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Wu M, Wang Y, Zhao X, Xin T, Wu K, Liu H, Wu S, Liu M, Chai X, Li J, Wei C, Zhu C, Liu Y, Zhang YX. Anti-phasic oscillatory development for speech and noise processing in cochlear implanted toddlers. Child Dev 2024. [PMID: 38742715 DOI: 10.1111/cdev.14105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Human brain demonstrates amazing readiness for speech and language learning at birth, but the auditory development preceding such readiness remains unknown. Cochlear implanted (CI) children (n = 67; mean age 2.77 year ± 1.31 SD; 28 females) with prelingual deafness provide a unique opportunity to study this stage. Using functional near-infrared spectroscopy, it was revealed that the brain of CI children was irresponsive to sounds at CI hearing onset. With increasing CI experiences up to 32 months, the brain demonstrated function, region and hemisphere specific development. Most strikingly, the left anterior temporal lobe showed an oscillatory trajectory, changing in opposite phases for speech and noise. The study provides the first longitudinal brain imaging evidence for early auditory development preceding speech acquisition.
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Affiliation(s)
- Meiyun Wu
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
| | - Yuyang Wang
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha, China
| | - Xue Zhao
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
| | - Tianyu Xin
- Department of Otolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing, China
| | - Kun Wu
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
| | - Haotian Liu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology Head and Neck Surgery, West China Hospital of Sichuan University, Chengdu, China
| | - Shinan Wu
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
| | - Min Liu
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
| | - Xiaoke Chai
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
| | - Jinhong Li
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
| | - Chaogang Wei
- Department of Otolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing, China
| | - Chaozhe Zhu
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
| | - Yuhe Liu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yu-Xuan Zhang
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China
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2
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Yuan D, Tournis E, Ryan ME, Lai CM, Geng X, Young NM, Wong PCM. Early-stage use of hearing aids preserves auditory cortical structure in children with sensorineural hearing loss. Cereb Cortex 2024; 34:bhae145. [PMID: 38610087 PMCID: PMC11021813 DOI: 10.1093/cercor/bhae145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 03/18/2024] [Accepted: 03/20/2024] [Indexed: 04/14/2024] Open
Abstract
Hearing is critical to spoken language, cognitive, and social development. Little is known about how early auditory experiences impact the brain structure of children with bilateral sensorineural hearing loss. This study examined the influence of hearing aid use and residual hearing on the auditory cortex of children with severe to profound congenital sensorineural hearing loss. We evaluated cortical preservation in 103 young pediatric cochlear implant candidates (55 females and 48 males) by comparing their multivoxel pattern similarity of auditory cortical structure with that of 78 age-matched children with typical hearing. The results demonstrated that early-stage hearing aid use preserved the auditory cortex of children with bilateral congenital sensorineural hearing loss. Children with less residual hearing experienced a more pronounced advantage from hearing aid use. However, this beneficial effect gradually diminished after 17 months of hearing aid use. These findings support timely fitting of hearing aids in conjunction with early implantation to take advantage of neural preservation to maximize auditory and spoken language development.
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Affiliation(s)
- Di Yuan
- Brain and Mind Institute, The Chinese University of Hong Kong, 4F, Hui Yeung Shing Building, Shatin, N.T., Hong Kong SAR, China
- Department of Psychology, The Chinese University of Hong Kong, 3F, Sino Building Shatin, N.T., Hong Kong SAR, China
| | - Elizabeth Tournis
- Department of Audiology, Ann & Robert H. Lurie Children’s Hospital of Chicago, 225 E. Chicago Ave, Chicago, IL 60611, United States
| | - Maura E Ryan
- Department of Medical Imaging, Ann & Robert H. Lurie Children’s Hospital of Chicago, 225 E. Chicago Ave, Chicago, IL 60611, United States
- Department of Medical Imaging, Northwestern University Feinberg School of Medicine, 676 N. St. Clair St,Chicago, IL 60611, United States
| | - Ching Man Lai
- Brain and Mind Institute, The Chinese University of Hong Kong, 4F, Hui Yeung Shing Building, Shatin, N.T., Hong Kong SAR, China
| | - Xiujuan Geng
- Brain and Mind Institute, The Chinese University of Hong Kong, 4F, Hui Yeung Shing Building, Shatin, N.T., Hong Kong SAR, China
| | - Nancy M Young
- Division of Otolaryngology, Ann and Robert H Lurie Children’s Hospital of Chicago, 225 E. Chicago Ave, Chicago, IL 60611, United States
- Department of Otolaryngology–Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, 676 N St. Clair St, Chicago, IL 60611, United States
- Knowles Hearing Center, Department of Communication Sciences and Disorders, Northwestern University, 2240 Campus Drive, Evanston, IL 60208-3540, United States
| | - Patrick C M Wong
- Brain and Mind Institute, The Chinese University of Hong Kong, 4F, Hui Yeung Shing Building, Shatin, N.T., Hong Kong SAR, China
- Department of Linguistics and Modern Languages, The Chinese University of Hong Kong, G/F, Leung Kau Kui Building, Shatin, N.T., Hong Kong SAR, China
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3
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Medina AE, Foxworthy WA, Keum D, Meredith MA. Development of multisensory processing in ferret parietal cortex. Eur J Neurosci 2023; 58:3226-3238. [PMID: 37452674 PMCID: PMC10503439 DOI: 10.1111/ejn.16094] [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: 02/16/2023] [Revised: 06/20/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023]
Abstract
It is well known that the nervous system adjusts itself to its environment during development. Although a great deal of effort has been directed towards understanding the developmental processes of the individual sensory systems (e.g., vision, hearing, etc.), only one major study has examined the maturation of multisensory processing in cortical neurons. Therefore, the present investigation sought to evaluate multisensory development in a different cortical region and species. Using multiple single-unit recordings in anaesthetised ferrets (n = 18) of different ages (from postnatal day 80 to 300), we studied the responses of neurons from the rostral posterior parietal (PPr) area to presentations of visual, tactile and combined visual-tactile stimulation. The results showed that multisensory neurons were infrequent at the youngest ages (pre-pubertal) and progressively increased through the later ages. Significant response changes that result from multisensory stimulation (defined as multisensory integration [MSI]) were observed in post-pubertal adolescent animals, and the magnitude of these integrated responses also increased across this age group. Furthermore, non-significant multisensory response changes were progressively increased in adolescent animals. Collectively, at the population level, MSI was observed to shift from primarily suppressive levels in infants to increasingly higher levels in later stages. These data indicate that, like the unisensory systems from which it is derived, multisensory processing shows developmental changes whose specific time course may be regionally and species-dependent.
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Affiliation(s)
- Alexandre E. Medina
- Department of Pediatrics, University of Maryland, School of Medicine, Baltimore, MD
| | - W. Alex Foxworthy
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA
- Department of Biology, Eastern Shore Community College, Melfa, VA
| | - Dongil Keum
- Department of Pediatrics, University of Maryland, School of Medicine, Baltimore, MD
| | - M. Alex Meredith
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA
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4
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Yuan D, Ng IHY, Feng G, Chang WT, Tong MCF, Young NM, Wong PCM. The Extent of Hearing Input Affects the Plasticity of the Auditory Cortex in Children With Hearing Loss: A Preliminary Study. Am J Audiol 2023; 32:379-390. [PMID: 37080240 DOI: 10.1044/2023_aja-22-00172] [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: 04/22/2023] Open
Abstract
PURPOSE This study investigated to what extent residual hearing and rehabilitation options (e.g., hearing aids [HAs]) affect the auditory cortex in children with hearing loss. METHOD Twenty-one children with bilateral congenital sensorineural hearing loss who were candidates for cochlear implantation were recruited. Voxel-based morphometry analysis was conducted to assess the gray matter (GM) volume in the auditory cortex. Children's residual hearing was measured by pure-tone audiometry at different frequencies. Multiple linear regression models were conducted to examine the effects of residual hearing and the use of HAs on GM volume in the auditory cortex with the control of age and gender. RESULTS Children with more residual hearing at high frequencies had larger GM volume ratio (corrected by total intracranial volume) in the left Heschl's gyrus (r = -.545, p = .013). An interaction effect between residual hearing and the use of HAs suggested that the effect of residual hearing on GM ratio was moderated by the use of HAs (β = -.791, p = .020). Compared with children with less residual hearing, children who had more residual hearing benefited more from longer use of HAs in terms of a larger GM ratio. CONCLUSIONS Our preliminary findings highlight the impact of residual hearing on the neuroanatomy of the auditory cortex in children with hearing loss. Moreover, our results call for more auditory input via HAs for children with more residual hearing to preserve the auditory cortex before cochlear implantation. For children with less residual hearing who might receive limited benefit from HAs, an early cochlear implant would be necessary.
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Affiliation(s)
- Di Yuan
- Department of Psychology, The Chinese University of Hong Kong, Hong Kong SAR
- Brain and Mind Institute, The Chinese University of Hong Kong, Hong Kong SAR
| | - Iris H-Y Ng
- Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong, Hong Kong SAR
| | - Gangyi Feng
- Brain and Mind Institute, The Chinese University of Hong Kong, Hong Kong SAR
- Department of Linguistics and Modern Languages, The Chinese University of Hong Kong, Hong Kong SAR
| | - Wai Tsz Chang
- Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong, Hong Kong SAR
| | - Michael C F Tong
- Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong, Hong Kong SAR
| | - Nancy M Young
- Department of Otolaryngology-Head & Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Division of Otolaryngology-Head & Neck Surgery, Ann & Robert H. Lurie Children's Hospital of Chicago, IL
| | - Patrick C M Wong
- Brain and Mind Institute, The Chinese University of Hong Kong, Hong Kong SAR
- Department of Linguistics and Modern Languages, The Chinese University of Hong Kong, Hong Kong SAR
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5
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Analysis of outcomes for communication mode in cochlear implant in prelingually deafened adults. Auris Nasus Larynx 2023; 50:196-202. [PMID: 35710592 DOI: 10.1016/j.anl.2022.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/30/2022] [Accepted: 05/31/2022] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Recent studies have suggested that speech perception outcomes after cochlear implantation (CI) in prelingually deafened adults have improved with advances in CI technology and speech processing strategies. However, the outcomes vary from case to case. Communication mode has been reported in many studies as the factor that related to the post CI outcomes. This study aimed at investigating the post CI outcomes and the progress during 2 years for each communication mode. MATERIAL AND METHODS The subjects were 17 prelingually deafened adults undergoing CI at our hospital between April 2013 and March 2019. We investigated preoperative factors affecting post CI outcomes. Also we analyzed post CI outcomes for each communication mode and compared preoperative factors for each communication mode. RESULTS Communication mode and preoperative discrimination score were the factor affecting on postoperative discrimination score. The speech perception score after CI improved significantly in the oral and lip-reading group and total communication group. The speech perception scores in postlingually deafened adults improved significantly during the first six months and became to plateau after CI. On the other hand, the scores of prelingually deafened adults tended to improve gradually after six months postoperatively. Furthermore, the degree of improvement and progress differed by each communication mode. CONCLUSION The communication mode is important factors in predicting outcomes in prelingually deafened adults after CI. Long-term auditory training is important for prelingually deafened adults who use visual information as their preoperative method of communication.
