Dorsalis oblique muscle (Dom)
The dorsalis oblique muscle is a thin, wing-shaped muscle formed of oblique fibers that run dorsal to the medialis rectus muscle and ventral to the dorsalis rectus muscle. It originates from the parabasisphenoid bone with fleshy fibers, then fans out obliquely to form two aponeurotic branches that insert on the scleral cartilage and the superior extension of the upper eyelid. The origin of the dorsalis oblique muscle is located posterodorsally to the origin of the ventralis oblique muscle. The insertion site of the dorsalis oblique muscle is ventral to the insertion site of the dorsalis rectus muscle\RL.
Origin: Fleshy, from the parabasisphenoid bone\RL.
Insertion: Aponeurotic, on the scleral cartilage and superior extension of the upper eyelid\RL.
Function: Elevation of the eyeball, elevation of the upper eyelid, and intorsion.