Extraocular muscles tutorial

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This tutorial covers the anatomy, actions and innervation of the extraoccular (eye) muscles.

[@thineskrishna3118]

By far the best video on extraoccular muscles I have come across on the web. Thank you.

[@TheNotedAnatomist]

Thanks Krishna ... Glad it was helpful.

[@billanthony8230]

Thanks for explaining in under 7 mins what my lecturer couldn't in two hours!

[@bnfgh123]

After five years in medical school I now finally understand how the extraocular muscles work.

[@fmf8699]

the best video about extra ocular muscles ever

[@ShailyMehtayay]

Amazing. Thank you so much, couldn't get my head around this for days.

[@blacktongs]

Woah that is what learning is meant to be! Fun! And easy to understand! Thank you so much for your work. I really admire you.

[@vaibhavjain3234]

The best presentation on RUclips i ever seen on extraocular muscles.!♥️

[@clarisalolita4783]

Finally! After surfing for few days through youtube, I found a video that gave the best explanation how that 23 degree axis' differences did their job. Thank you very much!

[@TheNotedAnatomist]

My pleasure ... i am happy that the tutorial was helpful.

[@Munatraveldiary]

This is by far the best video, thank you so much :)

[@calanside15]

You learn as well as explain at a high level, well that's an ability to admire👋🏽

[@ilnyun]

Great eye movement explanation! Clear and understandable!

[@ezdoyle701]

This is excellent, explained so clearly thankyou!

[@muhamadfachriwijaya]

Of some videos I watched, this explains the movement best!

[@judealghanbar3117]

King of anatomy !!!!!!

[@sentinelislander5239]

much simplified and understood...thanks

[@baniruddha8667]

Had great confusion about the action of so & io.. Thank u sir to make my concept crystal clear

[@opticoopticians813]

VERY SIMPLE BUT TOO THE POINT DETAILED EXPLANATION. EXCELLENT

[@lukmanalem4229]

Thank you so much, sir, this is the best tutorial on extraocular muscles made

[@mirmuhammad9353]

Most useful video on eye muscles action thank you so much

[@yazanahmad8926]

Thank you I was lost in eye movement you saved me ................

[@jomanaakram]

This is by far the best video thanks a lot

[@TheNotedAnatomist]

Glad it helped

[@user-ed9ue7mc5y]

Finally got it!! thanks a lot

[@goodman5836]

Brilliant!

[@amine3226]

Thank you so much!

[@temitopeadeyemi7393]

Dear NotedAnatomist thank you for the video but could you please explain further the part where you said the axis of the orbit and that of the eyeball are not the same. Thank you

[@rochellemabalay1636]

Thanks for this video!

[@tajindersingh5725]

thanks anatomist god bless you}

[@ahmedzakaria356]

it is excellent Sir! I am wandering if you could provide the ppt for the videos if possible?

[@thilinaalagiyawanna3680]

Thank you very much

[@kendall2004]

What a great video

[@TheNotedAnatomist]

Thank you!

[@user-bo3nb6jt2t]

thank you

[@enmedecinedocteur4304]

excellent , perfect , très bien

[@TheNotedAnatomist]

Merci

[@thetamishere]

I'm a bit confused with the clinical testing diagram. how come in the clinical, when u do the H and make the eye look up and in, its labeled the IO instead of the SR. doesn't the SR make you look up and in? it makes sense if that was a representation of the Left eye...is that a mistake?

[@TheNotedAnatomist]

+Tam Nguyen Hi Tam, this is a confusing element for many medical students. Watch this other tutorial i have about clinically testing eye muscles/nerves ... does this help? ruclips.net/video/3J2UZiLVZKA/видео.html

[@thetamishere]

Thank you!

[@TheNotedAnatomist]

+Tam Nguyen Did that help Tam?

[@TheNotedAnatomist]

+Tam Nguyen The challenge here is knowing the difference between the "anatomical" action an eye muscle produces (i.e., the SR moves the eye up and in) versus the "clinical" movement used to test the eye muscle (i.e., you clinically test the SR by abducting then elevating the eye). With the MR and LR muscles it is easy because the MR is the only one muscle that adducts and the LR is the only muscle that abducts the eye in the horizontal plane. Therefore, the "anatomical" actions and "clinical" movements of the MR and LR are the same.
However, when elevating the eye (moving the eye up in the vertical axis) there are two muscles working together (SR moves the eye up and in and IO moves the eye up and out). Therefore, in order to test one muscle (SR) it must be isolated from the other muscle (IO). This is accomplished by moving the eye in such a way as to take away the biomechanical advantage of one muscle in the vertical plane. When an eye is abducted (looking laterally to the wall) this movement removes the biomechanical advantage of the IO from looking up (the movement produced by the IO on an abducted eye is extorsion not elevation). As such, the only eye muscle able to elevate an abducted eye is the SR. Does this help?
Here is a link to a website that is very helpful for testing these concepts: cim.ucdmc.ucdavis.edu/eyes/version15/eyesim.html

[@thetamishere]

+The Noted Anatomist yes definitely cleared things up!

[@A--qs2oi]

THANK YOU SO MUCH

[@TheNotedAnatomist]

You're welcome!

[@akankshasingh-yj2ob]

Good video

[@tungluu-e6q]

But why do have the different between anatomical and clinical testing ?

[@user-eh9we1dm2w]

Thank u alot

[@Dr.samaasalah]

It.s amazing video

[@TheNotedAnatomist]

Thank you so much 😀

[@Dr.samaasalah]

Thank you from Egypt

[@FMW110]

i love youuuuuuuu 😭😭😭

[@radhikaramgundamwar6236]

Best video

[@islamislife1780]

Thanks🥰

[@TheNotedAnatomist]

You’re welcome 😊

[@amanofcultur9903]

I can always count on The noted anatomist😌🙏

[@KD-um3sv]

👌👌👌

[@saraabdo2333]

is eye ball axes differ from fick's axes
different from this
www.cybersight.org/bins/volume_page.asp?cid=1-2161-2163-2175

[@TheNotedAnatomist]

No there are the same. I focused primarily on the horizontal and vertical axes in this tutorial.

[@yeabsrat5972]

Best

[@infoscope9870]

👏

[@cat-bien-1173]

😊😊😊