Eye and orbit Musculature

Eye and orbit Musculature - Eye and orbit Musculature...

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Eye and orbit Musculature Musculature of the Orbit There are six Orbital Muscles; four of the muscles control the movement of the eye going up and down and side to side. Two of the muscles control the movements of the eye when the head moves. The four muscles that control elevation, depression, adduction and abduction are called the rectus muscles (superior, inferior, medial and lateral). The other two muscles which control intorsion and extorsion are called the oblique muscles (superior and inferior). The superior oblique originates at the orbital apex, passes over a pulley termed the trochlea process before inserting onto the outer posterior surface of the eyeball. A way of remembering which nerves innervate each of the muscles is by using the simple equation LR 6 SO 4 R 3 which means 1. Lateral rectus is innervated by CN VI 2. Superior oblique is innervated by CN IV 3. The Rest are all innervated by CN III The Muscles of the upper Eyelid The upper eyelid has a muscle within the orbit called the Levator Palpebrae Superioris. This muscle is
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This note was uploaded on 12/04/2011 for the course ANT ANT2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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Eye and orbit Musculature - Eye and orbit Musculature...

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