Negative cortical DC shifts preceding and accompanying simple and complex sequential movements.

摘要: Negative cortical DC shifts preceding and accompanying the execution of four different motor tasks were analysed in 18 subjects (Ss): Repetitive flexions extensions forefinger had to be performed either by right (1) or left (2) hand. This simple task was compared a complex one which hand alternated fixed sequence. The (3) (4) Thus, conditions differed side performing (right/left) task-complexity (simple/complex). After its voluntary initiation, each for at least period six seconds. A Bereitschaftspotential (BP) preceded initiation movement. Task-performance accompanied negative shift called performance-related negativity (N-P). Amplitudes BP N-P analysis variance (ANOVA) using factors “performing hand” “task-complexity” “Performing significant effects on N-BP C3* C4* (positioned over primary cortex) but did not influence mid-central (Cz*), frontal (F3, Fz, F4) parietal (P3, Pz, P4) recordings. “Task-complexity” (Cz*, C1*, C2*) Pz) recordings with higher movements. Recordings vary “task complexity”. Dissociative indicate that movement-related DC-potential C3*/ can functionally separated from those recorded Cz*. Variations depending specific properties found larger during performance than preparation task.