week 19

• How many extraocular muscles (EOMs) are there in each eye?

  Six EOMs (4 rectus: SR, IR, MR, LR; 2 oblique: SO, IO) and one eyelid muscle (levator palpebrae superioris).
• Where do the rectus and oblique muscles insert relative to the equator of the eye?


  Rectus muscles insert anterior to the equator; oblique muscles insert posterior to the equator.
• What are ductions in eye movement terminology?

  Monocular movements such as elevation, depression, abduction, and adduction