Oblique muscles :-
Superior oblique muscle :-
muscle details :-
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).
Sphenoid bone at the orbital apex, medial to optic canal .
Outer posterior quadrant of the eyeball .
Trochlear nerve .
Primary action is intorsion (medial rotation); secondary actions are to abduct and depress the eyeball (i.e. it makes the eye move outward and downward)