Vision for Prehension in the Medial Parietal Cortex

摘要: In the last 2 decades, medial posterior parietal area V6A has been extensively studied in awake macaque monkeys for visual and somatosensory properties its involvement encoding of spatial parameters reaching, including arm movement direction amplitude. This also contains populations neurons sensitive to grasping movements, such as wrist orientation grip formation. Recent work shown that encode shape graspable objects their affordance. other words, seems object specifically purpose action, a dynamic sequence visuomotor transformations evolve course reach-to-grasp action.We propose model cortical circuitry controlling actions, which acts comparator monitors differences between current desired hand positions configurations. error signal could be used continuously update motor output, correct reach direction, orientation, and/or aperture required during act prehension.In contrast generally accepted view dorsomedial component dorsal stream encodes but not grasping, functional strongly suggest this is involved all phases prehension, grasping.