Superior Oblique Muscle

Superior Oblique Muscle The structure indicated is the superior oblique muscle. The superior oblique muscle is one of the extra-ocular muscles. The extra-ocular muscles include the medial, lateral, superior and inferior recti muscles, and the superior and inferior oblique muscles. Origin: Annulus of Zinn Insertion: Outer posterior quadrant of the eyeball Innervation: Trochlear nerve Action: Moves the eyeball down and out (depression, abduction, medial rotation). The superior oblique muscle inserts onto the eyeball via a long tendon which loops around a pulley (the trochlea of the superior oblique) on the medial aspect of the orbital roof, just lateral to the …

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