Hariprakash Palaniswami , Aju Abraham , Krishna Yerraguntla
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引用次数: 0
Abstract
Objective
The effect of long term auditory deprivation on Cortical Auditory Evoked Potentials (CAEPs) especially in human models is not well explored. Hence, the current study was aimed to investigate the effects of long-term auditory deprivation and stimulability of auditory cortex in non habilitated congenitally deaf adolescents and adults using CAEPs.
Methods and Results
A total of 27 non-habilitated congenitally deaf adolescents/adults with age and gender matched normal hearing adolescents/adults participated in the study. The congenitally deaf group was fitted with high gain hearing aids (first fit). Further, the CAEPs were recorded. The obtained CAEP components were assessed for group effect, source and topographical differences. The between group analysis for CAEP responses showed a significant difference only for P2 latency and amplitude. The source analysis revealed that, in the normal hearing group for CAEPs, the sources were within the temporal regions. However, in the congenitally deaf group, along with the temporal cortex, the bilateral prefrontal cortex also was activated.
Conclusion
The findings revealed that it is possible to stimulate and evoke a matured CAEP response from a long deprived auditory system with adequate acoustic stimulation. The presence of CAEP responses is indicative of the functionality of the innate auditory pathway and the crossmodal plasticity in long auditory deprived individuals.
期刊介绍：
Journal of Otology is an open access, peer-reviewed journal that publishes research findings from disciplines related to both clinical and basic science aspects of auditory and vestibular system and diseases of the ear. This journal welcomes submissions describing original experimental research that may improve our understanding of the mechanisms underlying problems of basic or clinical significance and treatment of patients with disorders of the auditory and vestibular systems. In addition to original papers the journal also offers invited review articles on current topics written by leading experts in the field. The journal is of primary importance for all scientists and practitioners interested in audiology, otology and neurotology, auditory neurosciences and related disciplines. Journal of Otology welcomes contributions from scholars in all countries and regions across the world.
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