The<unk>  loops through a pulley-like structure (the trochlea of superior<unk>  and inserts into the sclera on the posterotemporal surface of the eyeball. It is the pulley system that gives superior<unk>  its actions, causing depression of the eyeball despite being inserted on the superior surface. Superior<unk>  nerve The superior<unk>  arises immediately above the margin of the optic foramen, superior and medial to the origin of the superior rectus, and, passing forward, ends in a rounded tendon, which plays in a fibrocartilaginous ring or pulley attached to the trochlear fossa of the frontal bone. The contiguous surfaces of the tendon and ring are lined by a delicate mucous sheath, and enclosed in a thin fibrous investment. The tendon is reflected caudally, laterally, and inferiorly beneath the superior rectus to the lateral part of the bulb of the eye, and is inserted onto the scleral surface, behind the equator of the eyeball, the insertion of the muscle lying between the superior rectus and lateral rectus.
Superior oblique muscle
Inferior oblique muscle
Morcellator
Latissimus dorsi muscle
Subscapularis muscle
Levator ani
Levator palpebrae superioris muscle
Iris sphincter muscle