This short video demonstrates how the eye muscles work together to move the eye. Get my new (May 2013) interactive book on your iPad, itun.es/i6xT3Yf for pupil examination.
@poobah42o Video IS CORRECT according to the Thieme "Nervous System and Sensory organs". At 23 degree ABduction: SR act as elevator and IR act as despressor of the eye. At maximal ADduction (up to 50 degree): SO act as a depressor and IO act as an levator of the eye.
This is probably a stupid question but the last part you say that rectus and oblique superior gives an intorsion action. So that means that rectus and oblique inferior is doing the opposite, Extorsion?
hi...u didnt tell us whether your problem has started abruptly after any trauma or u have this problem since birth?? u have two visions of the same object..this condition is known as diplopia...in all from what u have told us u may have paralytic strabismus..u didnt say whether u are experiencing vomit like feeling too.. so according to me u should get ur eyes examined for paralytic squint and the treatment is possible..so dont worry..
I did the video because when I was learning this stuff it was very confusing. Hopefully the animation makes it easier to picture how the muscles work together in 3D. I have done an iPad book (iBook) on pupils, but I really need to do the same for eye movement as it mixes people up all the time...Sam
I have a question, I went on a roller coster ride in July and as I was on that roller coaster I squeezed my eyes shut very tight. Specifically the left one as I was leaning more on the bar that went over my head. My eye has not been the same since. I woke up the next morning with my eye pain and red. My pupil in my left eye actually hurt so bad. Light and to focuse on anything was painful. My eye was watering too, there were red bloodshot vains around my whole left eye. I went to the emergency room where they diagnosed it as "eye pain" and then told me to follow up with my provider. The provider, my eye doctor was able to see me that same day. He looked into my eye, seen no torn cornea, nothing in the eye. So, he sent me on my way with a eye drop steroid. Months later, my eye has not been the same. I have these bad flair up in my left eye, that comes along with a bad time headache on the left side of my eye/temple. I am out of hope here that the doctors don't don't what's wrong exactly. Please help and any insight would be helpful at this point. I have nothing to loose.
Another way you can remember what the Superior Oblique does is to visualize the pulley formed by the trochlea, which is always on the nasal side. So, it makes sense that the SO would be aligned parallel with the eye when the eye is turned in, so it would depress. In the same way, when the eye is turned out, it makes sense that the SO is aligned perpendicular to the eye and so it would intort. Hopefully that makes sense. Thanks Sam for the visual. It really helped!
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah. "We created man in the most beautiful form!" (Holy Quran, 95/4)
Also , all recti are adductors except lateral rectus , both obliques are abductors, both superior muscles (superior oblique and superior rectus) are intorters Both inferior muscles (inferior oblique and inferior rectus) are extorters
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah. "We created man in the most beautiful form!" (Holy Quran, 95/4)
The last picture is 100% right, but I need a way to better explain it. I'm discussing the labelled diagram at the end. This shows you how to remember the MAIN ACTIONS of the muscles. Medial and lateral rectus pull the eye in and out, so there is no confusion there. With the eye already abducted, sup. rectus elevates, inf. rectus depresses the eye. With the eye adducted, inferior oblique elevates and sup oblique depresses. Read the transcript, or read my ibook...(will be in iBookstore soon)
I think the idea is that the eyebrows are superior to the eyes as are superior rectus and superior oblique and will intort the globe, following the direction of the arrows which point medially
Thank you for a good video~ I got some questions but first here's what I understand: Actions of muscle MR :turns pupil medially LR :turns pupil laterally SR :turns pupil upwards IR :turns pupil downwards SO :turns pupil laterally downwards IO :turns pupil laterally upwards The diagram, however, shows how to "test" the muscle "separately". With the eye looking laterally, the main muscles in action for looking upward and downward are SR and IR. With the eye looking medially, the main muscles in action for looking upward and downward are IO and SO. What I don't understand is that while we test the SR, for example, by looking laterally then upward so that it is in optimum length for testing, what happens to the IO? Is it contracting? If it does how could looking laterally makes the test for SR ONLY? If it doesn't why is it not functioning? Looking upward laterally is the main function of IO. Does the sequence of looking means something? I'm super-confused!!
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah. "We created man in the most beautiful form!" (Holy Quran, 95/4)
Thanks, great video but I have a question? How do we differentiate between individual movements by one muscle as opposed to ita yoked movement? It took me quite some time to figure out why different sources were saying different things and I believe now that is because there is a difference of when the muscle acts individually or with others, right?