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Palaniswami H, Abraham A, Yerraguntla K. Auditory cortical stimulability in non habilitated individuals – An evidence from CAEPs. J Otol 2022; 17:146-155. [PMID: 35847577 PMCID: PMC9270565 DOI: 10.1016/j.joto.2022.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/16/2022] [Accepted: 05/16/2022] [Indexed: 11/24/2022] Open
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Anderson CA, Cushing SL, Papsin BC, Gordon KA. Cortical imbalance following delayed restoration of bilateral hearing in deaf adolescents. Hum Brain Mapp 2022; 43:3662-3679. [PMID: 35429083 PMCID: PMC9294307 DOI: 10.1002/hbm.25875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 03/24/2022] [Accepted: 04/03/2022] [Indexed: 11/10/2022] Open
Abstract
Unilateral auditory deprivation in early childhood can lead to cortical strengthening of inputs from the stimulated side, yet the impact of this on bilateral processing when inputs are later restored beyond an early sensitive period is unknown. To address this, we conducted a longitudinal study with 13 bilaterally profoundly deaf adolescents who received unilateral access to sound via a cochlear implant (CI) in their right ear in early childhood before receiving bilateral access to sound a decade later via a second CI in their left ear. Auditory‐evoked cortical responses to unilateral and bilateral stimulation were measured repeatedly using electroencephalogram from 1 week to 14 months after activation of their second CI. Early cortical responses from the newly implanted ear and bilateral stimulation were atypically lateralized to the left ipsilateral auditory cortex. Duration of unilateral deafness predicted an unexpectedly stronger representation of inputs from the newly implanted, compared to the first implanted ear, in left auditory cortex. Significant initial reductions in responses were observed, yet a left‐hemisphere bias and unequal weighting of inputs favoring the long‐term deaf ear did not converge to a balanced state observed in the binaurally developed system. Bilateral response enhancement was significantly reduced in left auditory cortex suggesting deficits in ipsilateral response inhibition of new, dominant, inputs during bilateral processing. These findings paradoxically demonstrate the adaptive capacity of the adolescent auditory system beyond an early sensitive period for bilateral input, as well as restrictions on its potential to fully reverse cortical imbalances driven by long‐term unilateral deafness.
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Affiliation(s)
- Carly A. Anderson
- Archie's Cochlear Implant Laboratory The Hospital for Sick Children Toronto Ontario Canada
- Neurosciences and Mental Health, SickKids Research Institute Toronto Ontario Canada
| | - Sharon L. Cushing
- Department of Otolaryngology—Head and Neck Surgery The Hospital for Sick Children Toronto Ontario Canada
- Department of Otolaryngology—Head and Neck Surgery University of Toronto Toronto Ontario Canada
| | - Blake C. Papsin
- Department of Otolaryngology—Head and Neck Surgery The Hospital for Sick Children Toronto Ontario Canada
- Department of Otolaryngology—Head and Neck Surgery University of Toronto Toronto Ontario Canada
| | - Karen A. Gordon
- Archie's Cochlear Implant Laboratory The Hospital for Sick Children Toronto Ontario Canada
- Neurosciences and Mental Health, SickKids Research Institute Toronto Ontario Canada
- Department of Otolaryngology—Head and Neck Surgery The Hospital for Sick Children Toronto Ontario Canada
- Department of Otolaryngology—Head and Neck Surgery University of Toronto Toronto Ontario Canada
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8
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Abstract
The auditory cortex of people with sensorineural hearing loss can be re-afferented using a cochlear implant (CI): a neural prosthesis that bypasses the damaged cells in the cochlea to directly stimulate the auditory nerve. Although CIs are the most successful neural prosthesis to date, some CI users still do not achieve satisfactory outcomes using these devices. To explain variability in outcomes, clinicians and researchers have increasingly focused their attention on neuroscientific investigations that examined how the auditory cortices respond to the electric signals that originate from the CI. This chapter provides an overview of the literature that examined how the auditory cortex changes its functional properties in response to inputs from the CI, in animal models and in humans. We focus first on the basic responses to sounds delivered through electrical hearing and, next, we examine the integrity of two fundamental aspects of the auditory system: tonotopy and processing of binaural cues. When addressing the effects of CIs in humans, we also consider speech-evoked responses. We conclude by discussing to what extent this neuroscientific literature can contribute to clinical practices and help to overcome variability in outcomes.
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Affiliation(s)
- Francesco Pavani
- Center for Mind/Brain Sciences - CIMeC, University of Trento, Rovereto, Italy.
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9
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Gordon KA, Papsin BC, Papaioannou V, Cushing SL. The Importance of Access to Bilateral Hearing through Cochlear Implants in Children. Semin Hear 2021; 42:381-388. [PMID: 34912166 PMCID: PMC8660169 DOI: 10.1055/s-0041-1739371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Children with hearing loss require early access to sound in both ears to support their development. In this article, we describe barriers to providing bilateral hearing and developmental consequences of delays during early sensitive periods. Barriers include late identification of hearing loss in one or both ears and delayed access to intervention with hearing devices such as cochlear implants. Effects of delayed bilateral input on the auditory pathways and brain are discussed as well as behavioral effects on speech perception and other developmental outcomes including language and academics. Evidence for these effects has supported an evolution in cochlear implant candidacy in children that was started with unilateral implantation in children with profound deafness bilaterally to bilateral implantation to implantation of children with asymmetric hearing loss including children with single-side deafness. Opportunities to enhance the developmental benefits of bilateral hearing in children with hearing loss are also discussed including efforts to improve binaural/spatial hearing and consideration of concurrent vestibular deficits which are common in children with hearing loss.
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Affiliation(s)
- Karen A Gordon
- Archie's Cochlear Implant Laboratory, The Hospital for Sick Children, Toronto, Canada.,Department of Communication Disorders, The Hospital for Sick Children, Toronto, Canada.,Department of Otolaryngology - Head and Neck Surgery, University of Toronto, Toronto, Canada
| | - Blake C Papsin
- Archie's Cochlear Implant Laboratory, The Hospital for Sick Children, Toronto, Canada.,Department of Otolaryngology, The Hospital for Sick Children, Toronto, Canada.,Department of Otolaryngology - Head and Neck Surgery, University of Toronto, Toronto, Canada
| | - Vicky Papaioannou
- Department of Communication Disorders, The Hospital for Sick Children, Toronto, Canada.,Department of Otolaryngology, The Hospital for Sick Children, Toronto, Canada.,Department of Otolaryngology - Head and Neck Surgery, University of Toronto, Toronto, Canada
| | - Sharon L Cushing
- Archie's Cochlear Implant Laboratory, The Hospital for Sick Children, Toronto, Canada.,Department of Otolaryngology, The Hospital for Sick Children, Toronto, Canada.,Department of Otolaryngology - Head and Neck Surgery, University of Toronto, Toronto, Canada
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10
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Acoustically Enriched Environment during the Critical Period of Postnatal Development Positively Modulates Gap Detection and Frequency Discrimination Abilities in Adult Rats. Neural Plast 2021; 2021:6611922. [PMID: 33777134 PMCID: PMC7979287 DOI: 10.1155/2021/6611922] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/05/2021] [Accepted: 02/23/2021] [Indexed: 11/18/2022] Open
Abstract
Throughout life, sensory systems adapt to the sensory environment to provide optimal responses to relevant tasks. In the case of a developing system, sensory inputs induce changes that are permanent and detectable up to adulthood. Previously, we have shown that rearing rat pups in a complex acoustic environment (spectrally and temporally modulated sound) from postnatal day 14 (P14) to P28 permanently improves the response characteristics of neurons in the inferior colliculus and auditory cortex, influencing tonotopical arrangement, response thresholds and strength, and frequency selectivity, along with stochasticity and the reproducibility of neuronal spiking patterns. In this study, we used a set of behavioral tests based on a recording of the acoustic startle response (ASR) and its prepulse inhibition (PPI), with the aim to extend the evidence of the persistent beneficial effects of the developmental acoustical enrichment. The enriched animals were generally not more sensitive to startling sounds, and also, their PPI of ASR, induced by noise or pure tone pulses, was comparable to the controls. They did, however, exhibit a more pronounced PPI when the prepulse stimulus was represented either by a change in the frequency of a background tone or by a silent gap in background noise. The differences in the PPI of ASR between the enriched and control animals were significant at lower (55 dB SPL), but not at higher (65-75 dB SPL), intensities of background sound. Thus, rearing pups in the acoustically enriched environment led to an improvement of the frequency resolution and gap detection ability under more difficult testing conditions, i.e., with a worsened stimulus clarity. We confirmed, using behavioral tests, that an acoustically enriched environment during the critical period of development influences the frequency and temporal processing in the auditory system, and these changes persist until adulthood.
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11
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Cartocci G, Giorgi A, Inguscio BMS, Scorpecci A, Giannantonio S, De Lucia A, Garofalo S, Grassia R, Leone CA, Longo P, Freni F, Malerba P, Babiloni F. Higher Right Hemisphere Gamma Band Lateralization and Suggestion of a Sensitive Period for Vocal Auditory Emotional Stimuli Recognition in Unilateral Cochlear Implant Children: An EEG Study. Front Neurosci 2021; 15:608156. [PMID: 33767607 PMCID: PMC7985439 DOI: 10.3389/fnins.2021.608156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 02/01/2021] [Indexed: 12/21/2022] Open
Abstract
In deaf children, huge emphasis was given to language; however, emotional cues decoding and production appear of pivotal importance for communication capabilities. Concerning neurophysiological correlates of emotional processing, the gamma band activity appears a useful tool adopted for emotion classification and related to the conscious elaboration of emotions. Starting from these considerations, the following items have been investigated: (i) whether emotional auditory stimuli processing differs between normal-hearing (NH) children and children using a cochlear implant (CI), given the non-physiological development of the auditory system in the latter group; (ii) whether the age at CI surgery influences emotion recognition capabilities; and (iii) in light of the right hemisphere hypothesis for emotional processing, whether the CI side influences the processing of emotional cues in unilateral CI (UCI) children. To answer these matters, 9 UCI (9.47 ± 2.33 years old) and 10 NH (10.95 ± 2.11 years old) children were asked to recognize nonverbal vocalizations belonging to three emotional states: positive (achievement, amusement, contentment, relief), negative (anger, disgust, fear, sadness), and neutral (neutral, surprise). Results showed better performances in NH than UCI children in emotional states recognition. The UCI group showed increased gamma activity lateralization index (LI) (relative higher right hemisphere activity) in comparison to the NH group in response to emotional auditory cues. Moreover, LI gamma values were negatively correlated with the percentage of correct responses in emotion recognition. Such observations could be explained by a deficit in UCI children in engaging the left hemisphere for more demanding emotional task, or alternatively by a higher conscious elaboration in UCI than NH children. Additionally, for the UCI group, there was no difference between the CI side and the contralateral side in gamma activity, but a higher gamma activity in the right in comparison to the left hemisphere was found. Therefore, the CI side did not appear to influence the physiologic hemispheric lateralization of emotional processing. Finally, a negative correlation was shown between the age at the CI surgery and the percentage of correct responses in emotion recognition and then suggesting the occurrence of a sensitive period for CI surgery for best emotion recognition skills development.
