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8 Cards in this Set
- Front
- Back
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Superior Rectus
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Origin: Common tendinous ring (attached to orbit around optic foramen)
Insertion: Superior and central part of the eyeball Action: Moves eyeball superiorly (elevation) and medially (adduction), and rotates it medially |
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Inferior Rectus
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Origin: Common tendinous ring (attached to orbit around optic foramen)
Insertion: Inferior and central part of the eyeball Action: Moves eyeball inferiorly (depression) and medially (adduction), and rotates it medially |
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Lateral Rectus
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Origin: Common tendinous ring (attached to orbit around optic foramen)
Insertion: Lateral side of eyeball Action: Moves eyeball laterally (abduction) |
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Medial rectus
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Origin: Common tendinous ring (attached to orbit around optic foramen)
Insertion: Medial side of eyeball Action: Moves eyeball medially (adduction) |
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Superior oblique
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Origin: Sphenoid bone, superior and medial to the tendinous ring in the orbit
Insertion: Eyeball between superior and lateral recti; the muscle inserts into the superior and lateral surfaces of the eyeball via a tendon that passes through the trochlea Action: Moves eyeball inferiorly (depression) and laterally (abduction), and rotates it medially |
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Inferior oblique
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Origin: Maxilla in floor of orbit
Insertion: Eyeball between inferior and lateral recti Action: Moves eyeball superiorly (elevation) and laterally (abduction) and rotates it laterally |
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Extrinsic Eye Muscles
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Fastest contracting and most precisely controlled skeletal muscles in the body
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Muscles that control movement of the eyeballs (3 pairs)
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1. Superior and inferior recti
2. Lateral and Medial recti 3. Superior and inferior obliques |
