trochlear nerve


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trochlear nerve

[′träk·lē·ər ‚nərv]
(neuroscience)
The fourth cranial nerve; either of a pair of somatic motor nerves which innervate the superior oblique muscle of the eyeball.
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The long intracranial course of the trochlear nerve makes it especially prone to injury in closed head traumas.
ACVF, anterior cerebral vein foramen; AFPC, anterior foramen for preorbital canal; ANTO, antorbital condyle; ELF, endolymphatic foramen; ES, eye stalk; ESAF, efferent spiracular artery foramen; F, fontanelle; FM, foramen magnum; ICAF, internal carotid artery; LC, lateral commissure; NC, nasal capsule; OC, occipital condyle; OF, orbital fissure; PFPC, posterior foramen for preorbital canal; PLF, perilymphatic foramen; PROP, preorbital process; POST, postorbital process; R, rostrum; SOC, supraorbital crest; II, optic nerve foramen; IV, trochlear nerve foramen; VII, hyomandibular branch of facial nerve foramen; X, vagus nerve foramen.
Tumescent anesthesia was also used at the recipient area after the supra-orbital/supra- trochlear nerve block.
Frontal nerve on Levator palpebrae superioris, Trochlear nerve at medial and lacrimal nerve at lateral aspect of orbit were identified.
30%), perhaps with a preponderance of isolated trochlear nerve involvement due to a higher congenital incidence, (7) with multiple palsies accounting for the remaining approximately 10% of cases.