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Trochlear nucleus

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Title: Trochlear nucleus  
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Subject: Abducens nerve, Optic chiasm, Vestibulo-oculomotor fibers, Parvocellular red nucleus, Gaze (physiology)
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Trochlear nucleus

Trochlear nucleus
Outline of the nucleus raphes dorsalis:
DRif interfascicular subnucleus,
DRv ventral subnucleus
DRvl ventrolateral subnucleus
DRd dorsal subnucleus
mlf medial longitudinal fasciculus
Aq cerebral aqueduct
IVn trochlear nucleus.
The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (Trochlear is "IV")
Details
Latin nucleus nervi trochlearis
Identifiers
Gray's p.807
MeSH 12582022
NeuroNames hier-504
NeuroLex ID Trochlear nucleus
Anatomical terms of neuroanatomy

The nucleus of the trochlear nerve is located in the midbrain, at the level of the inferior colliculus. It is a motor nucleus, so is located near the midline.

Oddly, fibers from the trochlear nucleus cross over in the midbrain at the superior medullary velum and exit posteriorly, (this is the only cranial nerve to do so). The nerve then goes around the midbrain, and is visible coming out of the sides.

See also

Additional images

External links

  • Atlas image: n2a4p4 at the University of Michigan Health System - "Brainstem, Cranial Nerve Nuclei, Sagittal Section, Medial View"
  • nucleus+of+trochlear+nerve at eMedicine Dictionary
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