Anatomy
The corticobulbar tract originates in motor cortex of the frontal lobe, just superior to the lateral fissure and rostral to the central sulcus. The tract descends through the genu of the internal capsule and a few fibers in the posterior limb of the internal capsule, as it passes from the cortex down to the midbrain. In the midbrain, the internal capsule becomes the cerebral peduncles. The white matter is located in the ventral portion of the cerebral peduncles, called the crus cerebri. The middle third of the crus cerebri contains the corticobulbar and corticospinal fibers. The corticobulbar fibers exit at the appropriate level of the brainstem to synapse on the lower motor neurons of the cranial nerves.
Read more about this topic: Corticobulbar Tract
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