Trochlea of superior oblique

Trochlea of superior oblique
Rectus muscles:
2 = superior, 3 = inferior, 4 = medial, 5 = lateral
Oblique muscles: 6 = superior, 8 = inferior
Other muscle: 9 = levator palpebrae superioris
Other structures: 1 = Annulus of Zinn, 7 = Trochlea, 10 = Superior tarsus, 11 = Sclera, 12 = Optic nerve
Nerves of the orbit. Seen from above. (Trochlea visible at upper left but not labeled.)
Details
Identifiers
Latintrochlea musculi obliqui superioris bulbi
TA98A15.2.07.017
TA22049
FMA49065
Anatomical terminology

The trochlea of superior oblique is a pulley-like structure in the eye. The tendon of the superior oblique muscle passes through it. Situated on the superior nasal aspect of the frontal bone, it is the only cartilage found in the normal orbit. The word trochlea comes from the Greek word for pulley.