Abstract
Previous studies often report that early auditory deprivation or congenital deafness contributes to cross-modal reorganization in the auditory-deprived cortex, and this cross-modal reorganization limits clinical benefit from cochlear prosthetics. However, there are inconsistencies among study results on cortical reorganization in those subjects with long-term unilateral sensorineural hearing loss (USNHL). It is also unclear whether there exists a similar cross-modal plasticity of the auditory cortex for acquired monaural deafness and early or congenital deafness. To address this issue, we constructed the directional brain functional networks based on entropy connectivity of resting-state functional MRI and researched changes of the networks. Thirty-four long-term USNHL individuals and seventeen normally hearing individuals participated in the test, and all USNHL patients had acquired deafness. We found that certain brain regions of the sensorimotor and visual networks presented enhanced synchronous output entropy connectivity with the left primary auditory cortex in the left long-term USNHL individuals as compared with normally hearing individuals. Especially, the left USNHL showed more significant changes of entropy connectivity than the right USNHL. No significant plastic changes were observed in the right USNHL. Our results indicate that the left primary auditory cortex (non-auditory-deprived cortex) in patients with left USNHL has been reorganized by visual and sensorimotor modalities through cross-modal plasticity. Furthermore, the cross-modal reorganization also alters the directional brain functional networks. The auditory deprivation from the left or right side generates different influences on the human brain.
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Affiliation(s)
- G-Y Zhang
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China; Department of Radiology, Taishan Medical University, Chang Cheng Road, Hi-Tech Development Zone, Taian 271016, Shandong Province, China.
| | - M Yang
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - B Liu
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - Z-C Huang
- Department of Otorhinolaryngology and Head-Neck Surgery, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - J Li
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - J-Y Chen
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - H Chen
- Department of Otorhinolaryngology and Head-Neck Surgery, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - P-P Zhang
- Department of Otorhinolaryngology and Head-Neck Surgery, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - L-J Liu
- Department of Physiology and Pharmacology, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - J Wang
- Department of Physiology and Pharmacology, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China; School of Human Communication Disorder, Dalhousie University, 1256 Barrington Street, Halifax B3J1Y6, Canada
| | - G-J Teng
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
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24
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Vila PM, Lieu JEC. Language Outcomes in Children With Unilateral Hearing Loss: A Review. ACTA ACUST UNITED AC 2015. [DOI: 10.1044/hhdc25.2.60] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Unilateral hearing loss (UHL) in children is only recently beginning to be widely appreciated as having a negative impact. We now understand that simply having one normal-hearing ear may not be sufficient for typical child development, and leads to impairments in speech and language outcomes. Unfortunately, UHL is not a rare problem among children in the United States, and is present among more than 1 out of every 10 of adolescents in this country. How UHL specifically affects development of speech and language, however, is currently not well understood. While we know that children with UHL are more likely than their normal-hearing siblings to have speech therapy and individualized education plans at school, we do not yet understand the mechanism through which UHL causes speech and language problems. The objective of this review is to describe what is currently known about the impact of UHL on speech and language development in children. Furthermore, we discuss some of the potential pathways through which the impact of unilateral hearing loss on speech and language might be mediated.
