Grasping requires translating object geometries into appropriate hand shapes. How the brain computes these transformations is currently unclear. We investigated three key areas of the macaque cortical grasping circuit with microelectrode arrays and found cooperative but anatomically separated visual and motor processes. The parietal area AIP operated primarily in a visual mode. Its neuronal population revealed a specialization for shape processing, even for abstract geometries, and processed object features ultimately important for grasping. Premotor area F5 acted as a hub that shared the visual coding of AIP only temporarily and switched to highly dominant motor signals towards movement planning and execution. We visualize these non-discrete premotor signals that drive the primary motor cortex M1 to reflect the movement of the grasping hand. Our results reveal visual and motor features encoded in the grasping circuit and their communication to achieve transformation for grasping. ; peerReviewed
Object vision to hand action in macaque parietal, premotor, and motor cortices.
2016-01-01
27458796
Article (Journal)
Electronic Resource
English
DDC: | 629 |
Vision for action: thalamic and cortical inputs to the macaque superior parietal lobule
BASE | 2021
|BASE | 2002
|British Library Online Contents | 1995
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