Contingent negative variation in the aged with memory impairment and dementia tendency in the course of advance towards dementia / 中华老年医学杂志

ABSTRACT

Objective To investigate the feature and general trend of the contingent negative variation (CNV) in the aged with memory impairment (AMI) and dementia tendency in the course towards advanced dementia. Methods CNV in 69 AMI subjects (serving as the study group) and 22 healthy elderly subjects selected from well age matched (serving as the control group) were examined. Hasegawa's dementia scale for the aged (HDS) in all AMI were also examined. 2 3 years later, 22 from the study group were examined again. The wave forms and relevant indexes of CNV were observed and analyzed. Results Reaction time(RT)〔(284.3?170.6) ms vs (149.8?101.7) ms, P