Superior rectus muscle
Superior Rectus Muscle
The Superior Rectus Muscle (pronunciation: soo-PEER-ee-or REK-tus MUSS-ul) is one of the Extraocular muscles that control the movements of the Eye. It is responsible for elevation, Intorsion and Adduction of the eye.
Etymology
The term 'Superior Rectus' is derived from Latin, where 'superior' means 'above' and 'rectus' means 'straight'. This is in reference to the muscle's position and direction in the body.
Anatomy
The Superior Rectus Muscle originates from the Annulus of Zinn, a tendinous ring in the orbit, and inserts into the superior part of the Eyeball. It is innervated by the Oculomotor nerve (Cranial Nerve III).
Function
The primary function of the Superior Rectus Muscle is to move the eye upward (elevation). It also contributes to turning the top of the eye toward the nose (intorsion) and moving the eye toward the midline of the body (adduction).
Related Terms
- Inferior rectus muscle
- Medial rectus muscle
- Lateral rectus muscle
- Superior oblique muscle
- Inferior oblique muscle
See Also
External links
- Medical encyclopedia article on Superior rectus muscle
- Wikipedia's article - Superior rectus muscle
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