Human posterior parietal cortex mediates hand-specific planning

摘要: Abstract The processes underlying action planning are fundamental to adaptive behavior and can be influenced by recent motor experience. Here, we used a novel fMRI Repetition Suppression (RS) design test the hypotheses that unfolds more efficiently for successive actions made with same hand. More efficient processing was predicted correspond both faster response times (RTs) initiate reduced activity levels — RS. Consistent these predictions, detected RTs hand accompanying fMRI-RS within bilateral posterior parietal cortex right-lateralized operculum. Within cortex, RS effects were localized intraparietal superior cortices. These areas strongly activated involving contralateral findings provide compelling new evidence specification of plans in hand-specific terms, indicate sensitive history. computational efficiency accounts history effects, interpreted as comparatively when involve versus opposite