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Affiliation(s)
- Giulia Cartocci
- Laboratory of Industrial Neuroscience, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy.,BrainSigns Srl, Rome, Italy
| | - Andrea Giorgi
- Laboratory of Industrial Neuroscience, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy.,BrainSigns Srl, Rome, Italy
| | - Bianca M S Inguscio
- BrainSigns Srl, Rome, Italy.,Cochlear Implant Unit, Department of Sensory Organs, Sapienza University of Rome, Rome, Italy
| | - Alessandro Scorpecci
- Audiology and Otosurgery Unit, "Bambino Gesù" Pediatric Hospital and Research Institute, Rome, Italy
| | - Sara Giannantonio
- Audiology and Otosurgery Unit, "Bambino Gesù" Pediatric Hospital and Research Institute, Rome, Italy
| | - Antonietta De Lucia
- Otology and Cochlear Implant Unit, Regional Referral Centre Children's Hospital "Santobono-Pausilipon", Naples, Italy
| | - Sabina Garofalo
- Otology and Cochlear Implant Unit, Regional Referral Centre Children's Hospital "Santobono-Pausilipon", Naples, Italy
| | - Rosa Grassia
- Department of Otolaryngology/Head and Neck Surgery, Monaldi Hospital, Naples, Italy
| | - Carlo Antonio Leone
- Department of Otolaryngology/Head and Neck Surgery, Monaldi Hospital, Naples, Italy
| | - Patrizia Longo
- Department of Otorhinolaryngology, University of Messina, Messina, Italy
| | - Francesco Freni
- Department of Otorhinolaryngology, University of Messina, Messina, Italy
| | | | - Fabio Babiloni
- Laboratory of Industrial Neuroscience, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy.,BrainSigns Srl, Rome, Italy.,Department of Computer Science and Technology, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou, China
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12
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Eskicioğlu E, Kirkim G, Gürkan S, Mungan Durankaya S, Başokçu TO, Güneri EA. Changes in P1 latencies of children with normal hearing and those with cochlear implants. Turk J Med Sci 2020; 50:1062-1068. [PMID: 32283893 PMCID: PMC7379475 DOI: 10.3906/sag-1910-233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 04/07/2020] [Indexed: 12/05/2022] Open
Abstract
Background/aim The aim of this study was to determine the age-related latency interval of P1 latencies of children with normal hearing, and to evaluate the P1 latency changes after surgery in children who underwent cochlear implantation. Materials and methods We evaluated 60 children with normal hearing and 16 children with cochlear implants aged 0–6 years using cortical auditory evoked potentials. P1 latencies were measured only once in the children with normal hearing, and on the postoperative first day, and the first, third, and sixth postoperative months in the children with cochlear implants. Results There was a statistically significant decrease in the P1 latencies as the age increased in children with normal hearing (P < 0.001). It was determined that when the external partof the cochlear implant was applied, the P1 latencies of children with cochlear implants were significantly longer than those of age-matched children with normal hearing (P < 0.001). This difference disappeared in 10 children with implants at the third and sixth months, but significant differences remained in 6 children. Conclusion P1 latency could be used as an objective tool to evaluate the normal development of auditory pathways, and may be helpful in the effective programming of children undergoing cochlear implantation.
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Affiliation(s)
- Emre Eskicioğlu
- Unit of Hearing, Speech and Balance, Department of Otorhinolaryngology, School of Medicine, Dokuz Eylül University, İzmir, Turkey
| | - Günay Kirkim
- Unit of Hearing, Speech and Balance, Department of Otorhinolaryngology, School of Medicine, Dokuz Eylül University, İzmir, Turkey
| | - Selhan Gürkan
- Unit of Hearing, Speech and Balance, Department of Otorhinolaryngology, School of Medicine, Dokuz Eylül University, İzmir, Turkey
| | - Serpil Mungan Durankaya
- Unit of Hearing, Speech and Balance, Department of Otorhinolaryngology, School of Medicine, Dokuz Eylül University, İzmir, Turkey
| | - Tahsin Oğuz Başokçu
- Department of Assessment and Evaluation in Education, School of Medicine, Ege University, İzmir, Turkey
| | - Enis Alpin Güneri
- Department of Otorhinolaryngology, School of Medicine, Dokuz Eylül University, İzmir, Turkey
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The Effect of Cochlear Implant Interval on Spoken Language Skills of Pediatric Bilateral Cochlear Implant Users. Otol Neurotol 2020; 40:e600-e605. [PMID: 31135675 DOI: 10.1097/mao.0000000000002245] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To examine the effects of cochlear implant (CI) interval (time between CI surgeries) on receptive vocabulary and receptive language skills for children with bilateral CIs. STUDY DESIGN A prospective cross-sectional study design. SETTING Participants were recruited from, and tested at, oral schools for the deaf and pediatric audiology clinics across the United States. PATIENTS Eighty-eight children, 4 to 9 years of age, with bilateral CIs and known hearing histories. Twenty-three participants received CIs simultaneously and 65 received CIs sequentially. Of those implanted sequentially, 86% wore a hearing aid (HA) on the non-implanted ear during the CI interval. INTERVENTION Bilateral cochlear implantation. MAIN OUTCOME MEASURES Receptive vocabulary was measured via the Peabody Picture Vocabulary Test (PPVT). Receptive language skills were measured via the Clinical Evaluation of Language Fundamentals (CELF). RESULTS Multiple linear regression models indicate better receptive vocabulary and receptive language skills are associated with earlier ages at first CI (CI 1), but not with shorter CI intervals. CONCLUSIONS Early cochlear implantation (i.e., age at CI 1) is critical for better receptive vocabulary and receptive language skills. Shorter CI intervals are not associated with better receptive vocabulary and receptive language skills for these 88 children, who nearly all used bimodal hearing during the interval. Use of a HA at the non-implanted ear, before receipt of a second CI (CI 2), may mitigate the effects of early bilateral auditory deprivation.
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Sharp A, Bacon BA, Champoux F. Enhanced tactile identification of musical emotion in the deaf. Exp Brain Res 2020; 238:1229-1236. [DOI: 10.1007/s00221-020-05789-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 03/18/2020] [Indexed: 10/24/2022]
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Early general development and central auditory system maturation in children with cochlear implants - A case series. Int J Pediatr Otorhinolaryngol 2019; 126:109625. [PMID: 31442872 DOI: 10.1016/j.ijporl.2019.109625] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 08/02/2019] [Accepted: 08/02/2019] [Indexed: 11/20/2022]
Abstract
OBJECTIVES A cochlear implant (CI) has the potential to improve the functioning of a deaf child in many aspects. Nevertheless, the dynamics of the general development, beyond the typically measured language abilities, directly after CI, is still unknown, especially if a child is implanted early. In this study we present a methodological framework for assessment of different domains of development, as well as the central auditory nervous system (CANS) maturation in infants and toddlers with a CI. METHODS Three children with bilateral congenital hearing loss and a unilateral CI, aged below 2.5 years, participated in a longitudinal study. Children were tested at three time points after cochlear implantation using the Polish Children Development Scale (CDS) consisting of a comprehensive battery of tests, as well as recordings of Cortical Auditory Evoked Potentials (CAEP). RESULTS All three children revealed gradual improvement in the overall CDS result as well as most of the CDS subscales. After 9 months of CI experience two younger children showed age-appropriate performance. In CAEP measurements a decrease of latency of the P1 component (an established biomarker of cortical auditory maturation) was observed in the same two children, with one achieving normal ranges of P1 latency after 9 months of CI use. CONCLUSIONS Our novel methodological framework can be successfully applied in small children with cochlear implants. It contributes to better understanding of the general development in early implanted children. The preliminary results indicate variability in children's performance in various developmental domains and thus the need to monitor the development of each child individually and holistically.
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López Ramón y Cajal C. Antenatal study of the Heschl’s gyrus: The first step to understanding prenatal learning. Med Hypotheses 2019; 130:109290. [DOI: 10.1016/j.mehy.2019.109290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 06/13/2019] [Accepted: 06/25/2019] [Indexed: 01/16/2023]
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Al-Shawi Y, Aldhwaihy LS, Bin Zuair AM, Alfallaj RM, Almuhawas F. After a first prelingually deaf child, does the family learn a lesson? Ann Saudi Med 2019; 39:350-353. [PMID: 31580711 PMCID: PMC6832318 DOI: 10.5144/0256-4947.2019.350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Congenital sensorineural hearing loss (SNHL) is a common disability in children. It can affect normal language development and educational achievement. Today, the time to cochlear implant is delayed for many children, which in turn delays intervention and impacts outcomes. Lack of knowledge and experience with congenital SNHL in the family are critical factors that can delay identification and intervention. OBJECTIVES Compare treatment seeking behavior in families for a first and second congenitally deaf child. DESIGN Analytical, cross-sectional using medical record data. SETTING Ear specialist hospital in Riyadh. SUBJECTS AND METHODS All patients who presented to the cochlear implant committee from March 2016 to March 2018 and met criteria were included in the study. Data on when the subjects presented to hospital and were approved for cochlear implant were retrieved from the patient files and through phone calls to the family. The age of first suspicion, audiological testing, diagnosis, hearing aid fitting, and the decision for cochlear implant were compared between the first and second child in families with multiple children with congenital SNHL. MAIN OUTCOME MEASURES The timing difference between the first and second deaf child in seeking treatment. SAMPLE SIZE 116 (58 pairs). RESULTS The second child was suspected to have hearing loss 13.6 months earlier than the first child and presented to the cochlear implant committee for final decision 16.7 months earlier than his\her sibling. Differences in the mean ages at suspicion of hearing loss, presentation to the hospital for audiological evaluation, hearing aid fitting, diagnosis, and decision for cochlear implant by cochlear implant committee were statistically significant ( P<.001). CONCLUSION Experience and knowledge has a major effect on early identification. We need to implement educational programs for the public to increase awareness of how to recognize a deaf child and what steps to take. LIMITATIONS Single-centered. CONFLICT OF INTEREST None.
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Affiliation(s)
- Yazeed Al-Shawi
- From the Department of Otolaryngology, King Abdullah Ear Specialist Center, King Saud University, Riyadh, Saudi Arabia
| | | | | | | | - Fida Almuhawas
- From the Department of Otolaryngology, King Abdullah Ear Specialist Center, King Saud University, Riyadh, Saudi Arabia
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18
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Malicka AN, Wilson WJ, Baer T, Munro KJ, Baker RJ, Miluzzi D, Moore BCJ. No evidence for enhanced processing of speech that is low-pass filtered near the edge frequency of cochlear dead regions in children. Int J Audiol 2018; 57:632-637. [PMID: 29688099 DOI: 10.1080/14992027.2018.1460496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
OBJECTIVES Cochlear dead regions (DRs) are regions in the cochlea where the inner hair cells and/or neurons are not functioning. Adults with extensive high-frequency DRs have enhanced abilities in processing sounds with frequencies just below the edge frequency, fedge, of the DR. It was assessed whether the same is true for children. DESIGN Performance was compared for children aged 8 to 13 years with: DRs (group DR), hearing impairment but without DRs (group NODR), and normal hearing (group NH). Seven ears in each group were tested. Each ear in the DR group was matched in age and low-frequency hearing with an ear in the NODR group, and in age with an ear in the NH group, giving seven "triplets". Within each triplet, the percent correct identification of vowel-consonant-vowel stimuli was measured using stimuli that were low-pass filtered at fedge and 0.67fedge, based on the ear with a DR. For the hearing-impaired ears, stimuli were given frequency-selective amplification as prescribed by DSL 4.1. RESULTS No significant differences in performance were found between groups for either low-pass cut-off frequency. CONCLUSION Unlike adults, the children with DRs did not show enhanced discrimination of speech stimuli with frequencies below fedge.
