Development of Novel Objective Audiometry Based on Auditory Steady State Response and Sleep Stage Analysis

2014 Fiscal Year Final Research Report

• Project/Area Number: 24592540
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Otorhinolaryngology
• Research Institution: Yamagata University
• Principal Investigator: ITO Tsukasa 山形大学, 医学部, 助教 (50344809)
• Co-Investigator(Kenkyū-buntansha): KUBOTA Toshinori 山形大学, 医学部, 助教 (80536954)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 聴性定常反応(ASSR) / 睡眠深度 / 小児難聴 / 他覚的聴力検査

Outline of Final Research Achievements

Auditory steady-state response (ASSR) is a frequency-specific response. It is used to objectively evaluate the hearing level in sleeping young infants. To investigate the influence of sleep stage on ASSR, we measured the thresholds of ASSR and recorded electroencephalographic data to determine the sleep stage simultaneously. The thresholds of ASSR were especially lower in stage N3 (deep sleep) and REM (rapid eye movement sleep) Hence, sleep stage should be taken into account when estimating the hearing level from ASSR. Simultaneous measurements of ASSR and sleep stage are very difficult and complicated using commercially available equipment. Thus we are developing the new system to measure both of ASSR and sleep stage and to estimate the hearing level form ASSR thresholds with revision by sleep stage.

Free Research Field

耳鼻咽喉科