Mesencephalic nucleus of trigeminal nerve

Mesencephalic nucleus of trigeminal nerve
Brain: Mesencephalic nucleus of trigeminal nerve
Gray696.png
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
NeuroLex ID birnlex_1010

The mesencephalic nucleus is involved with proprioception of the face, 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.[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

References

  1. ^ Baker R, Llinás R (1971). "Electrotonic coupling between neurones in the rat mesencephalic nucleus". J. Physiol. (Lond.) 212 (1): 45–63. PMC 1395705. PMID 5545184. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1395705. 

External links

v · d · eHuman brain: mesencephalon (midbrain) (TA A14.1.06, GA 9.800)
Tectum
(Dorsal)
Surface
White: Sensory/ascending
White: Motor/descending
Peduncle
(Ventral)
White: Sensory/ascending
lemnisci (Medial, Lateral) · Ascending MLF (Vestibulo-oculomotor fibers) · Spinothalamic tract · Anterior trigeminothalamic tract · Dentatothalamic tract
White: Motor/descending
Grey: other
Base
White: Motor/descending
Surface

M: CNS

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)
v · d · eNerves of head and neck: the cranial nerves and nuclei (TA A14.2.01, GA 9.855)
olfactory (AON->I)
optic (LGN->II)
oculomotor
(ON, EWN->III)
trochlear (TN->IV)
no significant branches
trigeminal
(PSN, TSN, MN, TMN->V)
abducens (AN->VI)
no significant branches
facial (FMN, SN, SSN->VII)
near origin
vestibulocochlear
(VN, CN->VIII)
glossopharyngeal
(NA, ISN, SN->IX)
ganglia (superior, inferior)
vagus
(NA, DNVN, SN->X)
ganglia (superior, inferior)
accessory (NA, SAN->XI)
hypoglossal (HN->XII)

M: PNS

anat(h/r/t/c/b/l/s/a)/phys(r)/devp/prot/nttr/nttm/ntrp

noco/auto/cong/tumr, sysi/epon, injr

proc, drug(N1B)

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