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Affiliation(s)
- Alicja N Malicka
- a School of Allied Health , La Trobe University , Bundoora , Australia.,b School of Health and Rehabilitation Sciences , The University of Queensland , Brisbane , Australia
| | - Wayne J Wilson
- b School of Health and Rehabilitation Sciences , The University of Queensland , Brisbane , Australia
| | - Thomas Baer
- c Department of Experimental Psychology , University of Cambridge , Cambridge , UK
| | - Kevin J Munro
- d Manchester Centre for Audiology and Deafness, School of Health Sciences , University of Manchester , Manchester , UK.,e Central Manchester University Hospitals NHS Foundation Trust , Manchester Academic Health Science Centre , Manchester , UK
| | - Richard J Baker
- d Manchester Centre for Audiology and Deafness, School of Health Sciences , University of Manchester , Manchester , UK
| | - Deanna Miluzzi
- b School of Health and Rehabilitation Sciences , The University of Queensland , Brisbane , Australia
| | - Brian C J Moore
- c Department of Experimental Psychology , University of Cambridge , Cambridge , UK
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Meuret S, Ludwig A, Predel D, Staske B, Fuchs M. Localization and Spatial Discrimination in Children and Adolescents with Moderate Sensorineural Hearing Loss Tested without Their Hearing Aids. Audiol Neurootol 2018; 22:326-342. [DOI: 10.1159/000485826] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 11/27/2017] [Indexed: 11/19/2022] Open
Abstract
The present study investigated two measures of spatial acoustic perception in children and adolescents with sensorineural hearing loss (SNHL) tested without their hearing aids and compared it to age-matched controls. Auditory localization was quantified by means of a sound source identification task and auditory spatial discrimination acuity by measuring minimum audible angles (MAA). Both low- and high-frequency noise bursts were employed in the tests to separately address spatial auditory processing based on interaural time and intensity differences. In SNHL children, localization (hit accuracy) was significantly reduced compared to normal-hearing children and intraindividual variability (dispersion) considerably increased. Given the respective impairments, the performance based on interaural time differences (low frequencies) was still better than that based on intensity differences (high frequencies). For MAA, age-matched comparisons yielded not only increased MAA values in SNHL children, but also no decrease with increasing age compared to normal-hearing children. Deficits in MAA were most apparent in the frontal azimuth. Thus, children with SNHL do not seem to benefit from frontal positions of the sound sources as do normal-hearing children. The results give an indication that the processing of spatial cues in SNHL children is restricted, which could also imply problems regarding speech understanding in challenging hearing situations.
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Intelligibility of the Patient's Speech Predicts the Likelihood of Cochlear Implant Success in Prelingually Deaf Adults. Ear Hear 2018; 37:e302-10. [PMID: 26928004 DOI: 10.1097/aud.0000000000000286] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The objective of this study was to determine the validity and clinical applicability of intelligibility of the patient's own speech, measured via a Vowel Identification Test (VOW), as a predictor of speech perception for prelingually deafened adults after 1 year of cochlear implant use. Specifically, the objective was to investigate the probability that a prelingually deaf patient, given a VOW score above (or below) a chosen cutoff point, reaches a postimplant speech perception score above (or below) a critical value. High predictive values for VOW could support preimplant counseling and implant candidacy decisions in individual patients. DESIGN One hundred and fifty-two adult cochlear implant candidates with prelingual hearing impairment or deafness took part as speakers in a VOW; 149 speakers completed the test successfully. Recordings of the speech stimuli, consisting of nonsense words of the form [h]-V-[t], where V represents one of 15 vowels/diphthongs ([(Equation is included in full-text article.)]), were presented to two normal-hearing listeners. VOW score was expressed as the percentage of vowels identified correctly (averaged over the 2 listeners). Subsequently, the 149 participants enrolled in the cochlear implant selection procedure. Extremely poor speakers were excluded from implantation, as well as patients who did not meet regular selection criteria as developed for postlingually deafened patients. From the 149 participants, 92 were selected for implantation. For the implanted group, speech perception data were collected at 1-year postimplantation. RESULTS Speech perception score at 1-year postimplantation (available for 77 of the 92 implanted participants) correlated positively with preimplant intelligibility of the patient's speech, as represented by VOW (r = 0.79, p < 0.00001): the more intelligible the patient's speech, the higher the predicted postimplant speech perception score. This correlation is explained by the hypothesis that the two variables have a common driving force, i.e., (in)adequacy of auditory speech input in the earliest years of life. With a 60% cutoff point, VOW can discriminate between individuals with "above-chance" postimplant speech perception and those with "chance level" postimplant speech perception with sensitivity and specificity of 0.84 and 0.86, respectively. The probability that a patient with a VOW score ≥ 60% achieves "above-chance" speech perception after implantation is 0.91. Conversely, the probability that a patient with VOW < 60% reaches "above-chance" speech perception is 0.25. CONCLUSIONS For prelingually deaf adults, intelligibility of the patient's speech-as represented by VOW-is a valid predictor of postimplant speech perception. A patient with a VOW score above a preset cutoff is much more likely to develop acceptable speech perception after implantation than a patient with a VOW score below that cutoff. The binary classification based on VOW and the associated probabilities of cochlear implant success in terms of speech perception can be used-in addition to existing criteria-to support the clinician in guiding patient expectations and in considering implant candidacy for individual patients.
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21
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Ngui LX, Tang IP, Rajan P, Prepageran N. Bilateral Simultaneous Cochlear Implant in Children and Adults—a Literature Review and Clinical Experience. CURRENT OTORHINOLARYNGOLOGY REPORTS 2017. [DOI: 10.1007/s40136-017-0165-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Merugumala SV, Pothula V, Cooper M. Barriers to timely diagnosis and treatment for children with hearing impairment in a southern Indian city: a qualitative study of parents and clinic staff. Int J Audiol 2017; 56:733-739. [DOI: 10.1080/14992027.2017.1340678] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Sri Vamshi Merugumala
- Brighton & Sussex Medical School, Brighton, UK,
- Barts and The London NHS Trust, London, UK, and
| | - Vijay Pothula
- Department of Otolaryngology, Wigan and Leigh NHS Foundation Trust, Wrightington, UK
| | - Max Cooper
- Brighton & Sussex Medical School, Brighton, UK,
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Silva LAF, Couto MIV, Magliaro FCL, Tsuji RK, Bento RF, de Carvalho ACM, Matas CG. Cortical maturation in children with cochlear implants: Correlation between electrophysiological and behavioral measurement. PLoS One 2017; 12:e0171177. [PMID: 28151961 PMCID: PMC5289550 DOI: 10.1371/journal.pone.0171177] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 01/17/2017] [Indexed: 11/18/2022] Open
Abstract
Central auditory pathway maturation in children depends on auditory sensory stimulation. The objective of the present study was to monitor the cortical maturation of children with cochlear implants using electrophysiological and auditory skills measurements. The study was longitudinal and consisted of 30 subjects, 15 (8 girls and 7 boys) of whom had a cochlear implant, with a mean age at activation time of 36.4 months (minimum, 17 months; maximum, 66 months), and 15 of whom were normal-hearing children who were matched based on gender and chronological age. The auditory and speech skills of the children with cochlear implants were evaluated using GASP, IT-MAIS and MUSS measures. Both groups underwent electrophysiological evaluation using long-latency auditory evoked potentials. Each child was evaluated at three and nine months after cochlear implant activation, with the same time interval adopted for the hearing children. The results showed improvements in auditory and speech skills as measured by IT-MAIS and MUSS. Similarly, the long-latency auditory evoked potential evaluation revealed a decrease in P1 component latency; however, the latency remained significantly longer than that of the hearing children, even after nine months of cochlear implant use. It was observed that a shorter P1 latency corresponded to more evident development of auditory skills. Regarding auditory behavior, it was observed that children who could master the auditory skill of discrimination showed better results in other evaluations, both behavioral and electrophysiological, than those who had mastered only the speech-detection skill. Therefore, cochlear implant auditory stimulation facilitated auditory pathway maturation, which decreased the latency of the P1 component and advanced the development of auditory and speech skills. The analysis of the long-latency auditory evoked potentials revealed that the P1 component was an important biomarker of auditory development during the rehabilitation process.
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Affiliation(s)
| | | | | | - Robinson Koji Tsuji
- Department of Otorhinolaryngology, Clinical Hospital, FMUSP, São Paulo (SP), Brazil
| | | | | | - Carla Gentile Matas
- Department of Physical, Speech and Occupational, FMUSP, São Paulo (SP), Brazil
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Kral A, Yusuf PA, Land R. Higher-order auditory areas in congenital deafness: Top-down interactions and corticocortical decoupling. Hear Res 2017; 343:50-63. [DOI: 10.1016/j.heares.2016.08.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 07/25/2016] [Accepted: 08/29/2016] [Indexed: 11/16/2022]
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25
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Leijon SC, Peyda S, Magnusson AK. Temporal processing capacity in auditory-deprived superior paraolivary neurons is rescued by sequential plasticity during early development. Neuroscience 2016; 337:315-330. [DOI: 10.1016/j.neuroscience.2016.09.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 09/01/2016] [Accepted: 09/09/2016] [Indexed: 01/04/2023]
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26
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Koh DXP, Sng JCG. HDAC1 negatively regulates Bdnf and Pvalb required for parvalbumin interneuron maturation in an experience-dependent manner. J Neurochem 2016; 139:369-380. [PMID: 27534825 DOI: 10.1111/jnc.13773] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 06/24/2016] [Accepted: 08/10/2016] [Indexed: 01/29/2023]
Abstract
During early postnatal development, neuronal circuits are sculpted by sensory experience provided by the external environment. This experience-dependent regulation of circuitry development consolidates the balance of excitatory-inhibitory (E/I) neurons in the brain. The cortical barrel-column that innervates a single principal whisker is used to provide a clear reference frame for studying the consolidation of E/I circuitry. Sensory deprivation of S1 at birth disrupts the consolidation of excitatory-inhibitory balance by decreasing inhibitory transmission of parvalbumin interneurons. The molecular mechanisms underlying this decrease in inhibition are not completely understood. Our findings show that epigenetic mechanisms, in particular histone deacetylation by histone deacetylases, negatively regulate the expression of brain-derived neurotrophic factor (Bdnf) and parvalbumin (Pvalb) genes during development, which are required for the maturation of parvalbumin interneurons. After whisker deprivation, increased histone deacetylase 1 expression and activity led to increased histone deacetylase 1 binding and decreased histone acetylation at Bdnf promoters I-IV and Pvalb promoter, resulting in the repression of Bdnf and Pvalb gene transcription. The decrease in Bdnf expression further affected parvalbumin interneuron maturation at layer II/III in S1, demonstrated by decreased parvalbumin expression, a marker for parvalbumin interneuron maturation. Knockdown of HDAC1 recovered Bdnf and Pvalb gene transcription and also prevented the decrease of inhibitory synapses accompanying whisker deprivation.
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Affiliation(s)
- Dawn X P Koh
- National University of Singapore, Graduate School of Integrative Sciences and Engineering, Singapore, Singapore.,Singapore Institute of Clinical Sciences (SICS), A*STAR, Brenner Centre for Molecular Medicine, Singapore, Singapore.,Department of Pharmacology, National University of Singapore, Yong Loo Lin School of Medicine, Singapore, Singapore
| | - Judy C G Sng
- Singapore Institute of Clinical Sciences (SICS), A*STAR, Brenner Centre for Molecular Medicine, Singapore, Singapore. .,Department of Pharmacology, National University of Singapore, Yong Loo Lin School of Medicine, Singapore, Singapore.
