- Principal sensory nucleus of trigeminal nerve
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Brain: Principal sensory 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 principalis nervi trigemini Gray's subject #187 787 NeuroNames hier-552 MeSH Trigeminal+nuclei The principal sensory nucleus (or chief sensory nucleus of V) is a group of second order neurons which have cell bodies in the dorsal Pons.
It receives information about discriminative sensation and light touch of the face as well as conscious proprioception of the jaw via first order neurons of CN V.
- Most of the sensory information crosses the midline and travels to the contralateral ventral posteriomedial (VPM) of the thalamus via the Ventral trigeminothalamic tract.
- However, information of the oral cavity travels to the ipsilateral Ventral Posteriomedial (VPM) of the thalamus via the Dorsal trigeminothalamic tract.
External links
Human brain, rhombencephalon, metencephalon: pons (TA A14.1.05.101–604, GA 9.785) Dorsal/
(tegmentum)SurfaceWhite: Sensory/ascendingTrapezoid body/VIII · Trigeminal lemniscus (Dorsal trigeminal tract, Ventral trigeminal tract) · Medial lemniscus · Lateral lemniscus
MLF, III, IV and VI: Vestibulo-oculomotor fibers
Anterior trigeminothalamic tract · Central tegmental tractWhite: Motor/descendingICP (Vestibulocerebellar tract)
MLF, III, IV and VI: Vestibulospinal tract (Medial vestibulospinal tract, Lateral vestibulospinal tract)Other greyVentral/
(base)White: Motor/descendingSurfaceBasilar sulcusOther grey: Raphe/
reticularNerves 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 branchestrigeminal
(PSN, TSN, MN, TMN->V)abducens (AN->VI) no significant branchesfacial (FMN, SN, SSN->VII) near origininside
facial canalvestibulocochlear
(VN, CN->VIII)glossopharyngeal
(NA, ISN, SN->IX)before jugular fossaafter jugular fossavagus
(NA, DNVN, SN->X)before jugular fossaafter jugular fossaaccessory (NA, SAN->XI) hypoglossal (HN->XII) Categories:
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