<prompt> Primary action of superior oblique: March 2013 aAdductionIntorsionAbductionExtorsion  <response>: Ans. B i.e. Intorsion Extraocular muscles Intoors of the eye: Superior oblique Superior rectus Action of superior oblique: Abduction, Inoion Depression Nerve supply of superior oblique: Trochlear 4th cranial nerve Levator palpebrae superioris is supplied by: 3rd cranial nerve oculomotor Muscle attached to posterior tarsal margin: Mullers muscle 