Differential Functional Predominance of the Frontal and Parietal Areas during Performance of Isolated or Combined Eye and Hand Reaching Movements

Introduction: Reaching movements are combined of different subcomponents consisting of information regarding the position in space or the effector of the movement itself. Separate cortical areas seem to exert a differential influence. Whereas premotor and prefrontal areas are hypothesized to code for the motor effector, the parietal areas code for position in space. We compared the fMRI activations during combined eye-hand reaching movement with respect to the quality of information given before the execution of the task. Methods: We investigated 14 volunteers at 3 T (EPI-Sequences, whole brain). Each task consi…