Bonnet M, MacKay W A
Department of Physiology, University of Toronto, Ont., Canada.
Brain Behav Evol. 1989;33(2-3):147-52. doi: 10.1159/000115918.
Scalp-recorded contingent-negative variation was analyzed in a reaction time paradigm with full, partial, or no prior information regarding two dimensions of a forearm response: direction (flexion/extension) and force level (weak/strong). Visual cues (light-emitting diodes) were used for the warning and response signals. The reaction time was shorter when direction, rather than force, was known in advance. Source derivation techniques revealed that the somatosensory arm area was more 'activated' by direction than force information, whereas the precentral cortex seemed to be more strongly influenced by force information. Partial advance information was sufficient to trigger preparatory activities specific for the revealed dimension of the ensuing movement.
在一个反应时范式中，分析了头皮记录的关联性负变化，该范式涉及关于前臂反应的两个维度（方向：屈曲/伸展；力水平：弱/强）的完整、部分或无先验信息。视觉线索（发光二极管）用于警告和反应信号。当预先知道方向而非力时，反应时更短。源推导技术显示，体感手臂区域受方向信息的“激活”比力信息更多，而中央前回似乎受 力信息的影响更强。部分预先信息足以触发针对后续运动所揭示维度的特定准备活动。