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Affiliation(s)
- Peter M. Vila
- Department of Otolaryngology - Head & Neck Surgery, Washington University School of Medicine in St. Louis
St. Louis, MO
| | - Judith E. C. Lieu
- Department of Otolaryngology - Head & Neck Surgery, Washington University School of Medicine in St. Louis
St. Louis, MO
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25
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Objective and Subjective Improvement of Hearing in Noise After Surgical Correction of Unilateral Congenital Aural Atresia in Pediatric Patients. Ear Hear 2015; 36:e183-9. [DOI: 10.1097/aud.0000000000000149] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Gordon K, Henkin Y, Kral A. Asymmetric Hearing During Development: The Aural Preference Syndrome and Treatment Options. Pediatrics 2015; 136:141-53. [PMID: 26055845 DOI: 10.1542/peds.2014-3520] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/09/2015] [Indexed: 11/24/2022] Open
Abstract
Deafness affects ∼2 in 1000 children and is one of the most common congenital impairments. Permanent hearing loss can be treated by fitting hearing aids. More severe to profound deafness is an indication for cochlear implantation. Although newborn hearing screening programs have increased the identification of asymmetric hearing loss, parents and caregivers of children with single-sided deafness are often hesitant to pursue therapy for the deaf ear. Delayed intervention has consequences for recovery of hearing. It has long been reported that asymmetric hearing loss/single-sided deafness compromises speech and language development and educational outcomes in children. Recent studies in animal models of deafness and in children consistently show evidence of an "aural preference syndrome" in which single-sided deafness in early childhood reorganizes the developing auditory pathways toward the hearing ear, with weaker central representation of the deaf ear. Delayed therapy consequently compromises benefit for the deaf ear, with slow rates of improvement measured over time. Therefore, asymmetric hearing needs early identification and intervention. Providing early effective stimulation in both ears through appropriate fitting of auditory prostheses, including hearing aids and cochlear implants, within a sensitive period in development has a cardinal role for securing the function of the impaired ear and for restoring binaural/spatial hearing. The impacts of asymmetric hearing loss on the developing auditory system and on spoken language development have often been underestimated. Thus, the traditional minimalist approach to clinical management aimed at 1 functional ear should be modified on the basis of current evidence.
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Affiliation(s)
- Karen Gordon
- Archie's Cochlear Implant Laboratory, The Hospital for Sick Children, Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, Canada;
| | - Yael Henkin
- Hearing, Speech, and Language Center, Sheba Medical Center, Tel Hashomer, Department of Communication Disorders, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; and
| | - Andrej Kral
- Cluster of Excellence Hearing4all, Institute of AudioNeuroTechnology, Hannover, Germany; Department of Experimental Otology, ENT Clinics, School of Medicine, Hannover Medical University, Hannover, Germany; and School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, Texas
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27
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Li Z, Zhu Q, Geng Z, Song Z, Wang L, Wang Y. Study of functional connectivity in patients with sensorineural hearing loss by using resting-state fMRI. Int J Clin Exp Med 2015; 8:569-578. [PMID: 25785031 PMCID: PMC4358486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 01/07/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To determine functional connectivity of the default mode network in patients with sensorineural hearing loss (SNHL) in resting state. METHODS The posterior cingulate cortex was selected as a seed for assessment of functional connectivity of the activated brain areas in resting state by using a seed-based correlation analysis of the resting state functional magnetic resonance imaging (fMRI) data. RESULTS The fMRI results demonstrated that, the healthy volunteers and the patients with NSHL shared certain activated brain areas with positive functional connectivity with region of interest (ROI). However, the healthy volunteers also had positive functional connectivity with ROI in bilateral middle temporal gyrus, left anterior cingulate cortex, right inferior parietal lobule and left medial superior frontal gyrus. While the patients with SNHL did with bilateral inferior parietal lobule, left medial superior frontal gyrus, right supramarginal gyrus, and left middle temporal gyrus. Compared to controls, patients with SNHL showed increased functional connectivity in the right posterior frontal lobe, right precentral gyrus, right supramarginal gyrus and left posterior cingulate cortex, and had decreased functional connectivity in the left lingual gyrus, right cuneus lobe and right superior frontal gyrus. CONCLUSION The posterior cingulate cortex, precuneus lobe, medial frontal gyrus, anterior cingulate cortex, temporal lobe, angular gyrus and inferior parietal lobule constitute a default mode of network in normal resting status. And patients with SNHL have abnormal functional connectivity of default mode network and cortical reorganisation in resting status.
