Calculation of goal directed movements demonstrates a functional segregation of the cerebellar hemispheres

Introduction: The performance of a reaching movement involves the selection of the hand as an effector and the calculation of a movement trajectory in space. These calculations are performed in different parts of a fronto-parietal network. To investigate the role of the cerebellum in the preparation and execution of such a motor task, we examined the cerebro-cerebellar network while goal directed hand movements depending on different information levels given in the preparation phase with fMRI. Methods: 16 volunteers (3-T, Siemens Trio) prepared and executed a reaching hand movement (while central fixation) with…