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Mesencephalic nucleus of trigeminal nerve

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Title: Mesencephalic nucleus of trigeminal nerve  
Author: World Heritage Encyclopedia
Language: English
Subject: Trigeminal nerve, Trochlear nucleus, Edinger–Westphal nucleus, Proprioception, Parvocellular red nucleus
Publisher: World Heritage Encyclopedia

Mesencephalic nucleus of trigeminal nerve

Mesencephalic nucleus of trigeminal nerve
The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (Trigeminal nerve nuclei are at "V".)
Latin nucleus mesencephalicus nervi trigemini
Gray's p.787
MeSH A08.
NeuroNames hier-550
NeuroLex ID Mesencephalic nucleus of trigeminal nerve
Anatomical terms of neuroanatomy

The mesencephalic nucleus is involved with proprioception of the face, that is, the feeling of position of the muscles. Unlike many nuclei within the central nervous system (CNS), the mesencephalic nucleus contains no chemical synapses but are electrically coupled.[1] Instead, neurons of this nucleus are pseudounipolar cells receiving proprioceptive information from the mandible, and sending projections to the motor trigeminal nucleus to mediate monosynaptic jaw jerk reflexes. It is also the only structure in the CNS to contain the cell bodies of a primary afferent, which are usually contained within ganglia (like the trigeminal ganglion).

See also


  1. ^ Baker R, Llinás R (1971). "Electrotonic coupling between neurones in the rat mesencephalic nucleus". J. Physiol. (Lond.) 212 (1): 45–63.  

External links

  • Washington University
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