Mesencephalic nucleus of trigeminal nerve

Brain: 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	subject #187 787
NeuroNames	hier-550
MeSH	Trigeminal+nuclei
Dorlands/Elsevier	n_11/12581865

The mesencephalic nucleus is involved with proprioception, that is, the feeling of position of the muscles. Unlike many nuclei within the CNS, the mesencephalic nucleus contains no chemical synapses but are electrically coupled (Baker and Llinas1971). Instead, neurons of this nucleus are pseudounipolar cells receiving proprioceptive information from the jaw, and sending projections to the motor trigeminal nucleus to mediate monosynaptic jaw reflexes.

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Baker, R.G. and Llinas, R. Electrotonic coupling between neurones in the rat mesencephalic nucleus. J. Physiology 212: 45-63, 1971.

v • d • e Brain: mesencephalon (midbrain)
Tectum	Corpora quadrigemina (Inferior colliculi, Superior colliculi) • Subcommissural organ • Pretectum
Peduncle tegmentum	Periaqueductal gray (Cerebral aqueduct, Dorsal raphe nucleus) • Ventral tegmentum • Pedunculopontine nucleus • Red nucleus • MLF (riMLF) • lemnisci (Medial, Lateral) • cranial nuclei (III: Oculomotor nucleus, III: Edinger-Westphal nucleus, IV: Trochlear nucleus, V: Mesencephalic)
Peduncle base	Substantia nigra • Cerebral crus (Corticospinal tract, Corticobulbar tract, Corticopontine tract/Frontopontine fibers/Temporopontine fibers)