Cranial nerve nucleus

A cranial nerve nucleus is a collection of neurons (gray matter) in the brain stem that is associated with one or more cranial nerves. Axons carrying information to and from the cranial nerves form a synapse first at these nuclei. Lesions occurring at these nuclei can lead to effects resembling those seen by the severing of nerve(s) they are associated with. All the nuclei except that of the trochlear nerve (CN IV) supply nerves of the same side of the body.

Cranial nerve nucleus
The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (The olfactory and optic centers are not represented.)
Latinnucleus nervi cranialis
NeuroLex IDnlx_28532
Anatomical terms of neuroanatomy


Motor and sensory

In general, motor nuclei are closer to the front (ventral), and sensory nuclei and neurons are closer to the back (dorsal). This arrangement mirrors the arrangement of tracts in the spinal cord.


This list documents nuclei by the part of the brain they are found in:

Nuclei present in the Midbrain
Nuclei present in the Pons
Nuclei present in the medulla
Micrograph of the posterior portion of the open part of the medulla oblongata, showing the fourth ventricle (top of image) and the hypoglossal nucleus (medial - left of image) and the dorsal motor nucleus of the vagus nerve (lateral - right of image). H&E-LFB stain.


Nuclei of the cranial nerves
Olfactory nerveOlfactory bulb
Optic nerveLateral geniculate nucleus
Oculomotor nerveOculomotor nucleus
Edinger-Westphal nucleus
Trochlear nerveTrochlear nucleus
Trigeminal nerveTrigeminal nerve nuclei:
Mesencephalic nucleus
Principal sensory nucleus
Spinal trigeminal nucleus
Trigeminal motor nucleus
Abducens nerveAbducens nucleus
Facial nerveFacial motor nucleus
Superior salivatory nucleus
Solitary nucleus
Vestibulocochlear nerveVestibular nuclei
w. subnuclei
Cochlear nucleus
w. subnuclei
Glossopharyngeal nerveSolitary nucleus
Spinal nucleus of the trigeminal nerve
Lateral nucleus of vagal trigone.
Nucleus ambiguus
Inferior salivatory nucleus
Vagus nerveDorsal nucleus of vagus nerve
Nucleus ambiguus
Solitary nucleus
Spinal trigeminal nucleus
Accessory nerveSpinal accessory nucleus
Nucleus ambiguus
Hypoglossal nerveHypoglossal nucleus


  • Lennart Heimer, The Human Brain, ISBN 0-387-94227-0

Additional images

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.