Extraocular Eye Muscles
Keep an Eye out for questions on this! Special thanks to our REV MED Ambassador @odstudentdiary Optic Nerve can be seen here traveling from the retina, taking the impulses straight to the brain. The Annulus of Zinn, also known as Common Tendinous ring. This is simply a fibrous tissue surrounding the optic nerve and the four rectus muscles. Mnemonic you must know! Cranial Nerves: SO4 LR6 REST3 SO4 = SO (superior oblique muscle)+ 4th CN LR6 = LR (lateral rectus muscle) + 6th CN And that is all you need to know because the REST are all done by the 3rd CN! Review your Cranial Nerves with our awesome new video! Head over to our YouTube Channel & support us by subscribing! (LINK IN BIO) Check us out on Instagram @rev.med Directional Index of Muscles ⤵️ *Medial rectus moves the eye inward, toward the nose (adduction) *Lateral rectus moves the eye outward, away from the nose (abduction) *Superior rectus moves the eye upward (elevation), rotates the top of the eye toward the nose (intorsion), moves the eye inward (adduction) *Inferior rectus moves the eye downward (depression), rotates the top of the eye away from the nose (extorsion), moves the eye inward (adduction) *Superior oblique rotates the top of the eye toward the nose (intorsion), moves the eye downward (depression), moves the eye outward (abduction) *Inferior oblique rotates the top of the eye away from the nose (extorsion), moves the eye upward (elevation), moves the eye outward (abduction)
