:: Volume 20, Issue 1 (27 2011) ::
aud 2011, 20(1): 1-8 Back to browse issues page
Electrophysiologic and behavioral assessment of hearing status in children with spastic diplegia
Nima Rezazade1, Mehdi Akbari 1, Mohsen Ahadi1, Hossein Karimi2, Faranak AliAbadi3, Mohammad Kamali4
1- Department of Audiology, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
2- Paediatrics Neuro-Rehabilitation Research Center, University of Welfare and Rehabilitation Sciences, Tehran, Iran
3- Department of Occupationaltherapy, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
4- Department of Rehabilitaion Management, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
Abstract:   (9245 Views)

Background and Aim: High incidence of speech disorders in children with cerebral palsy could be related to a deficiency in processing of auditory stimuli. So it is vital to check out any peripheral or central disorders in auditory system using behavioral and electrophysiological auditory tests.
Methods: In a cross-sectional study, 15 children with spastic diplegia, mean age 5.77, SD 2.26 years, and 15 normal children, mean age 5.33, SD 1.80 years, were tested using pure tone audiometry, immittance and auditory brainstem responses. The results were compared between the two groups.
Results: Hearing thresholds and middle ear status were in normal range in all participants however, contralateral acoustic reflex thresholds were mostly elevated. Comparing absolute latency and interpeak latency intervals of auditory brainstem responses between the two groups, absolute latency interval of later waves, and in specific the V wave, was significantly longer in diplegic children (p=0.04) resulting in a longer III-V interpeak latency intervals (p=0.02).
Conclusion: Neurological disorders in ponto-reticulo-spinal pathway, pontine reticular nuclei and upper pons which are adjacent to auditory nuclei of lateral leminiscus and inferior colliculus result in auditory dys-synchrony and increased latency intervals in latter waves of auditory brainstem responses. This could also attributed to functional disorders in wave-generating sites in these patients.

Keywords: Auditory brainstem responses, spastic diplegia, hearing status
Full-Text [PDF 206 kb]   (2690 Downloads)    
Type of Study: Research |
Received: 2010/06/26 | Accepted: 2010/12/1 | Published: 2013/10/12

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Volume 20, Issue 1 (27 2011) Back to browse issues page