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Review
Dementia and Neurocognitive Disorders 2014: 13: 3: 51-62

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정상 노년층과 경도인지장애의 언어 이해력 특성
이수정*·이승진*,†·송지연*, 김향희*,‡
연세대학교 대학원 언어병리학협동과정*, 대림대학교 언어재활과†, 연세대학교 의과대학 재활의학교실 및 재활의학연구소‡
Characteristics of Language Comprehension in Normal Elderly and the Mild Cognitive Impaired
Soo Jung Lee, M.S.*, Seung Jin Lee, M.S.*,†, Ji Yeon Song, M.S.*, HyangHee Kim, Ph.D.*,‡
Graduate Program in Speech and Language Pathology*, Yonsei University, Seoul; Department of Speech and Language Habilitation†, Daelim University College, Anyang; Department and Research Institute of Rehabilitation Medicine‡, Yonsei University College of Medicine, Seoul, Korea
Background: Healthy aging is characterized by declines in language function and it is important to differentiate language comprehension difficulties due to pathological aging (i.e., mild cognitive impairment) from those due to normal aging. The purposes of this study were to review the literature on characteristics of language comprehension in normal elderly and the mild cognitive impaired, and to compare their performances on different language domains. Methods: A comprehensive literature search identified numerous studies on language comprehension in both groups, and we analyzed them according to each language domain. Results: The results indicated that the normal elderly show more difficulties in the comprehension of grammatically or lexically complex sentences and in text/discourse comprehension than words or simple sentences. Compared to normal elderly, MCI shows significantly lower performance on text/discourse comprehension and other tasks demanding higher cognitive function. In both groups, there are many different factors affecting language comprehension, such as hearing sensitivity, speech rate, literacy, and cognition. Conclusions: The results may provide insight into useful language comprehension tasks for differential diagnosis between normal aging and MCI. Further research on various compensatory strategies in daily life to facilitate language comprehension for both groups is warranted.
Key Words: Normal elderly, Mild cognitive impairment, Language comprehension
대한치매학회지 (Dementia and Neurocognitive Disorders)