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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
Gray696.svg
The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (The olfactory and optic centers are not represented.)
Details
Identifiers
Latinnucleus nervi cranialis
NeuroLex IDnlx_28532
TAA14.1.00.004
FMA54501
Anatomical terms of neuroanatomy

StructureEdit

Motor and sensoryEdit

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.

LocationEdit

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.

LocationEdit

ReferencesEdit

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

Additional imagesEdit

External linksEdit