ABSTRACT

It has been well known that persons with Alzheimer's Disease (AD) display semantic-conceptual impairment from an early stage of dementia. However, the linguistic domain, more specifically morphological features of language production of AD patients have not be explored in great detail, especially in Korean language. Two experiments (Study 1: picture description task, Study 2: constrained production task) compare the speech output of individuals with AD (CDR 0.5, 1, 2, respectively) to that of healthy age- and education-matched controls. The principal finding was that as the disease progresses, the patients displayed an earlier loss of morphemes acquired later in terms of stages of language development as opposed to a long-term maintenance of the morphemes acquired earlier. This finding leads to a conclusion that information stored later in the brain may be more susceptible to brain damage.

KEYWORD

Alzheimer's Dementia, language production, morpheme, stages of language development

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