Cyclic, condition-independent activity in primary motor cortex predicts corrective movement behavior

BioRxiv : the Preprint Server for Biology
Adam G Rouse

Abstract

Cyclic neural activity occurred not only during initial reaching movements but also subsequent corrective movements as subjects performed a precision center-out task. The cyclic trajectories identified from the condition-independent neural activity were similar between initial and corrective movements. For both, instantaneous cycle phase predicted when contact with the target occurred, even when the subject made multiple corrective movements. Moreover, the phase of the cyclic neural activity correlated with instantaneous movement speed. Neural activity during these corrective movements thus reveals encoding of discrete sub-movements rather than smooth and continuous updating of movement towards a target.

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