Modulation of cortical activity as a result of task-specific practice.

摘要: This report aims to examine the role of task-specific practice in modification finger force enslaving and provide empirical evidence for specific EEG frequency bands accompanying such may be an end-effectors dependent phenomenon. Nine handed naive subjects without any training music participated a pre- post-practice sessions separated by 12 sessions. Subjects performed series isometric production tasks at 10% 50% maximum voluntary contraction (MVC) with two rates development separately index ring fingers. Task-specific aimed suppressing contribution neighboring fingers was achieved via visual feedback traces. Behavioral data (accuracy amount enslaving) domain obtained Morlet Wavelet transforms were analyzed. The major behavioral finding is that significantly enhanced accuracy individuated control "most enslaved" (P<0.01), but not finger. novel findings are: (a) modulation activity within alpha band (8-12 Hz) central area brain as function similar both (b) after practice, gamma (30-50 specific. Both patterns suggest effect on reduction practice-related plasticity human cortex phenomena.