Terminology Service for NFDI4Health

trochlear nerve

Go to external page http://purl.obolibrary.org/obo/UBERON_0001644

Term info

Label

trochlear nerve

Synonyms
  • cranial nerve IV
  • fourth cranial nerve
  • nervus trochlearis [IV]
  • superior oblique nerve
  • trochlear IV nerve
  • trochlear nerve [IV]
  • trochlear nerve tree
database cross reference
Subsets

uberon_slim, pheno_slim, vertebrate_core

abbreviation
4n [ NIFSTD : NeuroNames_abbrevSource BIRNLEX : 1654 ]

latin term
nervus trochlearis [IV] [ FMA : TA FMA : 50865 ]

depicted by

http://purl.obolibrary.org/obo/Trochlear_nerve.png

development notes

The human trochlear nerve is derived from the basal plate of the embryonic midbrain.

external definition

Somatic efferent nerve which supplies a single eye muscle, the m. obliquus superior.[AAO]

has related synonym

pathetic nerve, trochlear, trochlear nerve or its root, CN-IV, nervus trochlearis, trochlear nerve/root, nerve IV

homology notes

We conclude this section by listing some of the many synapomorphies of craniates, including (...) (5) cranial nerves (...) (reference 1); Phylogenetically, the cranial nerves are thought to have evolved from dorsal and ventral nerves of a few anterior spinal nerves that became incorporated into the braincase. Dorsal and ventral nerves fuse in the trunk but not in the head, and they produce two series: dorsal cranial nerves (V, VII, IX, and X) and ventral cranial nerves (III, IV, VI, and XIII) (reference 2).[well established][VHOG]

id

UBERON:0001644

taxon notes

Homologous trochlear nerves are found in all jawed vertebrates