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Ajallouyan M, Radfar S, Nouhi S, Tavallaie SA, Amirsalari S, Yousefi J, Hasanali Fard M. Consanguinity Among Parents of Iranian Deaf Children. IRANIAN RED CRESCENT MEDICAL JOURNAL 2016; 18:e22038. [PMID: 28191326 PMCID: PMC5292111 DOI: 10.5812/ircmj.22038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 04/12/2015] [Accepted: 05/18/2015] [Indexed: 11/16/2022]
Abstract
Background It seems that there is a relationship between consanguinity and profound hearing loss but there is little data about the association of consanguinity and hearing loss in Iran. Objectives The aim of this study is to demonstrate the causes of profound bilateral sensorineural hearing loss among Iranian samples who are candidates for cochlear implantation. Methods This study was retrospective, analytical, and designed to collect information about profound hearing impaired cases referred to the Baqiyatallah Cochlear implantation center using enumeration. A total of 310 children with profound hearing impairments participated in this study. They were aged from 6 months to 4 years old. The study was done between January 2007 and April 2009. Chi-square tests were used to show whether there was any statistical difference between the incidence of marital consanguinity of their parents and the normal population. Results Sixty-five percent of those 310 children had parents who had married with their relatives. Of the 203 (65%) parents that had consanguineous marriages, 132 were first cousins, which includes the children of two brothers (37 [11.8%] patrilateral parallel cousins), the children of two sisters (38 [12.2%] multi-lateral parallel cousins), or the children of a brother and a sister (57 [18.3%] cross cousins). Fifty-four (17.4%) of the parents were second cousins and 17 (5.2%) were beyond second cousins. Also, hearing loss etiology was obvious in 237 (76.3%) of the patients with profound hearing loss but was unknown in 73 (23.7%). Hereditary was identified as the most common cause in 33% of the cases. Conclusions Our data demonstrated a 65% occurrence of consanguineous marriage among the parents of deaf children, which is statistically different from the percentage of consanguineous marriage among Iranian population (38%). This indicates an obvious relationship between severe hearing loss and consanguineous marriage.
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Affiliation(s)
- Mohammad Ajallouyan
- New Hearing Technologies Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran
| | - Shokofeh Radfar
- New Hearing Technologies Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran
- Corresponding Author: Shokofeh Radfar, New Hearing Technologies Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran. Tel: +98-9128300711, E-mail:
| | - Sima Nouhi
- New Hearing Technologies Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran
| | - Seid Abbas Tavallaie
- New Hearing Technologies Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran
| | - Susan Amirsalari
- New Hearing Technologies Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran
| | - Jaleh Yousefi
- New Hearing Technologies Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran
| | - Mahdieh Hasanali Fard
- New Hearing Technologies Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran
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Connelly CJ, Ryugo DK, Muniak MA. The effect of progressive hearing loss on the morphology of endbulbs of Held and bushy cells. Hear Res 2016; 343:14-33. [PMID: 27473502 DOI: 10.1016/j.heares.2016.07.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/15/2016] [Accepted: 07/18/2016] [Indexed: 10/21/2022]
Abstract
Studies of congenital and early-onset deafness have demonstrated that an absence of peripheral sound-evoked activity in the auditory nerve causes pathological changes in central auditory structures. The aim of this study was to establish whether progressive acquired hearing loss could lead to similar brain changes that would degrade the precision of signal transmission. We used complementary physiologic hearing tests and microscopic techniques to study the combined effect of both magnitude and duration of hearing loss on one of the first auditory synapses in the brain, the endbulb of Held (EB), along with its bushy cell (BC) target in the anteroventral cochlear nucleus. We compared two hearing mouse strains (CBA/Ca and heterozygous shaker-2+/-) against a model of early-onset progressive hearing loss (DBA/2) and a model of congenital deafness (homozygous shaker-2-/-), examining each strain at 1, 3, and 6 months of age. Furthermore, we employed a frequency model of the mouse cochlear nucleus to constrain our analyses to regions most likely to exhibit graded changes in hearing function with time. No significant differences in the gross morphology of EB or BC structure were observed in 1-month-old animals, indicating uninterrupted development. However, in animals with hearing loss, both EBs and BCs exhibited a graded reduction in size that paralleled the hearing loss, with the most severe pathology seen in deaf 6-month-old shaker-2-/- mice. Ultrastructural pathologies associated with hearing loss were less dramatic: minor changes were observed in terminal size but mitochondrial fraction and postsynaptic densities remained relatively stable. These results indicate that acquired progressive hearing loss can have consequences on auditory brain structure, with prolonged loss leading to greater pathologies. Our findings suggest a role for early intervention with assistive devices in order to mitigate long-term pathology and loss of function.
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Affiliation(s)
- Catherine J Connelly
- Hearing Research Unit, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia; School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW 2052, Australia.
| | - David K Ryugo
- Hearing Research Unit, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia; School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW 2052, Australia; Department of Otolaryngology, Head, Neck & Skull Base Surgery, St Vincent's Hospital, Sydney, NSW 2010, Australia
| | - Michael A Muniak
- Hearing Research Unit, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia
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Rousset A, Dowell R, Leigh J. Receptive language as a predictor of cochlear implant outcome for prelingually deaf adults. Int J Audiol 2016; 55 Suppl 2:S24-30. [PMID: 27160793 DOI: 10.3109/14992027.2016.1157269] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE This study investigated outcomes and predictive factors, specifically language skills, for a group of prelingually hearing-impaired adults who received a cochlear implant. DESIGN Speech perception data, demographic information, and other related variables such as communication mode, residual hearing, and receptive language abilities were explored. Pre- and post-implant speech perception scores were compared and multiple regression analysis was used to identify significant predictive relationships. STUDY SAMPLE The study included 43 adults with a prelingual onset of hearing loss, who proceeded with cochlear implantation at the Royal Victorian Eye and Ear Hospital in Melbourne, Australia. RESULTS The majority of patients experienced benefit from their cochlear implants, with 88% demonstrating significant improvement in speech perception performance. Volunteers achieved better post-operative speech perception scores if they had a shorter duration of severe-to-profound hearing loss, better language skills, and used an exclusively oral communication mode. CONCLUSIONS Although post-operative speech perception performance is significantly poorer for prelingually hearing-impaired adults compared to postlingually hearing-impaired patients, the study group demonstrated significant benefit from their cochlear implants. The variability in post-operative outcomes can be predicted to some extent from the hearing history and language abilities of the individual patient.
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Affiliation(s)
- Alexandra Rousset
- a Cochlear Implant Clinic, Royal Victorian Eye and Ear Hospital , Melbourne , Australia .,b The University of Melbourne , Australia , and.,c The Cooperative Research Centre for Cochlear Implant and Hearing Aid Innovation , Melbourne , Australia
| | - Richard Dowell
- a Cochlear Implant Clinic, Royal Victorian Eye and Ear Hospital , Melbourne , Australia .,b The University of Melbourne , Australia , and.,c The Cooperative Research Centre for Cochlear Implant and Hearing Aid Innovation , Melbourne , Australia
| | - Jaime Leigh
- a Cochlear Implant Clinic, Royal Victorian Eye and Ear Hospital , Melbourne , Australia .,b The University of Melbourne , Australia , and.,c The Cooperative Research Centre for Cochlear Implant and Hearing Aid Innovation , Melbourne , Australia
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Moran M, Rousset A, Looi V. Music appreciation and music listening in prelingual and postlingually deaf adult cochlear implant recipients. Int J Audiol 2016; 55 Suppl 2:S57-63. [DOI: 10.3109/14992027.2016.1157630] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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31
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Somatic memory and gain increase as preconditions for tinnitus: Insights from congenital deafness. Hear Res 2016; 333:37-48. [DOI: 10.1016/j.heares.2015.12.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 11/27/2015] [Accepted: 12/18/2015] [Indexed: 11/19/2022]
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Hosoya M, Fujioka M, Ogawa K, Okano H. Distinct Expression Patterns Of Causative Genes Responsible For Hereditary Progressive Hearing Loss In Non-Human Primate Cochlea. Sci Rep 2016; 6:22250. [PMID: 26915689 PMCID: PMC4768099 DOI: 10.1038/srep22250] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 02/10/2016] [Indexed: 12/18/2022] Open
Abstract
Hearing impairment is the most frequent sensory deficit in humans. Deafness genes, which harbor pathogenic mutations that have been identified in families with hereditary hearing loss, are commonly expressed in the auditory end organ or the cochlea and may contribute to normal hearing function, yet some of the mouse models carrying these mutations fail to recapitulate the hearing loss phenotype. In this study, we find that distinct expression patterns of those deafness genes in the cochlea of a non-human primate, the common marmoset (Callithrix jacchus). We examined 20 genes whose expression in the cochlea has already been reported. The deafness genes GJB3, CRYM, GRHL2, DFNA5, and ATP6B1 were expressed in marmoset cochleae in patterns different from those in mouse cochleae. Of note, all those genes are causative for progressive hearing loss in humans, but not in mice. The other tested genes, including the deafness gene COCH, in which mutation recapitulates deafness in mice, were expressed in a similar manner in both species. The result suggests that the discrepancy in the expression between rodents and primates may account for the phenotypic difference. This limitation of the rodent models can be bypassed by using non-human primate models such as the marmoset.
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Affiliation(s)
- Makoto Hosoya
- Keio University School of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, 35 Shinanomachi Shinjyuku-ku Tokyo, 160-8582, Japan
| | - Masato Fujioka
- Keio University School of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, 35 Shinanomachi Shinjyuku-ku Tokyo, 160-8582, Japan
| | - Kaoru Ogawa
- Keio University School of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, 35 Shinanomachi Shinjyuku-ku Tokyo, 160-8582, Japan
| | - Hideyuki Okano
- Keio University School of Medicine, Department of Physiology, 35 Shinanomachi Shinjyuku-ku Tokyo, 160-8582, Japan
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Cross-Modal and Intra-Modal Characteristics of Visual Function and Speech Perception Performance in Postlingually Deafened, Cochlear Implant Users. PLoS One 2016; 11:e0148466. [PMID: 26848755 PMCID: PMC4743927 DOI: 10.1371/journal.pone.0148466] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 01/17/2016] [Indexed: 11/25/2022] Open
Abstract
Evidence of visual-auditory cross-modal plasticity in deaf individuals has been widely reported. Superior visual abilities of deaf individuals have been shown to result in enhanced reactivity to visual events and/or enhanced peripheral spatial attention. The goal of this study was to investigate the association between visual-auditory cross-modal plasticity and speech perception in post-lingually deafened, adult cochlear implant (CI) users. Post-lingually deafened adults with CIs (N = 14) and a group of normal hearing, adult controls (N = 12) participated in this study. The CI participants were divided into a good performer group (good CI, N = 7) and a poor performer group (poor CI, N = 7) based on word recognition scores. Visual evoked potentials (VEP) were recorded from the temporal and occipital cortex to assess reactivity. Visual field (VF) testing was used to assess spatial attention and Goldmann perimetry measures were analyzed to identify differences across groups in the VF. The association of the amplitude of the P1 VEP response over the right temporal or occipital cortex among three groups (control, good CI, poor CI) was analyzed. In addition, the association between VF by different stimuli and word perception score was evaluated. The P1 VEP amplitude recorded from the right temporal cortex was larger in the group of poorly performing CI users than the group of good performers. The P1 amplitude recorded from electrodes near the occipital cortex was smaller for the poor performing group. P1 VEP amplitude in right temporal lobe was negatively correlated with speech perception outcomes for the CI participants (r = -0.736, P = 0.003). However, P1 VEP amplitude measures recorded from near the occipital cortex had a positive correlation with speech perception outcome in the CI participants (r = 0.775, P = 0.001). In VF analysis, CI users showed narrowed central VF (VF to low intensity stimuli). However, their far peripheral VF (VF to high intensity stimuli) was not different from the controls. In addition, the extent of their central VF was positively correlated with speech perception outcome (r = 0.669, P = 0.009). Persistent visual activation in right temporal cortex even after CI causes negative effect on outcome in post-lingual deaf adults. We interpret these results to suggest that insufficient intra-modal (visual) compensation by the occipital cortex may cause negative effects on outcome. Based on our results, it appears that a narrowed central VF could help identify CI users with poor outcomes with their device.
