Gutiérrez S, Corsi-Cabrera M
Departamento de Psicofisologia, Universidad Nacional Autónoma de México, D.F.
Int J Neurosci. 1988 Sep;42(1-2):149-55. doi: 10.3109/00207458808985769.
EEG activity of 8 male volunteers was monopolarly recorded at P3 and P4 during four resting periods and during the performance of three series of cognitive tasks: one verbal, one spatial and one demanding verbal and spatial processing or "mixed" task. Beta, alpha and theta relative power were compared between successful and unsuccessful trials, between start and end of performance interval and among resting periods and tasks. There were no significant differences between successful and unsuccessful trials, nor between start and ending of performance period. The effect of tasks and hemispheres on relative power showed different results for each band: beta was responsive to hemispheres while alpha and theta were sensitive to tasks; beta relative power was significantly higher in the left parietal and the same pattern of asymmetry was maintained during the three series of tasks; alpha relative power decreased and theta increased significantly during the three series of tasks regardless of their cognitive nature as compared to baseline.
在四个静息期以及执行三组认知任务期间，对8名男性志愿者的脑电图（EEG）活动进行了单极记录，这三组认知任务分别为：一组语言任务、一组空间任务以及一组需要语言和空间处理的“混合”任务。比较了成功和不成功试验之间、表现间隔的开始和结束之间以及静息期和任务之间的β、α和θ相对功率。成功和不成功试验之间以及表现期的开始和结束之间均无显著差异。任务和半球对相对功率的影响在每个波段显示出不同的结果：β对半球有反应，而α和θ对任务敏感；左顶叶的β相对功率显著更高，并且在三组任务期间保持相同的不对称模式；与基线相比，无论认知性质如何，在三组任务期间α相对功率均显著降低，θ相对功率显著增加。
