Corticobulbar tract

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Brain: Corticobulbar tract
Components and location of the corticobulbar tract.
[[Image:|250px|center|]]
Latin	tractus corticonuclearis
Gray's	subject #
Part of
Components
Artery
Vein
BrainInfo/UW	ancil-371
MeSH	[1]

The corticobulbar (or corticonuclear) tract is a white matter pathway connecting the cerebral cortex to the brainstem (the term "bulbar" referring to the brainstem).

The 'bulb' is an archaic term for the medulla oblongata. In clinical usage, it includes the pons as well.

The muscles of the face, head and neck are controlled by the corticobulbar system, which terminates on motor neurons within brainstem motor nuclei. This is in contrast to the corticospinal tract, which connects the cerebral cortex to spinal motor neurons, and controls movement of the torso, upper and lower limbs.

The corticobulbar tract innervates cranial motor nuclei bilaterally with the exception of the lower facial nucleus which is innervated contralaterally. Among those nuclei that are bilaterally innervated a slightly stronger connection contralaterally than ipisilaterally is observed.

[edit] External links

• Brainstem at UWisc 07CNXII
• http://thebrain.mcgill.ca/flash/i/i_06/i_06_cl/i_06_cl_mou/i_06_cl_mou.html

Mesencephalon (midbrain)

cerebral peduncle: midbrain tegmentum (periaqueductal gray, ventral tegmentum, nucleus raphe dorsalis), pretectum, substantia nigra, red nucleus, pedunculopontine nucleus, medial longitudinal fasciculus, medial lemniscus, rubrospinal tract, lateral lemniscus tectum: corpora quadrigemina, inferior colliculi, superior colliculi cerebral aqueduct: oculomotor nucleus, trochlear nucleus, Edinger-Westphal nucleus

This page uses content from the English-language version of Wikipedia. The original article was at Corticobulbar tract. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.