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Affiliation(s)
- Zhengliang Li
- Department of Radiology, Second Hospital of Hebei Medical UniversityShijiazhuang, China
- Department of Radiology, Hebei Armed Police HospitalShijiazhuang, China
| | - Qingfeng Zhu
- Department of Radiology, Second Hospital of Hebei Medical UniversityShijiazhuang, China
| | - Zuojun Geng
- Department of Radiology, Second Hospital of Hebei Medical UniversityShijiazhuang, China
| | - Zhenhu Song
- Department of Radiology, Second Hospital of Hebei Medical UniversityShijiazhuang, China
| | - Lixin Wang
- Department of Radiology, Second Hospital of Hebei Medical UniversityShijiazhuang, China
| | - Ya Wang
- Department of Radiology, Second Hospital of Hebei Medical UniversityShijiazhuang, China
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28
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Zhang GY, Yang M, Liu B, Huang ZC, Chen H, Zhang PP, Li J, Chen JY, Liu LJ, Wang J, Teng GJ. Changes in the default mode networks of individuals with long-term unilateral sensorineural hearing loss. Neuroscience 2014; 285:333-42. [PMID: 25463518 DOI: 10.1016/j.neuroscience.2014.11.034] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 11/02/2014] [Accepted: 11/11/2014] [Indexed: 11/16/2022]
Abstract
Hearing impairment contributes to cognitive dysfunction. Previous studies have found changes of functional connectivity in the default mode network (DMN) associated with cognitive processing in individuals with sensorineural hearing loss (SNHL). Whereas the changes in the DMN in patients with long-term unilateral SNHL (USNHL) is still not entirely clear. In this work, we analyzed resting-state functional magnetic resonance imaging (fMRI) data and neuropsychological test scores from normal hearing subjects (n = 11) and patients (n = 21) with long-term USNHL. Functional connectivity and nodal topological properties were computed for every brain region in the DMN. Analysis of covariance (ANCOVA) and post hoc analyses were conducted to identify differences between normal controls and patients for each measure. Results indicated that the left USNHL presented enhanced connectivity (p < 0.05, false discovery rate (FDR) corrected), and significant changes (p < 0.05, Bonferroni corrected) of the nodal topological properties in the DMN compared with the control. More changes in the DMN have been found in the left than right long-term USNHL (RUSNHL). However, the neuropsychological tests did not show significant differences between the USNHL and the control. These findings suggest that long-term USNHL contributes to changes in the DMN, and these changes might affect cognitive abilities in patients with long-term USNHL. Left hearing loss affects the DMN more than the right hearing loss does. The fMRI measures might be more sensitive for observing cognitive changes in patients with hearing loss than clinical neuropsychological tests. This study provides some insights into the mechanisms of the association between hearing loss and cognitive function.
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Affiliation(s)
- G-Y Zhang
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China; Department of Radiology, Taishan Medical University, Chang Cheng Road, Hi-Tech Development Zone, Taian 271016, Shandong Province, China.
| | - M Yang
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - B Liu
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - Z-C Huang
- Department of Otorhinolaryngology and Head-neck Surgery, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - H Chen
- Department of Otorhinolaryngology and Head-neck Surgery, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - P-P Zhang
- Department of Otorhinolaryngology and Head-neck Surgery, Zhong-Da Hospital, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - J Li
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - J-Y Chen
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - L-J Liu
- Department of Physiology and Pharmacology, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - J Wang
- Department of Physiology and Pharmacology, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China; School of Human Communication Disorder, Dalhousie University, 1256 Barrington St, Halifax B3J1Y6, Canada
| | - G-J Teng
- Department of Radiology, Jiangsu Key Laboratory of Molecule Imaging and Functional Imaging, Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
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Boyd PJ. Potential benefits from cochlear implantation of children with unilateral hearing loss. Cochlear Implants Int 2014; 16:121-36. [DOI: 10.1179/1754762814y.0000000100] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Ryu NG, Moon IJ, Byun H, Jin SH, Park H, Jang KS, Cho YS. Clinical effectiveness of wireless CROS (contralateral routing of offside signals) hearing aids. Eur Arch Otorhinolaryngol 2014; 272:2213-9. [PMID: 24952106 DOI: 10.1007/s00405-014-3133-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 06/03/2014] [Indexed: 11/27/2022]
Abstract
This study evaluated the clinical effectiveness of wireless contralateral routing of offside signals hearing aids (CROS) in patients with severe to profound unilateral sensorineural hearing loss (USNHL). Twenty-one patients with USNHL were enrolled in this prospective study. The change of subjective satisfaction was evaluated using three questionnaires (K-HHIE, K-IOI-HA, K-SSQ). Changes in objective measurements were evaluated with sound localization test (SLT) and hearing in noise test (HINT). These tests were performed at pre-CROS fitting, 2 and 4 weeks after use of CROS. Subjects were grouped according to the age: young (<40 years) vs. old (≥40 years) group. The average K-HHIE and K-SSQ scores significantly improved with the use of CROS. SLT result revealed that hit rate and error degree improved in the young group and lateralization ability improved in both groups. In quiet environments, the reception threshold for speech also indicated a significant benefit in the young group. When the noise was presented to the normal ear, HINT revealed benefit of CROS, while loss of performance with CROS use was significant when noise was presented to the impaired ear. Wireless CROS provided increased satisfaction and overall improvement of localization and hearing. Although true binaural hearing cannot be obtained, CROS is a practical option for rehabilitation of USNHL.
