Evaluation criteria of mild cognitive impairment by neurophysiological examination.

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We tried to make evaluation criteria of mild cognitive impairment, by using both EEG frequency analysis and psychological examination. We found that a decrease in cognitive function might be related to a decrease in the ability to generate various cortical rhythm patterns elicited by sensory stimulation and voluntary movements. Thus, it may be predictable whether mild cognitive impairment patients develop dementia, by investigating patterns of EEG frequency bands elicited sensory stimulation and voluntary movements during comfortable or uncomfortable environments.