abducens nerve(redirected from Sixth nerve)
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ab·du·cent nerve [CN VI][TA]
a small motor nerve supplying the lateral rectus muscle of the eye; its origin is in the facial colliculus of the tegmentum of the pons just below the surface of the rhomboid fossa. It emerges from the brain in the fissure between the medulla oblongata and the posterior border of the pons (medullopontine sulcus); it enters the dura of the clivus and passes through the cavernous sinus, entering the orbit through the superior orbital fissure.
Etymology: L, abducere, to take away
either of the paired sixth cranial nerves. It arises in the pons near the fourth ventricle, leaves the brainstem between the medulla oblongata and pons, and passes through the cavernous sinus and the superior orbital fissure. It controls the lateral rectus muscle, turning the eye outward. Also called abducent, nervus abducens,sixth cranial nerve.
abducens nervethe cranial nerve of vertebrates that supplies the external rectus muscle of the eye (see EYE MUSCLE); it is mainly MOTOR in function.
[L.] drawing away.
see abducent nerve, and Table 14.