Superior oblique muscle

The superior oblique muscle is a muscle of the eye that rotates the eye downward when it is rotated inward. The superior oblique has a complex action that changes depending on the position of the eye.

Origin
The superior oblique muscle originates from the back of the eye socket, at sphenoid bone just above the annulus of Zinn.

Insertion
The superior oblique inserts on the top of the eye, at the posterior superior quadrant of the sclera on the posterior side of the equator of the eye.

Innervation
The superior oblique is innervated by the trochlear nerve (CN IV).