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NTIS 바로가기생물정신의학 = Korean journal of biological psychiatry, v.20 no.4, 2013년, pp.119 - 128
김창규 (인제대학교 임상감정인지기능연구소) , 김현택 (고려대학교 심리학과) , 이승환 (인제대학교 임상감정인지기능연구소)
Objectives Memory impairment is a very important mental health issue for elderly and adults. Mild cognitive impairment (MCI) is a prodromal stage of Alzheimer's disease (AD). Early detection of the prodromal stage of patients with AD is an important topic of interest for both mental health clinician...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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전반적인 기억과정, 작업기억, 일화성 기억 및 의미 기억 등을 처리할 때 나타나는 뇌 진동을 규명하고자 한 연구에는 어떤 것들이 있는가? | 전반적인 기억과정, 작업기억, 일화성 기억 및 의미 기억 등을 처리할 때 나타나는 뇌 진동을 규명하려는 많은 연구들이 있다. 기존연구는 기억과 관련되어 알파와 세타 밴드 진동을 보고하였고,19) 삽화 기억을 인출할 때 특히 세타 주파수의 활성화가 강하게 나타난다는 것을 발견하였다.20)24) 또한 기억과제를 수행하는 도중에 세타와 알파 주파수 밴드의 전위값이 변함을 보고 하였는데,25) Weiss와 Rappelsberger26)는 기억 처리와 장거리(long-range) 뇌파 동기화 간의 상관관계에 대해보고하였고, 그 외 주파수 영역별 coherence에 대한 분석도 존재한다.27) | |
경도인지장애는 무엇인가? | 경도인지장애(minimal cognitive impairment, 이하 MCI)는 어느 정도 인지기능장애가 있으나 치매로 진단하기에는 충분치 않은 상태를 의미하는 진단명이다. 경도인지장애는 1990년대 중반 이후 널리 알려졌으며5) 인지기능의 연속선상에서볼 때, 정상 노화 과정으로 나타나는 기억력 손상을 넘어, 장차 치매로 진단될 만한 기억력의 감퇴를 보이는 단계를 지칭한다. | |
기억성 경도인지장애가 알츠하이머병 치매로 진전될 확률이 상대적으로 높다고 알려진 이유는 무엇인가? | Pertersen 등7) 의 분류에 따르면, 경도인지 장애에는 크게 기억력의 장애를 보이는 기억성 경도인지장애 환자(amnestic MCI)와 기억력의 장애를 보이지 않지만 다른 인지 기능에는 장애를 보이는 비 기억성 경도인지장애(non-amnestic MCI)로 나눌 수 있다. 한편, 알츠하이머병 치매 초기에 나타나는 주요 임상 증상은 내측 측두엽 영역(medial temporal area)과 해마(hippocampus) 및 주변부의 손상에 따른 일화성 기억(episodic memory)의 감퇴이며, 따라서 기억성 경도인지장애 환자가 알츠하이머병 치매로 진전될 확률이 상대적으로 높은 것으로 알려져 왔다.8)9) 또한 비 기억성 경도인지 장애 환자의 경우 알츠하이머병 치매가 아닌 다른 원인으로 유발된 치매의 이전 단계일 가능성도 있다는 연구 결과들도 존재한다. |
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