NUR 460 - Central Nerves 4, 5, 6
NUR 460 - Central Nerves 4, 5, 6 460
Popular in Nursing Concepts IV: Health of Maturing Adults / Chronic Disease
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This 1 page Class Notes was uploaded by ndp33 on Thursday July 28, 2016. The Class Notes belongs to 460 at Niagara University taught by in Summer 2016. Since its upload, it has received 15 views. For similar materials see Nursing Concepts IV: Health of Maturing Adults / Chronic Disease in Nursing and Health Sciences at Niagara University.
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Date Created: 07/28/16
Cranial Nerves 3, 4, and 6 Cranial nerve 3: Constriction; thickening of lens; tested for with accommodation (moving finger towards eyes) Tested with CN 4 and CN6 Damage could result in lateral, outward gaze of eye Innervates extraocular muscles, inferior oblique muscle of eye, levator palpebrae superioris muscle Cranial nerve 4: Innervates only superior oblique muscle of eye (located behind eyeball) o Superior oblique muscle moves: inward rotation towards midline (especially when adducted); o Superior oblique muscle depresses, especially when adducted 6 extraocular muscles innervated by CN 3, 4, and 6: CN3: o Superior rectus, (elevation) o Medial rectus, (adduction) o Inferior rectus (depression) o Inferior oblique,(abduction, elevation) o Levator palpebrae superioris (retracts and elevates eyelid) CN4: o Superior oblique (depression and inward rotation of eye) CN6: o Lateral rectus (abduction of eye) Note: accommodation is reflex action of eye, in response to a near object, then looking at a distant object, compromising coordinated changes in lens size and shape Light reflex: reflex that controls the diameter of pupil in response to light