Figure 6.10: Somatotopic Organization of Corticobulbar and Corticospinal Tracts

Figure 6.10 A: An illustration shows the forebrain's horizontal section with the internal capsule, which indicates the corticospinal tract. An enlarged view of the internal capsule shows the Putamen, Globus pallidus, head of caudate, and thalamus. The internal capsule consists of the anterior limb, Genu, and posterior limb. The motor fibers for the leg, the trunk, the arm, and the face are located in the internal capsule’s posterior limb. Figure 6.10 B: An illustration shows the horizontal section of the midbrain with the red nucleus and cerebral peduncle. The cerebral peduncle consists of substantia nigra and basis pedunculi. The motor fibers for the leg, the trunk, the arm, and the face are located in the middle one-third of the basis pedunculi. Figure 6.10 C: An illustration shows the spinal cord's horizontal section with the motor fiber of the trunk located in the medial to those that control the leg, trunk, and arm.


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