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Nolte A, Coninx F, Müller F, Hess M, Wiesner T, Dudek N, Rohlfs AK. Frequency-specific Animal Sound Test (FAST) 4: A valid method for hearing screening. Int J Pediatr Otorhinolaryngol 2016; 81:68-79. [PMID: 26810294 DOI: 10.1016/j.ijporl.2015.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 12/09/2015] [Accepted: 12/11/2015] [Indexed: 12/19/2022]
Abstract
OBJECTIVES It is essential to monitor hearing status in children not only as a mandatory requirement during universal newborn hearing screening (UNHS), but also later during preschool and school-age development. The present study considers the appropriateness of the Frequency-specific Animal Sound Test (FAST4) for use in children between the ages of 2.5 and 10 years; the comparability of hearing thresholds determined using FAST4 and those measured by pure tone audiometry (PTA); and the clinical and diagnostic utility of FAST4 in a variety of pediatric settings. METHODS 322 children aged 2.6-14.1 years and 41 adults were tested with FAST4. Four animal sounds were presented via headphones and a hearing threshold was determined for the high and low frequency range. In addition, the hearing threshold of each child was measured by PTA. RESULTS Results were analyzed from 156 normal-hearing and hearing-impaired children, mostly above the age of 4 years. In general, FAST4 yielded hearing levels comparable with those from PTA in children and in adults. FAST4 frequently had to be halted prematurely in children under 4 years old. CONCLUSIONS FAST4 is a strong candidate for use as an instrument for preschool hearing screening and offers several advantages over other hearing tests. FAST4 permits simple, swift and efficient determination of the hearing threshold and the test can be administered by staff without specialist training. A number of improvements have already been integrated into the successor model known as mFAST.
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Affiliation(s)
- Antonia Nolte
- Department of Voice, Speech and Hearing Disorders, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Frans Coninx
- Institute for Audiopedagogics, University of Cologne, Solingen, Germany
| | - Frank Müller
- Department of Voice, Speech and Hearing Disorders, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Markus Hess
- Department of Voice, Speech and Hearing Disorders, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Wiesner
- Department of Phoniatrics and Pediatric Audiology, Werner Otto Institut, Hamburg, Germany
| | - Nikolas Dudek
- Comprehensive School Uellendahl-Katernberg, Wuppertal, Germany
| | - Anna-Katharina Rohlfs
- Department of Voice, Speech and Hearing Disorders, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Auditory Cortical Maturation in a Child with Cochlear Implant: Analysis of Electrophysiological and Behavioral Measures. Case Rep Otolaryngol 2015; 2015:890508. [PMID: 26881163 PMCID: PMC4736011 DOI: 10.1155/2015/890508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 12/16/2015] [Indexed: 12/05/2022] Open
Abstract
The purpose of this study was to longitudinally assess the behavioral and electrophysiological hearing changes of a girl inserted in a CI program, who had bilateral profound sensorineural hearing loss and underwent surgery of cochlear implantation with electrode activation at 21 months of age. She was evaluated using the P1 component of Long Latency Auditory Evoked Potential (LLAEP); speech perception tests of the Glendonald Auditory Screening Procedure (GASP); Infant Toddler Meaningful Auditory Integration Scale (IT-MAIS); and Meaningful Use of Speech Scales (MUSS). The study was conducted prior to activation and after three, nine, and 18 months of cochlear implant activation. The results of the LLAEP were compared with data from a hearing child matched by gender and chronological age. The results of the LLAEP of the child with cochlear implant showed gradual decrease in latency of the P1 component after auditory stimulation (172 ms–134 ms). In the GASP, IT-MAIS, and MUSS, gradual development of listening skills and oral language was observed. The values of the LLAEP of the hearing child were expected for chronological age (132 ms–128 ms). The use of different clinical instruments allow a better understanding of the auditory habilitation and rehabilitation process via CI.
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Cardin V, Smittenaar RC, Orfanidou E, Rönnberg J, Capek CM, Rudner M, Woll B. Differential activity in Heschl's gyrus between deaf and hearing individuals is due to auditory deprivation rather than language modality. Neuroimage 2015; 124:96-106. [PMID: 26348556 DOI: 10.1016/j.neuroimage.2015.08.073] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 08/23/2015] [Accepted: 08/24/2015] [Indexed: 10/23/2022] Open
Abstract
Sensory cortices undergo crossmodal reorganisation as a consequence of sensory deprivation. Congenital deafness in humans represents a particular case with respect to other types of sensory deprivation, because cortical reorganisation is not only a consequence of auditory deprivation, but also of language-driven mechanisms. Visual crossmodal plasticity has been found in secondary auditory cortices of deaf individuals, but it is still unclear if reorganisation also takes place in primary auditory areas, and how this relates to language modality and auditory deprivation. Here, we dissociated the effects of language modality and auditory deprivation on crossmodal plasticity in Heschl's gyrus as a whole, and in cytoarchitectonic region Te1.0 (likely to contain the core auditory cortex). Using fMRI, we measured the BOLD response to viewing sign language in congenitally or early deaf individuals with and without sign language knowledge, and in hearing controls. Results show that differences between hearing and deaf individuals are due to a reduction in activation caused by visual stimulation in the hearing group, which is more significant in Te1.0 than in Heschl's gyrus as a whole. Furthermore, differences between deaf and hearing groups are due to auditory deprivation, and there is no evidence that the modality of language used by deaf individuals contributes to crossmodal plasticity in Heschl's gyrus.
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Affiliation(s)
- Velia Cardin
- Deafness, Cognition and Language Research Centre, 49 Gordon Square, University College London, London WC1H 0BT, UK; Linnaeus Centre HEAD, Swedish Institute for Disability Research, Department of Behavioural Sciences and Learning, Linköping University, Sweden.
| | - Rebecca C Smittenaar
- Experimental Psychology, 26 Bedford Way, University College London, London WC1H 0AP, UK
| | - Eleni Orfanidou
- Deafness, Cognition and Language Research Centre, 49 Gordon Square, University College London, London WC1H 0BT, UK; School of Psychology, University of Crete, Greece
| | - Jerker Rönnberg
- Linnaeus Centre HEAD, Swedish Institute for Disability Research, Department of Behavioural Sciences and Learning, Linköping University, Sweden
| | - Cheryl M Capek
- School of Psychological Sciences, University of Manchester, Manchester M13 9PL, UK
| | - Mary Rudner
- Linnaeus Centre HEAD, Swedish Institute for Disability Research, Department of Behavioural Sciences and Learning, Linköping University, Sweden
| | - Bencie Woll
- Deafness, Cognition and Language Research Centre, 49 Gordon Square, University College London, London WC1H 0BT, UK
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Wu C, Huang L, Tan H, Wang Y, Zheng H, Kong L, Zheng W. Diffusion tensor imaging and MR spectroscopy of microstructural alterations and metabolite concentration changes in the auditory neural pathway of pediatric congenital sensorineural hearing loss patients. Brain Res 2014; 1639:228-34. [PMID: 25536303 DOI: 10.1016/j.brainres.2014.12.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 11/29/2014] [Accepted: 12/09/2014] [Indexed: 11/28/2022]
Abstract
PURPOSE Our objective was to evaluate age-dependent changes in microstructure and metabolism in the auditory neural pathway, of children with profound sensorineural hearing loss (SNHL), and to differentiate between good and poor surgical outcome cochlear implantation (CI) patients by using diffusion tensor imaging (DTI) and magnetic resonance spectroscopy (MRS). MATERIALS AND METHODS Ninety-two SNHL children (49 males, 43 females; mean age, 4.9 years) were studied by conventional MR imaging, DTI and MRS. Patients were divided into three groups: Group A consisted of children≤1 years old (n=20), Group B consisted of children 1-3 years old (n=31), and group C consisted of children 3-14 years old (n=41). Among the 31 patients (19 males and 12 females, 12m- 14y ) with CI, 18 patients (mean age 4.8±0.7 years) with a categories of auditory performance (CAP) score over five were classified into the good outcome group and 13 patients (mean age, 4.4±0.7 years) with a CAP score below five were classified into the poor outcome group. Two DTI parameters, fractional anisotropy (FA) and apparent diffusion coefficient (ADC), were measured in the superior temporal gyrus (STG) and auditory radiation. Regions of interest for metabolic change measurements were located inside the STG. DTI values were measured based on region-of-interest analysis and MRS values for correlation analysis with CAP scores. RESULTS Compared with healthy individuals, 92 SNHL patients displayed decreased FA values in the auditory radiation and STG (p<0.05). Only decreased FA values in the auditory radiation was observed in Group A. Decreased FA values in the auditory radiation and STG were both observed in B and C groups. However, in Group C, the N-acetyl aspartate/creatinine ratio in the STG was also significantly decreased (p<0.05). Correlation analyses at 12 months post-operation revealed strong correlations between the FA, in the auditory radiation, and CAP scores (r=0.793, p<0.01). CONCLUSIONS DTI and MRS can be used to evaluate microstructural alterations and metabolite concentration changes in the auditory neural pathway that are not detectable by conventional MR imaging. The observed changes in FA suggest that children with SNHL have a developmental delay in myelination in the auditory neural pathway, and it also display greater metabolite concentration changes in the auditory cortex in older children, suggest that early cochlear implantation might be more effective in restoring hearing in children with SNHL. This article is part of a Special Issue entitled SI: Brain and Memory.
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Affiliation(s)
- Chunxiao Wu
- The Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - Lexing Huang
- The Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - Hui Tan
- The Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - Yanting Wang
- The Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - Hongyi Zheng
- The Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - Lingmei Kong
- The Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - Wenbin Zheng
- The Second Affiliated Hospital, Medical College of Shantou University, Shantou, China.