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Affiliation(s)
- Nam-Gyu Ryu
- Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Centre, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, Korea
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Altered regional and circuit resting-state activity associated with unilateral hearing loss. PLoS One 2014; 9:e96126. [PMID: 24788317 PMCID: PMC4006821 DOI: 10.1371/journal.pone.0096126] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 04/03/2014] [Indexed: 01/20/2023] Open
Abstract
The deprivation of sensory input after hearing damage results in functional reorganization of the brain including cross-modal plasticity in the sensory cortex and changes in cognitive processing. However, it remains unclear whether partial deprivation from unilateral auditory loss (UHL) would similarly affect the neural circuitry of cognitive processes in addition to the functional organization of sensory cortex. Here, we used resting-state functional magnetic resonance imaging to investigate intrinsic activity in 34 participants with UHL from acoustic neuroma in comparison with 22 matched normal controls. In sensory regions, we found decreased regional homogeneity (ReHo) in the bilateral calcarine cortices in UHL. However, there was an increase of ReHo in the right anterior insular cortex (rAI), the key node of cognitive control network (CCN) and multimodal sensory integration, as well as in the left parahippocampal cortex (lPHC), a key node in the default mode network (DMN). Moreover, seed-based resting-state functional connectivity analysis showed an enhanced relationship between rAI and several key regions of the DMN. Meanwhile, lPHC showed more negative relationship with components in the CCN and greater positive relationship in the DMN. Such reorganizations of functional connectivity within the DMN and between the DMN and CCN were confirmed by a graph theory analysis. These results suggest that unilateral sensory input damage not only alters the activity of the sensory areas but also reshapes the regional and circuit functional organization of the cognitive control network.
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Language disorders in children with unilateral hearing loss: a systematic review. Int Arch Otorhinolaryngol 2013; 18:198-203. [PMID: 25992090 PMCID: PMC4297035 DOI: 10.1055/s-0033-1358580] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Accepted: 08/14/2013] [Indexed: 11/09/2022] Open
Abstract
Introduction Childhood is a critical period for language development and maturation of the central auditory system. Unilateral hearing loss (UHL) is considered a minimal impairment, and little is discussed regarding its impact on the development of language, communication, and school performance. Objectives A bibliographical survey of scientific articles published from 2001 to 2011 was performed to verify which language disorders can occur in children with UHL and which tests were performed to identify them. Data Synthesis Three databases were used: PubMed, Lilacs, and The Cochrane Library. As inclusion criteria, the articles should have samples of children with UHL, without other impairments, aged between 3 months and 12 years, and reference to language tests applied in this population. Out of 236 papers initially selected, only 5 met the inclusion criteria. In the articles studied, 12 tests were used for language assessment in children with UHL, out of which 9 were directed toward expressive language, and 3 toward receptive language. Children with UHL demonstrated lower scores on receptive and expressive language tests when compared with children with normal hearing. However, they obtained better scores on expressive language tests than children with bilateral hearing loss. Conclusion The findings of this survey showed that only a small number of studies used language tests in children with UHL or addressed language alterations resulting from this type of impairment. Therefore we emphasize the importance of investments in new studies on this subject to provide better explanations related to language difficulties presented by children with UHL.
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A review of unilateral hearing loss and academic performance: is it time to reassess traditional dogmata? Int J Pediatr Otorhinolaryngol 2013; 77:617-22. [PMID: 23474216 DOI: 10.1016/j.ijporl.2013.01.014] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 12/05/2012] [Accepted: 01/15/2013] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The aim of this paper was to review traditional approaches to habilitation of unilateral hearing losses as well as new research concerning management of unilateral hearing loss. DATA SOURCES Literature review/systematic review. REVIEW METHODS A PubMed search was performed for articles pertaining to unilateral hearing loss and academic loss and academic performance. Articles ranged in date from 1986 to 2012. Five resources were reviewed for content to determine the pertinence of the materials to the understanding of the history of diagnosis of unilateral hearing loss, the traditional treatment methods and their advantages and disadvantages, and more recent publications concerning academic outcomes for patients with unilateral hearing loss with and without treatment. RESULTS Unilateral hearing loss scan be detrimental to the academic success of children. Effects encompass not only auditory effects such as difficulty hearing in noise, but also self esteem and exhaustion. Although assistive devices were traditionally not offered as options, more recent literature suggests that devices such as BAHA, hearing aids, or FM systems may provide aids in the classroom and that early intervention may provide more favorable outcomes. CONCLUSION Since the 1980s, the approach to management of unilateral hearing losses has evolved. In order to maximize academic potential, treatment options should be discussed and implemented.
