trochlear nerve

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Related to CN IV: CN VI

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 ?
* Bilateral lesions are often thought to be unilateral until squint surgery is performed, following which the contralateral CN IV palsy is often revealed.
* routine neuroimaging for isolated CN IV palsy is not required.
* runs forward below CN III, CN IV and first division of CN V