Functional dominance of finger flexion over extension, expressed in left parietal activation

摘要: Sensory stimuli may elicit a widely distributed parietal-premotor circuitry underlying task-related movements such as grasping. These include the visual presentation of an object to be grasped, well observation grasping performed by others. In this study, we used functional Magnetic Resonance Imaging (fMRI) test whether performance simple finger flexion, contrasted extension, might similarly activate higher-order associated with Statistical Parametric Mapping (SPM) showed that compared was related significant activation left posterior parietal cortex and insula, bilaterally. This pattern supported our hypothesis flexion has specific relation involved in preparing manual tasks. Although two motor conditions major overlap primary cortex, increased flexion-related at precentral motor-premotor junction further its association control.