| Term | Definition |
|---|
| recti origin | annulus tendineus |
| recti insertion | sclera posterior to cornea |
| levator palpebrae superioris origin | lesser wing of sphenoid |
| levator palpebrae superioris insertion | tarsal cartilage and superficial fascia of eyelid |
| levator palpebrae superioris | contains smooth muscle fibers (superior tarsal or Muller's muscle) |
| Superior oblique origin | lesser wing of sphenoid |
| superior oblique | pass through trochlea |
| superior oblique insertion | sclera deep to superior rectus |
| inferior oblique origin | medial orbital wall |
| inferior oblique | passes posterolaterally beneath eyeball |
| inferior oblique insertion | sclera deep to lateral rectus |
| Superior oblique innervation | CN 4 |
| Lateral rectus innervation | CN 6 |
| superior tarsal (muller's) muscle innervation | postganglionic sympathetics from superior cervical ganglion |
| muscle action | act in isolation |
| muscle function | contribution to a perticular motion |
| horizontal axis | elevation and depression |
| vertical axis | abduction and adduction |
| anteroposterior axis (optic axis) | intorsion and extorsion |
| Bielschowsky's sign | paralayzed superior oblique is unable to produce necessary intorsion |
| Frontal, maxillary, and zygomatic bones | outer orbital rim |
| lacrimal and ethmoid bones | medial wall |
| sphenoid bone | lateral wall |
| palatine bone | contribution to posteromedial wall |
| Cyclovertial muscles | produce significant torsion as well as elevation or depression |
| superior and inferior rectus and obliques | cyclovertical muscles |
| medial rectus | a pure adductor |
| lateral rectus | pure abductor |
| superior rectus and inferior oblique | elevation |
| inferior rectus and superior oblique | depression |
Combine with other sets
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