Trochlear nucleus

Encyclopedia : T : TR : TRO : Trochlear nucleus

Transverse section of mid-brain at level of inferior colliculi. (Trochlear nucleus is not on diagram, but would be near oculomotor nucleus.) |- style="text-align: center;" class="hiddenStructure" | colspan="2" |
|- style="text-align: center; line-height: 1;" class="hiddenStructure" | colspan="2" |The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (Trochlear is "IV") |- class="hiddenStructure" |Latin |colspan="2"| |- class="hiddenStructure" | |colspan="2"|[subject #188 ] |- class="hiddenStructure" |Part of |colspan="2"| |- class="hiddenStructure" |Components |colspan="2"| |- class="hiddenStructure" |Artery |colspan="2"| |- class="hiddenStructure" |Vein |colspan="2"| |- class="hiddenStructure" |Acronym(s) |colspan="2"| |- class="hiddenStructure" |NeuroNames |colspan="2"|[hier-504] |- class="hiddenStructure" |MeSH |colspan="2"|[] |- class="hiddenStructure" |Dorlands/Elsevier |colspan="2"|[/] |}
The nucleus of the trochlear nerve is located in the midbrain, at the level of the inferior colliculus. It is a motor nucleus, so located near the midline.
Oddly, fibers from the trochlear nucleus cross over in the midbrain and exit posteriorly, (this is the only cranial nerve to do so). The nerve then goes around the midbrain, and is visible coming out the sides.

See also
trochlear nerve
External links
[Diagram at University of Michigan]

Brain: Trochlear nucleus

Mesencephalon (midbrain)

cerebral peduncle: midbrain tegmentum (periaqueductal gray, ventral tegmentum, nucleus raphe dorsalis), pretectum, substantia nigra, red nucleus, pedunculopontine nucleus, medial longitudinal fasciculus, medial lemniscus, rubrospinal tract, lateral lemniscus
tectum: corpora quadrigemina, inferior colliculi, superior colliculi
cerebral aqueduct: oculomotor nucleus, trochlear nucleus, Edinger-Westphal nucleus

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