trochlear nerve


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trochlear

 [trok´le-ar]
1. pertaining to a trochlea.
2. pertaining to the fourth cranial nerve (trochlear nerve).
trochlear nerve the fourth cranial nerve; it supplies muscle sense and the impulse for movement to the superior oblique muscle of the eyeball. See anatomic Table of Nerves in the Appendices.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

trochlear nerve

n.
Either of the fourth pair of cranial nerves that originates in the midbrain and innervates a muscle of the eyeball.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

trochlear nerve

The 4th of the 12 pairs of cranial nerves. The trochlear nerve supplies one of the muscles that moves the eye-the superior oblique muscle. Contraction of this muscle turns the eye downwards and outwards.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

trochlear nerve

the fourth cranial nerve on vertebrates, which innervates the superior oblique muscles of the eye.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Symptomatic excyclotorsion following inferior transposition of both medial rectus muscles in patients with bilateral trochlear nerve palsy.
In classical trochlear nerve palsy, the affected eye adopts a hypertropic and out-rotated position in primary gaze leading to complaint of vertical and torsional diplopia, especially when attempting to look down and in (eg when reading or walking down stairs).
Dorsolateral view to the brain with meninges: A= cerebrum, B= optic lobe, C= cerebellum, D= medulla oblongata, E= spinal cord, 1= nuchal flexure, 2= abducent nerve., 3= tentorum cerebelli, 4= falex cerebri, 5= dura matter, 6= arachnoid, 7= dorsal cerebral longitudinal fissure, 8= dorsal transverse fissure, 9= olfactory nerve, 10= optic nerve, 11= trochlear nerve, 12= oculomotor, 13= trigeminal nerve.
OATs are good for eyes###OculomotorAbducent and Trochlear nerves supply eye muscles
All animals were prepared for aseptic surgery and given local analgesia by giving nerve block to cornual branch of lachrymal nerve in sheep and cornual branches of lacrimal and infra trochlear nerves in caprines with 2 ml of 2% Lignocaine hydrochloride at each site subcutaneously.
The anomaly of the PCP may also pose an additional obstacle while performing clinoidectomy operations and there are chances of inadvertent injury to the internal carotid artery, the oculomotor and the trochlear nerves.