Fig. 1From: Biochemical and structural magnetic resonance imaging in chronic stroke and the relationship with upper extremity motor functionPrecentral gyrus, which represents the M1 of hand area (landmark of precentral gyrus), determined anatomically by the area that faces and forms the “middle knee” of the central sulcus, located just at the cross point between the precentral sulcus and the central sulcus, which is topographically located at the level of the distal end of the superior frontal sulcus and is therefore also visible on the cortical surfaceBack to article page