oculomotor nerve


Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.
Related to oculomotor nerve: abducens nerve

oculomotor nerve

[¦äk·yə·lō′mōd·ər ′nərv]
(neuroscience)
The third cranial nerve; a paired somatic motor nerve arising in the floor of the midbrain, which innervates all extrinsic eye muscles except the lateral rectus and superior oblique, and furnishes autonomic fibers to the ciliary and pupillary sphincter muscles within the eye.
References in periodicals archive ?
Pupil-sparing oculomotor nerve palsy was seen in the right eye, but the trochlear nerve (cranial nerve IV) and the abducens nerve (cranial nerve VI) were both intact (figure 1).
A diagnosis of oculomotor nerve palsy was considered and to investigate possible cavernous sinus pathology, the patient was transferred to another hospital with facility for magnetic resonance imaging (MRI) and neurological assessment.
Midbrain transmits pupillary response via oculomotor nerve (c).
Ophrhalmoplegic migraine: Reversible enhancement and thickening of the cisternal segment of the oculomotor nerve on contrastenhanced MR images.
14) Oculomotor nerve may also be damaged during the removal of anterior clinoid process.
It crosses the superior cerebellar artery close to the cerebral peduncles, passes the lateral edge of the clivus bone, and runs under the petroclinoidal ligament into the cavernous sinus between the double layer of dura and connective tissue at its lateral border, just below the oculomotor nerve and above the ophthalmic branch of the trigeminal (5th cranial) nerve.
As the pupillary light-reflex fibres lie outside the oculomotor nerve, pupil involvement secondary to diabetic neuropathy rarely occurs.
Pupillary dysfunction is related to injury to the sympathetic fibers in the cavernous portion of internal carotid artery or parasympathetic fibers that surround the oculomotor nerve.
Some patients may also have oculomotor nerve palsy and hemiplegia, Such AOP infarcts account for 0.
19) Although no gadolinium enhancement of the cisternal segment of the oculomotor nerve (third or sixth) was detected by magnetic resonance imaging, the patient was diagnosed with ophthalmoplegic migraines, based on her medical history and a clinical picture fitting the international criteria for ophthalmoplegic migraines.
Motor nerve schwannomas arising from the oculomotor nerve are very rare.