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Abstract
Long-term binaural auditory deprivation is associated with poorer speech recognition outcomes after cochlear implantation, even for postlingual hearing loss. It is, however, unknown to what extent the outcomes of implantation are related to the peripheral changes occurring monaurally or to changes at a higher level in the auditory system related to binaural deafness. This retrospective study aimed to unravel peripheral and central contributions to cochlear implantation outcomes by comparing outcomes obtained in individual ears for adults with long-term monaural auditory deprivation (i.e. unilateral use of hearing aid) who received bilateral cochlear implants. Results showed that similar outcomes can be obtained with the implant placed in the auditory-deprived or in the aided ear. This suggests that the peripheral changes related to monaural auditory deprivation have little effect on outcomes of cochlear implantation.
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Burton H, Firszt JB, Holden T, Agato A, Uchanski RM. Activation lateralization in human core, belt, and parabelt auditory fields with unilateral deafness compared to normal hearing. Brain Res 2012; 1454:33-47. [PMID: 22502976 DOI: 10.1016/j.brainres.2012.02.066] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 02/26/2012] [Indexed: 11/19/2022]
Abstract
We studied activation magnitudes in core, belt, and parabelt auditory cortex in adults with normal hearing (NH) and unilateral hearing loss (UHL) using an interrupted, single-event design and monaural stimulation with random spectrographic sounds. NH patients had one ear blocked and received stimulation on the side matching the intact ear in UHL. The objective was to determine whether the side of deafness affected lateralization and magnitude of evoked blood oxygen level-dependent responses across different auditory cortical fields (ACFs). Regardless of ear of stimulation, NH showed larger contralateral responses in several ACFs. With right ear stimulation in UHL, ipsilateral responses were larger compared to NH in core and belt ACFs, indicating neuroplasticity in the right hemisphere. With left ear stimulation in UHL, only posterior core ACFs showed larger ipsilateral responses, suggesting that most ACFs in the left hemisphere had greater resilience against reduced crossed inputs from a deafferented right ear. Parabelt regions located posterolateral to core and belt auditory cortex showed reduced activation in UHL compared to NH irrespective of RE/LE stimulation and lateralization of inputs. Thus, the effect in UHL compared to NH differed by ACF and ear of deafness.
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Affiliation(s)
- Harold Burton
- Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Cantlon JF, Davis SW, Libertus ME, Kahane J, Brannon EM, Pelphrey KA. Inter-Parietal White Matter Development Predicts Numerical Performance in Young Children. LEARNING AND INDIVIDUAL DIFFERENCES 2011; 21:672-680. [PMID: 22180720 DOI: 10.1016/j.lindif.2011.09.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In an effort to understand the role of interhemispheric transfer in numerical development, we investigated the relationship between children's developing knowledge of numbers and the integrity of their white matter connections between the cerebral hemispheres (the corpus callosum). We used diffusion tensor imaging (DTI) tractography analyses to test the link between the development of the corpus callosum and performance on symbolic and non-symbolic numerical judgment tasks. We were especially interested in the interhemispheric connections of parietal cortex in 6-year-old children, because regions of parietal cortex have been implicated in the development of numerical skills by several prior studies. Our results revealed significant structural differences between children and adults in the fibers of the corpus callosum connecting the left and right parietal lobes. Importantly, these structural differences were predictive of individual differences among children in performance on numerical judgment tasks: children with poor numerical performance relative to their peers exhibited reduced white matter coherence in the fibers passing through the isthmus of the corpus callosum, which connects the parietal hemispheres.