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Wanrooij K, Boersma P, van Zuijen TL. Distributional vowel training is less effective for adults than for infants. A study using the mismatch response. PLoS One 2014; 9:e109806. [PMID: 25289935 PMCID: PMC4188590 DOI: 10.1371/journal.pone.0109806] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 09/12/2014] [Indexed: 11/24/2022] Open
Abstract
Distributional learning of speech sounds (i.e., learning from simple exposure to frequency distributions of speech sounds in the environment) has been observed in the lab repeatedly in both infants and adults. The current study is the first attempt to examine whether the capacity for using the mechanism is different in adults than in infants. To this end, a previous event-related potential study that had shown distributional learning of the English vowel contrast /æ/∼/ε/ in 2-to-3-month old Dutch infants was repeated with Dutch adults. Specifically, the adults were exposed to either a bimodal distribution that suggested the existence of the two vowels (as appropriate in English), or to a unimodal distribution that did not (as appropriate in Dutch). After exposure the participants were tested on their discrimination of a representative [æ] and a representative [ε], in an oddball paradigm for measuring mismatch responses (MMRs). Bimodally trained adults did not have a significantly larger MMR amplitude, and hence did not show significantly better neural discrimination of the test vowels, than unimodally trained adults. A direct comparison between the normalized MMR amplitudes of the adults with those of the previously tested infants showed that within a reasonable range of normalization parameters, the bimodal advantage is reliably smaller in adults than in infants, indicating that distributional learning is a weaker mechanism for learning speech sounds in adults (if it exists in that group at all) than in infants.
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Affiliation(s)
- Karin Wanrooij
- Amsterdam Center for Language and Communication, University of Amsterdam, Amsterdam, The Netherlands
| | - Paul Boersma
- Amsterdam Center for Language and Communication, University of Amsterdam, Amsterdam, The Netherlands
| | - Titia L. van Zuijen
- Research Institute of Child Development and Education, University of Amsterdam, Amsterdam, The Netherlands
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Sharma A, Campbell J, Cardon G. Developmental and cross-modal plasticity in deafness: evidence from the P1 and N1 event related potentials in cochlear implanted children. Int J Psychophysiol 2014; 95:135-44. [PMID: 24780192 DOI: 10.1016/j.ijpsycho.2014.04.007] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 04/15/2014] [Accepted: 04/17/2014] [Indexed: 11/15/2022]
Abstract
Cortical development is dependent on extrinsic stimulation. As such, sensory deprivation, as in congenital deafness, can dramatically alter functional connectivity and growth in the auditory system. Cochlear implants ameliorate deprivation-induced delays in maturation by directly stimulating the central nervous system, and thereby restoring auditory input. The scenario in which hearing is lost due to deafness and then reestablished via a cochlear implant provides a window into the development of the central auditory system. Converging evidence from electrophysiologic and brain imaging studies of deaf animals and children fitted with cochlear implants has allowed us to elucidate the details of the time course for auditory cortical maturation under conditions of deprivation. Here, we review how the P1 cortical auditory evoked potential (CAEP) provides useful insight into sensitive period cut-offs for development of the primary auditory cortex in deaf children fitted with cochlear implants. Additionally, we present new data on similar sensitive period dynamics in higher-order auditory cortices, as measured by the N1 CAEP in cochlear implant recipients. Furthermore, cortical re-organization, secondary to sensory deprivation, may take the form of compensatory cross-modal plasticity. We provide new case-study evidence that cross-modal re-organization, in which intact sensory modalities (i.e., vision and somatosensation) recruit cortical regions associated with deficient sensory modalities (i.e., auditory) in cochlear implanted children may influence their behavioral outcomes with the implant. Improvements in our understanding of developmental neuroplasticity in the auditory system should lead to harnessing central auditory plasticity for superior clinical technique.
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Affiliation(s)
- Anu Sharma
- Brain and Behavior Laboratory, Speech Language and Hearing Sciences, University of Colorado at Boulder, United States; Institute of Cognitive Science, University of Colorado at Boulder, United States.
| | - Julia Campbell
- Brain and Behavior Laboratory, Speech Language and Hearing Sciences, University of Colorado at Boulder, United States
| | - Garrett Cardon
- Brain and Behavior Laboratory, Speech Language and Hearing Sciences, University of Colorado at Boulder, United States
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Mowery TM, Kotak VC, Sanes DH. Transient Hearing Loss Within a Critical Period Causes Persistent Changes to Cellular Properties in Adult Auditory Cortex. Cereb Cortex 2014; 25:2083-94. [PMID: 24554724 DOI: 10.1093/cercor/bhu013] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Sensory deprivation can induce profound changes to central processing during developmental critical periods (CPs), and the recovery of normal function is maximal if the sensory input is restored during these epochs. Therefore, we asked whether mild and transient hearing loss (HL) during discrete CPs could induce changes to cortical cellular physiology. Electrical and inhibitory synaptic properties were obtained from auditory cortex pyramidal neurons using whole-cell recordings after bilateral earplug insertion or following earplug removal. Varying the age of HL onset revealed brief CPs of vulnerability for membrane and firing properties, as well as, inhibitory synaptic currents. These CPs closed 1 week after ear canal opening on postnatal day (P) 18. To examine whether the cellular properties could recover from HL, earplugs were removed prior to (P17) or after (P23), the closure of these CPs. The earlier age of hearing restoration led to greater recovery of cellular function, but firing rate remained disrupted. When earplugs were removed after the closure of these CPs, several changes persisted into adulthood. Therefore, long-lasting cellular deficits that emerge from transient deprivation during a CP may contribute to delayed acquisition of auditory skills in children who experience temporary HL.
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Affiliation(s)
| | | | - Dan H Sanes
- Center for Neural Science Department of Biology, New York University, New York, NY 10003, USA
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Kral A, Heid S, Hubka P, Tillein J. Unilateral hearing during development: hemispheric specificity in plastic reorganizations. Front Syst Neurosci 2013; 7:93. [PMID: 24348345 PMCID: PMC3841817 DOI: 10.3389/fnsys.2013.00093] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 11/05/2013] [Indexed: 02/04/2023] Open
Abstract
The present study investigates the hemispheric contributions of neuronal reorganization following early single-sided hearing (unilateral deafness). The experiments were performed on ten cats from our colony of deaf white cats. Two were identified in early hearing screening as unilaterally congenitally deaf. The remaining eight were bilaterally congenitally deaf, unilaterally implanted at different ages with a cochlear implant. Implanted animals were chronically stimulated using a single-channel portable signal processor for two to five months. Microelectrode recordings were performed at the primary auditory cortex under stimulation at the hearing and deaf ear with bilateral cochlear implants. Local field potentials (LFPs) were compared at the cortex ipsilateral and contralateral to the hearing ear. The focus of the study was on the morphology and the onset latency of the LFPs. With respect to morphology of LFPs, pronounced hemisphere-specific effects were observed. Morphology of amplitude-normalized LFPs for stimulation of the deaf and the hearing ear was similar for responses recorded at the same hemisphere. However, when comparisons were performed between the hemispheres, the morphology was more dissimilar even though the same ear was stimulated. This demonstrates hemispheric specificity of some cortical adaptations irrespective of the ear stimulated. The results suggest a specific adaptation process at the hemisphere ipsilateral to the hearing ear, involving specific (down-regulated inhibitory) mechanisms not found in the contralateral hemisphere. Finally, onset latencies revealed that the sensitive period for the cortex ipsilateral to the hearing ear is shorter than that for the contralateral cortex. Unilateral hearing experience leads to a functionally-asymmetric brain with different neuronal reorganizations and different sensitive periods involved.
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Affiliation(s)
- Andrej Kral
- Cluster of Excellence, Department of Experimental Otology, Institute of Audioneurotechnology, ENT Clinics, Hannover Medical School Hannover, Germany
| | - Silvia Heid
- Cluster of Excellence, Department of Experimental Otology, Institute of Audioneurotechnology, ENT Clinics, Hannover Medical School Hannover, Germany ; Department of Physiology and Otolaryngology, J. W. Goethe University Frankfurt am Main, Germany
| | - Peter Hubka
- Cluster of Excellence, Department of Experimental Otology, Institute of Audioneurotechnology, ENT Clinics, Hannover Medical School Hannover, Germany
| | - Jochen Tillein
- Cluster of Excellence, Department of Experimental Otology, Institute of Audioneurotechnology, ENT Clinics, Hannover Medical School Hannover, Germany ; Department of Physiology and Otolaryngology, J. W. Goethe University Frankfurt am Main, Germany
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Butler BE, Lomber SG. Functional and structural changes throughout the auditory system following congenital and early-onset deafness: implications for hearing restoration. Front Syst Neurosci 2013; 7:92. [PMID: 24324409 PMCID: PMC3840613 DOI: 10.3389/fnsys.2013.00092] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 11/03/2013] [Indexed: 11/23/2022] Open
Abstract
The absence of auditory input, particularly during development, causes widespread changes in the structure and function of the auditory system, extending from peripheral structures into auditory cortex. In humans, the consequences of these changes are far-reaching and often include detriments to language acquisition, and associated psychosocial issues. Much of what is currently known about the nature of deafness-related changes to auditory structures comes from studies of congenitally deaf or early-deafened animal models. Fortunately, the mammalian auditory system shows a high degree of preservation among species, allowing for generalization from these models to the human auditory system. This review begins with a comparison of common methods used to obtain deaf animal models, highlighting the specific advantages and anatomical consequences of each. Some consideration is also given to the effectiveness of methods used to measure hearing loss during and following deafening procedures. The structural and functional consequences of congenital and early-onset deafness have been examined across a variety of mammals. This review attempts to summarize these changes, which often involve alteration of hair cells and supporting cells in the cochleae, and anatomical and physiological changes that extend through subcortical structures and into cortex. The nature of these changes is discussed, and the impacts to neural processing are addressed. Finally, long-term changes in cortical structures are discussed, with a focus on the presence or absence of cross-modal plasticity. In addition to being of interest to our understanding of multisensory processing, these changes also have important implications for the use of assistive devices such as cochlear implants.
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Affiliation(s)
- Blake E. Butler
- Cerebral Systems Laboratory, Department of Physiology and Pharmacology, Brain and Mind Institute, University of Western OntarioLondon, ON, Canada
| | - Stephen G. Lomber
- Cerebral Systems Laboratory, Department of Physiology and Pharmacology and Department of Psychology, National Centre for Audiology, Brain and Mind Institute, University of Western OntarioLondon, ON, Canada
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Gordon KA, Jiwani S, Papsin BC. Benefits and detriments of unilateral cochlear implant use on bilateral auditory development in children who are deaf. Front Psychol 2013; 4:719. [PMID: 24137143 PMCID: PMC3797443 DOI: 10.3389/fpsyg.2013.00719] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 09/18/2013] [Indexed: 12/04/2022] Open
Abstract
We have explored both the benefits and detriments of providing electrical input through a cochlear implant in one ear to the auditory system of young children. A cochlear implant delivers electrical pulses to stimulate the auditory nerve, providing children who are deaf with access to sound. The goals of implantation are to restrict reorganization of the deprived immature auditory brain and promote development of hearing and spoken language. It is clear that limiting the duration of deprivation is a key factor. Additional considerations are the onset, etiology, and use of residual hearing as each of these can have unique effects on auditory development in the pre-implant period. New findings show that many children receiving unilateral cochlear implants are developing mature-like brainstem and thalamo-cortical responses to sound with long term use despite these sources of variability; however, there remain considerable abnormalities in cortical function. The most apparent, determined by implanting the other ear and measuring responses to acute stimulation, is a loss of normal cortical response from the deprived ear. Recent data reveal that this can be avoided in children by early implantation of both ears simultaneously or with limited delay. We conclude that auditory development requires input early in development and from both ears.
