Functional Magnetic Resonance Imaging Adaptation Reveals the Cortical Networks for Processing Grasp-Relevant Object Properties

摘要: Grasping behaviors require the selection of grasp-relevant object dimensions, independent overall size. Previous neuroimaging studies found that intraparietal cortex processes size, but it is unknown whether graspable dimension (i.e., grasp axis between selected points on object) or size objects triggers activation in region. We used functional magnetic resonance imaging adaptation to investigate human brain areas involved processing real 3-dimensional grasping and viewing tasks. Trials consisted 2 sequential stimuli which object's dimension, its global both were novel repeated. calcarine extrastriate visual adapted regardless during In contrast, superior parietal occipital (SPOC) lateral complex left hemisphere task. Finally, dorsal premotor grasping, not viewing, tasks, suggesting motor was complete at this stage. Taken together, our results provide a cortical circuit for progressive transformation general properties into grasp-related responses.