Mesencephalic nucleus of trigeminal nerve

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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.^[1] 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.

[edit] See also

Trigeminocerebellar fibers

[edit] References

^ Baker R, Llinás R (1971). "Electrotonic coupling between neurones in the rat mesencephalic nucleus". J. Physiol. (Lond.) 212 (1): 45-63. PMID 5545184.

[edit] External links

Washington University

v • d • e

Brain: mesencephalon (midbrain)

Tectum (Dorsal)

Corpora quadrigemina: Inferior colliculi (Brachium of inferior colliculus), Superior colliculi (Brachium of superior colliculus)
Subcommissural organ • Pretectum

Peduncle (Ventral)

Peduncle tegmentum	Periaqueductal gray (Cerebral aqueduct, Dorsal raphe nucleus) Ventral tegmentum • Pedunculopontine nucleus • Red nucleus (Rubrospinal tract, Rubro-olivary tract) • MLF (riMLF) • lemnisci (Medial, Lateral) cranial nuclei: GSA (V: Mesencephalic) - GSE (III: Oculomotor, IV: Trochlear) - GVE (III: Edinger-Westphal) Interstitial cell of Cajal Superior cerebellar peduncles (Decussation of superior cerebellar peduncle)

Peduncle base	Substantia nigra (Pars compacta, Pars reticulata) Cerebral crus: Corticospinal tract - Corticobulbar tract - Corticopontine tract/Frontopontine fibers/Temporopontine fibers Interpeduncular fossa

v • d • e

Nerves of head and neck: the cranial nerves and nuclei

olfactory (AON->I)

olfactory bulb - olfactory tract

optic (LGN->II)

optic chiasm - optic tract

oculomotor (ON,EWN->III)

superior branch (parasympathetic root of ciliary ganglion/ciliary ganglion) - inferior branch

trochlear (TN->IV)

no significant branches

trigeminal (PSN,TSN,MN,TMN->V)

trigeminal ganglion • ophthalmic • maxillary • mandibular

abducens (AN->VI)

no significant branches

facial (FMN,SN,SSN->VII)

near origin	nervus intermedius • geniculate

inside facial canal	greater petrosal (pterygopalatine ganglion) - nerve to the stapedius - chorda tympani (lingual nerve, submandibular ganglion)

at stylomastoid foramen	posterior auricular - suprahyoid (digastric, stylohyoid) - parotid plexus (temporal, zygomatic, buccal, mandibular, cervical)

vestibulocochlear (VN,CN->VIII)

cochlear (striae medullares, lateral lemniscus) • vestibular (Scarpa's ganglion)

glossopharyngeal (NA,ISN,SN->IX)

before jugular fossa	ganglia (superior, inferior)

after jugular fossa	tympanic (tympanic plexus, lesser petrosal, otic ganglion) • stylopharyngeal branch • pharyngeal branches • tonsillar branches • lingual branches • carotid sinus

vagus (NA,DNVN,SN->X)

before jugular fossa	ganglia (superior, inferior)

after jugular fossa	meningeal branch - auricular branch

neck	pharyngeal branch (pharyngeal plexus) - superior laryngeal (external, internal) - recurrent laryngeal (inferior) - superior cervical cardiac

thorax	inferior cardiac - pulmonary - vagal trunks (anterior, posterior)

abdomen	celiac - renal - hepatic - anterior gastric - posterior gastric