Effect of hearing loss on cognitive and language functions in patients with Alzheimer's Disease Fumitaka Ohmori 1 , Kiyoko Iiboshi 1 , Noriko Kuraoka 2 , Shinobu Kayanoki 2 , Misaki Yoshimori 2 1Department of Speech-Language-Hearing Therapy, School of Health Science, Kyushu University of Health and Welfare 2Department of Rehabilitation, Medical Corporation Igakura Group, Pearlland Hospital Keyword: アルツハイマー型認知症 , 聴力低下 , 認知機能 , 言語機能 , ワーキングメモリー , Alzheimer's Disease , hearing loss , cognitive function , language function , working memory pp.72-79
Published Date 2012/7/15
DOI https://doi.org/10.11477/mf.6001100323
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 We conducted a pure-tone air conduction hearing test and administered the MMSE and the Language Function Test to 52 patients with Alzhaimer's Disease(AD). Pure Tone Average(PTA) did not correlate with either the total score of MMSE(r=-.13) or Language Function Test(r=.28). We therefore suggest that hearing loss has no general effect on overall cognitive and language functions of AD patients. Next, we divided the patients into the Hearing Impaired(PTA≧41dBHL) and Hearing Unimpaired(PTA≦40dBHL) groups and performed a non-paired t-test to clarify the difference between the two groups. Significant differences were found for delayed recall(0.9±1.0, 2.0±0.6), kanji writing(1.0±0.8, 0.2±0.4) and kana writing(2.6±1.0, 1.5±1.6). We think that hearing loss has an adverse effect on working memory but a positive effect on maintaining writing ability. The prevalence of hearing loss among the subjects was 96.1%, but no subject wore a hearing aid. We think it is important to investigate conditions that enable AD patients to wear hearing aids.

Copyright © 2012, Japanese Association of Speech-Language-Hearing Therapists. All rights reserved.


電子版ISSN 印刷版ISSN 1349-5828 日本言語聴覚士協会