Superior oblique muscle

Muscles · Latin: Musculus obliquus superior bulbi oculi

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The superior oblique muscle, or obliquus oculi superior, is a fusiform muscle originating in the upper, medial side of the orbit (i.e. from beside the nose) which abducts, depresses and internally rotates the eye.

It is the only extraocular muscle innervated by the trochlear nerve (the fourth cranial nerve).

Definition from Wikipedia, CC BY-SA 4.0.