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Affiliation(s)
- Karen A. Gordon
- Archie’s Cochlear Implant Laboratory, The Hospital for Sick ChildrenToronto, ON, Canada
- Institute of Medical Sciences, Faculty of Medicine, University of TorontoToronto, ON, Canada
- Department of Otolaryngology – Head and Neck surgery, Faculty of Medicine, University of TorontoToronto, ON, Canada
| | - Salima Jiwani
- Archie’s Cochlear Implant Laboratory, The Hospital for Sick ChildrenToronto, ON, Canada
- Institute of Medical Sciences, Faculty of Medicine, University of TorontoToronto, ON, Canada
| | - Blake C. Papsin
- Archie’s Cochlear Implant Laboratory, The Hospital for Sick ChildrenToronto, ON, Canada
- Department of Otolaryngology – Head and Neck surgery, Faculty of Medicine, University of TorontoToronto, ON, Canada
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Smith SS. The influence of stress at puberty on mood and learning: role of the α4βδ GABAA receptor. Neuroscience 2013; 249:192-213. [PMID: 23079628 PMCID: PMC3586385 DOI: 10.1016/j.neuroscience.2012.09.065] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 09/21/2012] [Accepted: 09/25/2012] [Indexed: 11/22/2022]
Abstract
It is well-known that the onset of puberty is associated with changes in mood as well as cognition. Stress can have an impact on these outcomes, which in many cases, can be more influential in females, suggesting that gender differences exist. The adolescent period is a vulnerable time for the onset of certain psychopathologies, including anxiety disorders, depression and eating disorders, which are also more prevalent in females. One factor which may contribute to stress-triggered anxiety at puberty is the GABAA receptor (GABAR), which is known to play a pivotal role in anxiety. Expression of α4βδ GABARs increases on the dendrites of CA1 pyramidal cells at the onset of puberty in the hippocampus, part of the limbic circuitry which governs emotion. This receptor is a sensitive target for the stress steroid 3α-OH-5[α]β-pregnan-20-one or [allo]pregnanolone, which paradoxically reduces inhibition and increases anxiety during the pubertal period (post-natal day ∼35-44) of female mice in contrast to its usual effect to enhance inhibition and reduce anxiety. Spatial learning and synaptic plasticity are also adversely impacted at puberty, likely a result of increased expression of α4βδ GABARs on the dendritic spines of CA1 hippocampal pyramidal cells, which are essential for consolidation of memory. This review will focus on the role of these receptors in mediating behavioral changes at puberty. Stress-mediated changes in mood and cognition in early adolescence may have relevance for the expression of psychopathologies in adulthood.
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Affiliation(s)
- S S Smith
- Department of Physiology and Pharmacology, SUNY Downstate Medical Center, 450 Clarkson Avenue, Brooklyn, NY 11203, USA.
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Jiwani S, Papsin BC, Gordon KA. Central auditory development after long-term cochlear implant use. Clin Neurophysiol 2013; 124:1868-80. [DOI: 10.1016/j.clinph.2013.03.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 02/27/2013] [Accepted: 03/08/2013] [Indexed: 11/26/2022]
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Kral A. Auditory critical periods: A review from system’s perspective. Neuroscience 2013; 247:117-33. [DOI: 10.1016/j.neuroscience.2013.05.021] [Citation(s) in RCA: 173] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 05/07/2013] [Accepted: 05/08/2013] [Indexed: 11/17/2022]
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Sharma A, Glick H, Campbell J, Biever A. CENTRAL AUDTIORY DEVELOPMENT IN CHILDREN WITH HEARING LOSS: CLINICAL RELEVANCE OF THE P1 CAEP BIOMARKER IN HEARING-IMPAIRED CHILDREN WITH MULTIPLE DISABILITIES. HEARING BALANCE AND COMMUNICATION 2013; 11. [PMID: 24273704 DOI: 10.3109/21695717.2013.812378] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE First, we review the development and plasticity of the central auditory pathways in infants and children with hearing loss who are fitted with cochlear implants (CIs). Second, we describe case studies demonstrating the clinical utility of the P1 central auditory evoked potential (CAEP) for evaluating cortical auditory maturation in the rapidly increasing number of cochlear-implanted children who have multiple disabilities. STUDY DESIGN Children who receive CIs provide a platform to examine the trajectories of deprivation-induced and experience-dependent plasticity in the central auditory system. We review the evidence for, and time limits of sensitive periods for cortical auditory maturation framing an optimal period for cochlear implantation. Finally, we evaluate the use of the P1 biomarker as an objective assessment tool in the special case of children with multiple disabilities. RESULTS The P1 response was useful in assessing central auditory maturation in patients with CHARGE association, ANSD, and Pallister-Killian Syndrome concomitant with hearing loss. CONCLUSION The presence of co-existing disabilities in addition to hearing loss poses unique challenges regarding both pre-intervention evaluation and post-intervention rehabilitation for children with multiple disabilities. When combined with a standard audiological test battery, the P1 CAEP biomarker has a useful role in objectively evaluating the maturation of central auditory pathways to determine the effectiveness of various intervention strategies in hearing-impaired children with multiple disabilities.
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Affiliation(s)
- Anu Sharma
- Dept. of Speech, Language and Hearing Sciences, University of Colorado at Boulder, 2501 Kittredge Loop Road 409 UCB Boulder, CO 80309
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Cardon G, Sharma A. Central auditory maturation and behavioral outcome in children with auditory neuropathy spectrum disorder who use cochlear implants. Int J Audiol 2013; 52:577-86. [PMID: 23819618 DOI: 10.3109/14992027.2013.799786] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE We examined cortical auditory development and behavioral outcomes in children with ANSD fitted with cochlear implants (CI). DESIGN Cortical maturation, measured by P1 cortical auditory evoked potential (CAEP) latency, was regressed against scores on the infant toddler meaningful auditory integration scale (IT-MAIS). Implantation age was also considered in relation to CAEP findings. STUDY SAMPLE Cross-sectional and longitudinal samples of 24 and 11 children, respectively, with ANSD fitted with CIs. RESULTS P1 CAEP responses were present in all children after implantation, though previous findings suggest that only 50-75% of ANSD children with hearing aids show CAEP responses. P1 CAEP latency was significantly correlated with participants' IT-MAIS scores. Furthermore, more children implanted before age two years showed normal P1 latencies, while those implanted later mainly showed delayed latencies. Longitudinal analysis revealed that most children showed normal or improved cortical maturation after implantation. CONCLUSION Cochlear implantation resulted in measureable cortical auditory development for all children with ANSD. Children fitted with CIs under age two years were more likely to show age-appropriate CAEP responses within six months after implantation, suggesting a possible sensitive period for cortical auditory development in ANSD. That CAEP responses were correlated with behavioral outcome highlights their clinical decision-making utility.
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Affiliation(s)
- Garrett Cardon
- Department of Speech, Language, and Hearing Sciences, University of Colorado, Boulder, USA
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Liang C, Hong Q, Jiang TT, Gao Y, Yao XF, Luo XX, Zhuo XH, Shinn JB, Jones RO, Zhao HB, Lu GJ. The effects and outcomes of electrolyte disturbances and asphyxia on newborns hearing. Int J Pediatr Otorhinolaryngol 2013; 77:1072-6. [PMID: 23648318 PMCID: PMC3738180 DOI: 10.1016/j.ijporl.2013.03.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 03/25/2013] [Accepted: 03/28/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To determine the effect of electrolyte disturbances (ED) and asphyxia on infant hearing and hearing outcomes. STUDY DESIGN We conducted newborn hearing screening with transient evoked otoacoustic emission (TEOAE) test on a large scale (>5000 infants). The effects of ED and asphyxia on infant hearing and hearing outcomes were evaluated. RESULT The pass rate of TEOAE test was significantly reduced in preterm infants with ED (83.1%, multiple logistic regression analysis: P<0.01) but not in full-term infants with ED (93.6%, P=0.41). However, there was no significant reduction in the pass rate in infants with asphyxia (P=0.85). We further found that hypocalcaemia significantly reduced the pass rate of TEOAE test (86.8%, P<0.01). In the follow-up recheck at 3 months of age, the pass rate remained low (44.4%, P<0.01). CONCLUSION ED is a high-risk factor for preterm infant hearing. Hypocalcaemia can produce more significant impairment with a low recovery rate.
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Affiliation(s)
- Chun Liang
- Maternal and Child Health Care Hospital of Baoan, Shenzhen, P.R. of China, 518133,Dept. of Otolaryngology, University of Kentucky Medical Center, Lexington, KY, USA 40536
| | - Qi Hong
- Maternal and Child Health Care Hospital of Baoan, Shenzhen, P.R. of China, 518133
| | - Tao-Tao Jiang
- Maternal and Child Health Care Hospital of Baoan, Shenzhen, P.R. of China, 518133
| | - Yan Gao
- Maternal and Child Health Care Hospital of Baoan, Shenzhen, P.R. of China, 518133
| | - Xiao-Fang Yao
- Maternal and Child Health Care Hospital of Baoan, Shenzhen, P.R. of China, 518133
| | - Xiao-Xing Luo
- Maternal and Child Health Care Hospital of Baoan, Shenzhen, P.R. of China, 518133
| | - Xiu-Hui Zhuo
- Maternal and Child Health Care Hospital of Baoan, Shenzhen, P.R. of China, 518133
| | - Jennifer B. Shinn
- Dept. of Otolaryngology, University of Kentucky Medical Center, Lexington, KY, USA 40536
| | - Raleigh O. Jones
- Dept. of Otolaryngology, University of Kentucky Medical Center, Lexington, KY, USA 40536
| | - Hong-Bo Zhao
- Dept. of Otolaryngology, University of Kentucky Medical Center, Lexington, KY, USA 40536
| | - Guang-Jin Lu
- Maternal and Child Health Care Hospital of Baoan, Shenzhen, P.R. of China, 518133
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Barone P, Lacassagne L, Kral A. Reorganization of the connectivity of cortical field DZ in congenitally deaf cat. PLoS One 2013; 8:e60093. [PMID: 23593166 PMCID: PMC3625188 DOI: 10.1371/journal.pone.0060093] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 02/25/2013] [Indexed: 02/07/2023] Open
Abstract
Psychophysics and brain imaging studies in deaf patients have revealed a functional crossmodal reorganization that affects the remaining sensory modalities. Similarly, the congenital deaf cat (CDC) shows supra-normal visual skills that are supported by specific auditory fields (DZ-dorsal zone and P-posterior auditory cortex) but not the primary auditory cortex (A1). To assess the functional reorganization observed in deafness we analyzed the connectivity pattern of the auditory cortex by means of injections of anatomical tracers in DZ and A1 in both congenital deaf and normally hearing cats. A quantitative analysis of the distribution of the projecting neurons revealed the presence of non-auditory inputs to both A1 and DZ of the CDC which were not observed in the hearing cats. Firstly, some visual (areas 19/20) and somatosensory (SIV) areas were projecting toward DZ of the CDC but not in the control. Secondly, A1 of the deaf cat received a weak projection from the visual lateral posterior nuclei (LP). Most of these abnormal projections to A1 and DZ represent only a small fraction of the normal inputs to these areas. In addition, most of the afferents to DZ and A1 appeared normal in terms of areal specificity and strength of projection, with preserved but smeared nucleotopic gradient of A1 in CDCs. In conclusion, while the abnormal projections revealed in the CDC can participate in the crossmodal compensatory mechanisms, the observation of a limited reorganization of the connectivity pattern of the CDC implies that functional reorganization in congenital deafness is further supported also by normal cortico-cortical connectivity.
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Affiliation(s)
- Pascal Barone
- Université Toulouse, CerCo, Université Paul Sabatier, Toulouse, France.
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