Cerebellar control of reaching movements
Cerebellar dysfunction causes a unique decomposition of reaching movements, termed dysmetria. This oscillation of the limb during active movement is especially noticeable in the over- and under-shooting of target endpoint, resulting in significant deficits in reach precision. Nevertheless, the cerebellar mechanisms that impart endpoint precision to reaching movements remain unidentified. Here, we examine the kinematic features of reaching movements that impact precision, and ask how cerebellar output contributes to these parameters during normal reaches and over the course of motor learning. ...
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