Age-dependent amplitude variation of brain-stem auditory evoked potentials |
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| Affiliation: | 1. Department of Otolaryngology, Audiology and Phoniatrics, Pediatric Cochlear Implant Center, Children''s Hospital of Bydgoszcz, Poland;2. Cochlear Middle East FZ LLC, Dubai, United Arab Emirates;3. Department of Otolaryngology - Head and Neck Surgery, University of Missouri School of Medicine, USA;4. Department of Otorhinolaryngology, The Second Medical Faculty, Charles University in Prague, Motol University Hospital, Czech Republic;1. Auditory Science Laboratory, The Hospital for Sick Children, Program in Neuroscience and Mental Health, and Department of Otolaryngology – HNS, 555 University Ave., Toronto M5G 1X8, Canada;2. Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, Rosebrugh Building, 164 College St., Toronto M5S 3G9, Canada;3. Division of Otolaryngology – Head and Neck Surgery, Department of Surgery and Pediatrics, University of Utah, 50 N Medical Drive, Salt Lake City, UT 84132, USA;4. Department of Otolaryngology – Head and Neck Surgery, University of Toronto, 190 Elizabeth St., R. Fraser Elliott Building, Toronto M5G 2N2, Canada;1. Department of Otorhinolaryngology, Adnan Menderes University, Faculty of Medicine, Aydın, Turkey;2. Department of Pediatric Neurology, Adnan Menderes University, Faculty of Medicine, Aydın, Turkey;3. Department of Biostatistic, Adnan Menderes University, Faculty of Medicine, Aydın, Turkey;1. Department of Otolaryngology, Head and Neck Surgery, Kobe City Medical Center General Hospital, Kobe, Japan;2. Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan;3. Department of Otolaryngology, Institute of Biomedical Research and Innovation, Kobe, Japan;1. Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan;2. Department of Otolaryngology, Kobe City Medical Center General Hospital, Kobe, Japan |
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| Abstract: | Normative amplitude values of brain-stem auditory evoked potential (BAEP) components are given for normally hearing subjects at 1, 10, 30, 50 and 70 years of age, with an intragroup age variation of only ±6 months. Under these circumstances amplitude standard deviations decreased to less than 20% of the mean values. In contrast with the reduced evolution of latency with age, BAEP amplitude (for components I–V) undergoes a greater oscillation during ontogeny. With the exception of component I, it increased markedly from 1 year to 10 years of age and decreased thereafter constantly up to 50 years, with a mean rate of 10 nV yearly. The decrease slowed down between 50 and 70 years. The amplitude differences between the subgroups are highly significant statistically (P < 0.01). Possible reasons for these changes are discussed. |
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