Extraocular Muscles | Eye Anatomy

Extraocular muscles - second video in eye anatomy series. Check out the 3D app at AnatomyLearning.com. More videos available on AnatomyZone.com.
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In this video the following structures are discussed:
- superior rectus
- inferior rectus
- medial rectus
- lateral rectus
- superior oblique
- inferior oblique
- movements of the eye: intorsion, extorsion, elevation, depression, abduction, adduction
This video is a collaboration between AnatomyZone and TeachMeAnatomy. For more information/material on this topic check out the article at:
teachmeanatomy.info/head/organ...
Website: www.anatomyzone.com
Facebook: / anatomyzone
Twitter: / anatomyzone
3D model: biodigitalhuman.com
3D model: zygotebody.com
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[@nlomi202]

SO4 LR6 is the mnemonic here...SO for superior oblique which is supplied by the 4th CN and LR for lateral rectus which is supplied by the 6th CN...and the remaining muscles are supplied by the 3rd CN

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[@chrispaul79]

I’m so proud of myself for actually understanding what you just said

[@sloth8852]

LR6 SO4 (based on H2SO4)

[@kavya_godachi]

All3 LR6 SO4

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[@shahzaibzahid2447]

superior rectus=elevates, adducts, and medially rotates the eyeball
inferior rectus=depresses, adducts, and laterally rotates the eyeball
medial rectus=adducts
lateral rectus=abducts
superior oblique=depresses, abducts, and medially rotates
inferior oblique=elevates, abducts, and laterally rotates.

[@jesseroel8362]

And he also mentions the Lateral Palpebrae Superioris which is for elevating the upper eyelid.

[@anatomyinsight]

nice, remember th-cam.com/video/OYt2Zv6DKi4/w-d-xo.html
Importantly - the action of the muscles will often depend on the direction of gaze (see also link to my video) - as the orbits are at an angle, only when you align the direction of gaze with the vector of pull of the respective muscles will you get a "clean" single motion. Your list is correct for the eyeball in the primary position :-) I love this guys videos

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[@HarryPotter-vl3pc]

And it is good to remember dat , obliques cause elevation or depression in adducted position, recti cause elevation or depression in abducted position, though the primary action of oblique is abduction and of recti is abduction

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[@drvonyt8897]

Great explanation ! I've always had trouble imagining the extraocular muscles, not anymore !!

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Thank you so much!

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only after this video I actually got how the eye moves!tons of thanks (Y)

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After watching many videos and reading many resources, I think this is a brilliant video- thank you!

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[@madeleineoverton-thickett9215]

Absolute star of a video! Really helped my understand eye movement (particularly in relation to the oblique muscles) Thanks so much!

[@medsimplified1263]

Thank you for the lovely animation and nicely described. 🤩🤩
P.s. Mnemonic for extraocular muscle innervation
LR6 SO4 R3
Lateral Rectus - Cranial nerve 6
Superior oblique - CN 4
Rest by CN 3

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[@maggy288]

Al3SO4 and LR6
Al- all the remaining EOMs
SO-Superior oblique
LR-Lateral rectus

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[@givemoremhlanga9364]

due to the insertion of the superior oblique muscle, posterior to the insertion of the superior rectus, it should cause lateral rotation of the eyeball not medial rotation as mentioned in the video

[@glamm7runner]

givemore mhlanga no, he was right it is medial rotation

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[@saurabhkumawat9457]

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Thank You Very Much

[@mokhles703]

Thank you for the video.
Can someone please explain how does the superior oblique muscle cause depression of the eye? i cant seem to imagine it.

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