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.

trochlear nerve

Either of the fourth pair of cranial nerves that originates in the midbrain and innervates a muscle of the eyeball.

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

Mentioned in

References in periodicals archive

Symptomatic excyclotorsion following inferior transposition of both medial rectus muscles in patients with bilateral trochlear nerve palsy.

Clinical Features and Surgical Results in Harada-Ito Surgery Patients

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).

Cranial nerves supplying the extraocular muscles

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.

Morphological Investigation of the Brain of the African Ostrich (Struthio camelus)/Investigacion Morfologica del Cerebro de la Avestruz Africana (Struthio camelus)

OATs are good for eyes###OculomotorAbducent and Trochlear nerves supply eye muscles

EFFECTIVE WAYS TO LEARN AND RETAIN GROSS ANATOMY

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.

Surgical Management of Horn Fracture in Small Ruminants

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.

Anomalous posterior clinoid process and its clinical importance