Abducens Nerve


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Related to Abducens Nerve: trochlear nerve

Abducens Nerve

 

either member of the sixth pair of cranial nerves. The abducens nerve originates in a motor nucleus in the pons on the floor of the rhomboid fossa. The outgrowths of the cells of this nucleus emerge from the brain at a point that lies between the pons and the pyramid of the medulla oblongata. Forming a single nerve trunk, the outgrowths exit from the cranial cavity through the superior orbital fissure and innervate the lateral rectus muscle of the eye, which turns the eyeball outward.

Lesions of the abducens nerve interfere with the mobility of the eyeball and can result in anomalies of the eyeball’s orientation. The latter condition is known as esotropia. Dizziness, double vision, and constrained head movements can also arise as a result of injury to the abducens nerve.

References in periodicals archive ?
All in all, binocular moving distance difference recovered before the maximal angle of diplopia in patients with diabetic abducens nerve palsy who received IEA therapy.
The patient was followed up after two week intervals and the degree of diplopia and abducens nerve palsy was noted.
Abducens nerve paralysis due to giant aneurysm in the medial carotid canal.
Palsies of the Oculomotor, Trochlear and Abducens Nerves
Cholesteatoma is the most common neoplasm located at the CPA,[sup][1] and it wraps up the abducens nerve and grows toward the ventral side of pons.
(5,14) Conversely, trauma to the base of the skull can lead to damage to the abducens nerve as it passes over the tip of the petrous temporal bone, causing abducens (VI) nerve palsy.
She was confused with gaze-evoked nystagmus and bilateral abducens nerve palsies, was areflexic with mildly reduced power and limb dysdiadochokinesia, and could not sit because of severe truncal ataxia.
Cranial nerve examination revealed a decreased ability to abduct the right eye consistent with abducens nerve palsy.
Movement of third eyelid across eye occurs in response to globe retraction caused by action of retractor bulbi, innervated by abducens nerve (Mitchell, 2012).
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).
Isolated bilateral abducens nerve palsy due to carotid cavernous dural arteriovenous fistula.