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Sevy ABG, Bortfeld H, Huppert TJ, Beauchamp MS, Tonini RE, Oghalai JS. Neuroimaging with near-infrared spectroscopy demonstrates speech-evoked activity in the auditory cortex of deaf children following cochlear implantation. Hear Res 2010; 270:39-47. [PMID: 20888894 DOI: 10.1016/j.heares.2010.09.010] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 09/24/2010] [Accepted: 09/26/2010] [Indexed: 10/19/2022]
Abstract
Cochlear implants (CI) are commonly used to treat deafness in young children. While many factors influence the ability of a deaf child who is hearing through a CI to develop speech and language skills, an important factor is that the CI has to stimulate the auditory cortex. Obtaining behavioral measurements from young children with CIs can often be unreliable. While a variety of noninvasive techniques can be used for detecting cortical activity in response to auditory stimuli, many have critical limitations when applied to the pediatric CI population. We tested the ability of near-infrared spectroscopy (NIRS) to detect cortical responses to speech stimuli in pediatric CI users. Neuronal activity leads to changes in blood oxy- and deoxy-hemoglobin concentrations that can be detected by measuring the transmission of near-infrared light through the tissue. To verify the efficacy of NIRS, we first compared auditory cortex responses measured with NIRS and fMRI in normal-hearing adults. We then examined four different participant cohorts with NIRS alone. Speech-evoked cortical activity was observed in 100% of normal-hearing adults (11 of 11), 82% of normal-hearing children (9 of 11), 78% of deaf children who have used a CI > 4 months (28 of 36), and 78% of deaf children who completed NIRS testing on the day of CI initial activation (7 of 9). Therefore, NIRS can measure cortical responses in pediatric CI users, and has the potential to be a powerful adjunct to current CI assessment tools.
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Affiliation(s)
- Alexander B G Sevy
- Bobby R. Alford Department of Otolaryngology - Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
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Abstract
Abstract
Although outcomes for children with cochlear implants have been the focus of investigation in the past 20 years, children with hearing loss in the mild-to severe range have received much less attention from researchers. This brief article discusses the current state of knowledge regarding children with all degrees of hearing loss.
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Affiliation(s)
- Melody Harrison
- Department of Master's Studies, University of North Carolina-Chapel Hill Chapel Hill, NC
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Benefits of Short Interimplant Delays in Children Receiving Bilateral Cochlear Implants. Otol Neurotol 2009; 30:319-31. [DOI: 10.1097/mao.0b013e31819a8f4c] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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40
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Asymmetry of Temporal Processing in Listeners With Normal Hearing and Unilaterally Deaf Subjects. Ear Hear 2008; 29:228-38. [DOI: 10.1097/aud.0b013e318164537b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gordon KA, Valero J, Papsin BC. Auditory brainstem activity in children with 9–30 months of bilateral cochlear implant use. Hear Res 2007; 233:97-107. [PMID: 17850999 DOI: 10.1016/j.heares.2007.08.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2007] [Revised: 07/29/2007] [Accepted: 08/01/2007] [Indexed: 10/23/2022]
Abstract
Bilateral cochlear implants aim to restore binaural processing along the auditory pathways in children with bilateral deafness. We assessed auditory brainstem activity evoked by single biphasic pulses delivered by an apical or basal electrode from the left, right and both cochlear implants in 13 children. Repeated measures were made over the first 9-30 months of bilateral implant use. In children with short or long periods of unilateral implant use prior to the second implantation, Wave eV of the auditory brainstem response was initially prolonged when evoked by the naïve versus experienced side. These differences tended to resolve in children first implanted <3 years of age but not in children implanted at older ages with long delays between implants. Latency differences were projected to persist for longer periods in children with long delays between implants compared with children with short delays. No differences in right versus left evoked eV latency were found in 2 children receiving bilateral implants simultaneously and their response latencies decreased over time. Binaural interaction responses showed effects of stimulating electrode position (responses were more detectable when evoked by an apical than basal pair of implant electrodes), and duration of delay between implants (measured by latency delays). The trends shown here suggest a negative impact of unilateral implant use on bilateral auditory brainstem plasticity.
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Affiliation(s)
- K A Gordon
- Cochlear Implant Laboratory, The Hospital for Sick Children, Room 6D08, 555 University Avenue, Toronto, ON, Canada M5G 1X8.
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