The TCATT contains 3-dimensional commissural connections of 6 different frontal cortical areas (A), including the primary motor cortex, dorsal premotor cortex, ventral premotor cortex, supplementary motor area, presupplementary motor area, and somatosensory cortex. (B) The 2-dimensional representation of these tracts in the sagittal view (x=0, 10, 20, 25, 30), coronal view (y=−30, −20, −10, 0, 10), and axial view (z=25, z=35, z=40, z=50, z=60).