인지활동이 정상여성노인의 뇌파에 미치는 영향 분석

Analysis for The Effects of Working Cognition Task on EEG Power and Coherence in Normal Elderly Women

이 연구의 목적은 인지활동이 정상여성노인의 뇌파에 미치는 영향을 분석하는 것으로 20명의 정상여성노인을 대상으로 하였다. 뇌파측정은 21개 전극을 사용해 전두엽, 중심엽, 두정엽, 측두엽과 후두엽에서 측정하였다, 분석에 사용한 뇌파는 θ1(4~5㎐), θ2(6~7㎐), α1(8~9.9㎐), α2(10~11.9㎐), α3(12~13㎐), β1(14~25.9㎐)과 β2(26~40㎐) 파이었다. 연구 결과 θ1 파는 인지활동을 하는 동안 Fz, F3, F7, F8, Cz, C3, C4, T3, T4, T6, Pz, O1, O2 영역에서, θ2 파는 Fz, F3, F7, F8, T3, O1, O2 영역에서 유의한 증가가 있었다. α1 파는 Fz, F4, Cz, C3, C4, T3, T4, T5, T6, Pz, P3, P4, O1 영역에서, α2 파는 Fz, F4, Cz, C3, C4, T4, T5, T6, Pz, P3, P4, O1, O2 영역에서 유의한 감소가 있었다. 반면 β2 파는 F3, F4, F7, F8, T4, O1, O2 영역에서 유의한 증가가 있었다. 결과적으로 θ1 파와 θ2 파는 인지활동 중에 증가하고, α1 파와 α2 파는 감소하며, β2 파는 증가하여 일반 정상인에게서 볼 수 있는 뇌파의 변화 양상과 일치하였다.

The purpose of this study was to find out that working cognition task can be make alternation on normal EEG power and coherence in normal elderly women. 20 normal elderly women were participated in this study. All subjects performed working cognition task with Raven’s CPM while electroencephalograph(EEG) signal was recorded. EEGs were measured continuously at rest and during working cognition task. EEG power and coherence was computed over 21 channels; righe and left frontal, central, parietal, temporal and occipital region. A kind of electroencephalogram was θ1(4~5㎐), θ2(6~7㎐), α1(8~9.9㎐), α2(10~11.9㎐), α3(12~13㎐), β1(14~25.9㎐), and β2(26~40㎐). θ1 wave was increased significantly at Fz, F3, F7, F8, Cz, C3, C4, T3, T4, T6, Pz, O1 and O2. and θ2 wave was increased significantly at Fz, F3, F7, F8, T3, O1 and O2 during cognitive working task. α1 wave was decreased significantly at Fz, F4, Cz, C3, C4, T3, T4, T5, T6, Pz, P3, P4 and O1, and α2 wave was decreased significantly at Fz, F4, Cz, C3, C4, T4, T5, T6, Pz, P3, P4, O1 and O2 during cognitive working task. α3 wave was increased significantly at F3, F4, F7 and F8, but decreased significantly at Cz, C4, Pz, P3 and P4 during cognitive working task. β1 wave was increased significantly at F3, F4, F7, F8 and T4, but decreased significantly at Cz, Pz, P3 and P4 during cognitive working task. β2 wave was increased significantly at F3, F4, F7, F8, T4, O1, O2 during cognitive working task. In conclusion, These results suggest that θ1, θ2 and β2 waves were increased, but α1 and α2 waves were decreased during cognitive working task.