Fig. 3.

Tractography maps of a healthy control overlaid in colour onto the axial MNI T1w template at the levels of the CR, CM, PLICs, PLICi, AC and PC. The colours encode the following different fascicles: red = foot, blue = hand, green = lips and pink = tongue. At the level of the CR (a), the foot fascicle is located in the posterior region of the right hemisphere, with the hand and lip fascicles located anterolateral to it. In the left hemisphere, only the hand and lip fascicles were reconstructed and overlap. At the CM level, the hand fascicles are located anterolateral to the foot fascicles in the right hemisphere. The tongue fascicles are located anterolateral to the foot, hand and lip fascicles. The hand and lip fascicles overlap in the left hemisphere. The somatotopic organization of these fascicles continues to be preserved with the same arrangement along the longitudinal axis of the PLIC at the levels of the PLICs (c) and PLICi (d). At the level of the AC (e), the foot fascicles are located in the posterior region, followed anteriorly by the hand, lip and tongue fascicles in the right hemisphere, whereas the lip and hand fascicles overlap in the left hemisphere.