Extrensic Eye Muscles
Terms
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- superior rectus origin
- common tendinous ring (attached to orbit around optic foramen)
- superior rectus insertion
- superior and central part of eyeball
- superior rectus action
- moves eyeball superiorly (elevation) and medially (adduction), and rotates it medially
- inferior rectus origin
- common tendinous ring (attached to orbit around optic foramen)
- inferior rectus insertion
- inferior and central part of eyeball
- inferior rectus action
- moves eyeball inferiorly (depression) and medially (adduction), and rotates it laterally
- laterial rectus origin
- common tendinous ring (attached to orbit around optic foramen)
- laterial rectus insertion
- lateral side of eyeball
- laterial rectus action
- moves eyeball laterally (abduction)
- medial rectus origin
- common tendinous ring (attached to orbit around optic foramen)
- medial rectus insertion
- medial side of eyeball
- medial rectus action
- moves eyeball medially (adduction)
- superior oblique origin
- sphenoid bone, superior and medial to the tendinous ring in the orbit
- superior oblique insertion
- eyeball between superior and lateral recti. The muscle inserts into the superior and laterial surfaces of the eyeball via tendon that passes through trochlea
- superior oblique action
- moves eyeball inferiorly (depression) and laterally (abduction) and rotates it medially
- inferior oblique origin
- maxilla in floor of orbit
- inferior oblique insertion
- eyeball between inferior and lateral recti
- inferior oblique action
- moves eyeball superiorly (elevation) and laterally (abduction) and rotates it laterally
-
innervation
superior rectus, inferior rectus, medial rectus, and inferior oblique -
oculomotor nerve
(cranial nerve III) -
innervation
lateral rectus -
abducens nerve
(cranial nerve VI) -
innervation
superior oblique -
trochlear nerve
(cranial nerve IV)