yeah that last diagram is confusing... if you were to look at ur nose so cross eyes and look down and inward.... no Superior Ob is being used. SO is down and outward...as well as intorsion
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah. "We created man in the most beautiful form!" (Holy Quran, 95/4)
Nope, the video is completely correct. I promise! If you have access to it, try looking in the excellent Duanes textbook of Ophthalmology. Volume 1, Chapter 2. The errors I am aware of in my video are mainly with the animation: 1. Not having the superior oblique muscle arising from the annulus of zinn along with the recti muscles. 2. Drawing the optic nerve at about half its true thickness. The basic information about the actions of the extraocular muscles is all sound. Sam
قال تعالى :(قُلْ هُوَ الَّذِي أَنشَأَكُمْ وَجَعَلَ لَكُمُ السَّمْعَ وَالْأَبْصَارَ وَالْأَفْئِدَةَ ۖ قَلِيلًا مَّا تَشْكُرُونَ )الملك/٢٣ Say, "It is He who has produced you and made for you hearing and vision and hearts; little are you grateful." the holy quran
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah. "We created man in the most beautiful form!" (Holy Quran, 95/4)
I would really appreciate some advice. I’ve been getting headaches for over 20 years. After watching this video I suspect it’s due to over straining of my Superior Oblique (this is the location of the pain). Pain is always above my left eye and I believe my left eye is lower than my right eye. I therefore tend to tilt my head to the right to compensate for this. Would this situation put more strain on my Superior Oblique muscle? Thanks for any help!
i want help about 2 months ago my brother hinted my right eye so badly .. after that i felt the pain about 2 weeks but i just ignored it ...but now from last weeks still feeling like my normal eye is different from the right eye .. there is different but not that much ..but i do feel little bit of pain .. and today is the first time that i awake and i was trying to open my right eye it was not opening ..but the normal opened :( .. can you please tell me ho i can treat my eye ..i am really sad about it .. its kind of inward too
I disagree. Keep them short with high words pr minute count please. I'm not sure if I understand your last showcase on how to remember which muscles does what. Is the intorsion and extorsion in regards to an abducted or adducted eye? Or just when its aligned in the center? Or maybe both? It follows your explanation of how the eye is intorts and extorts, that's why I'm confused... thank you!
@boonshofter Woah, you must be hella stressed out to be blowing up on a mere youtube comment like that. Remember to breathe. TH-cam is not a trusted source for anything anyway - it's more entertainment.
Removed all my comments since nobody wants a dialogue with actual sources, just a youtube flame war. Only one other person outside of my comments provided sources. I tried to explain clinical caveats of the physical exam which differ from the actual actions of the muscles, but this went overlooked and went straight to the ad hominem attacks.
@poobah42o I see your FELLOW in STRABISMUS and raise you Christian Lueck who is a PROFESSOR specialising in NEUROOPTHAMOLOGY who graduate top of the class in CAMBRIDGE who writes TEXTBOOK CHAPTERS on this stuff. His lecture notes I'm reading right now agree with the video.
@poobah42o no, your statement disagrees with what the video says. stapsell is correct that the SR and IR elevate and depress the eye, respectively, when the eye is ABducted, not ADdcuted (1:58). he is using a right eye in his example.
@poobah42o no, your statement disagrees with what the video says. stapsell is correct that the SR and IR elevate and depress the eye, respectively, when the eye is ABducted, not ADdcuted (1:58). he is using a right eye in his example.
2:58 for the guide at the end It’s wrong in small part The superior and inferior oblique muscles need to be replaced with superior and inferior recti muscles so the guide will be correct Cuz when u move your eye medially the one responsible now for upward and downward movements are inferior oblique and superior oblique muscles respectively And so the when you move your eyes laterally, now the upward and downward movements are responsible by the superior and inferior recti muscles respectively. It’s minor mistake Please correct me if I am mistaken.
Enjoyed the animation but I do have one suggestion and that is should u choose to make more videos, try speaking a bit more slowly and use more time to explain. overall great vid!! thanks
Oh the mouth noises made this extraordinarily hard to watch.. like drink some water, or stay not so close to the mic.. im having to answer a plethora of questions for my health and med class... My mysophobia is making this very difficult😃👍🏻
The very last part about the eyebrows and intorsion/extortion is not quite clear to me, and it went so fast. From the primary position, the superior oblique intorts & inferior oblique extorts but then you're saying at the end that they both intort??
I also have a question regarding this. Is the extortion then just the opposite because it would be happening on the inferior plane while intorsion is in the superior plane?
The biggest source of confusion for my learning was that performing clinical tests appear to be opposite the muscle movement. This video cleared everything up for me. Thank you!
hello everyone i want to know something related eye disease in which both eye not move in proper way, when we look towards left both eyes simataneously moves towards left but when i moves my eyes towards right my left eye moves completely but right eye get stable in centre in doesn't moves fully towards right so can u tell me whats is the problem in my eye and also i want to tell u when i look normally in front every item look double to me, i m diebetic patient, plz suggest me treatment & doctr
woah - what a trip out - so confusing :( wondering, can you just summarize and for my minimalism and tell me if the arms are connected more so to the eye muscles or are the legs connected in the way for a stronger control of this structure? great video man! your the only one online to describe this in a clear visual way. kudos!! ps. love the way all the muscles look as to holding the one eye, looks like a tent or some cool ropes like 'tendons'- no wonder why there are pyramids in egypt. :)
woah - what a trip out - so confusing :( wondering, can you just summarize and for my minimalism and tell me if the arms are connected more so to the eye muscles or are the legs connected in the way for a stronger control of this structure? great video man! your the only one online to describe this in a clear visual way. kudos!! ps. love the way all the muscles look as to holding the one eye, looks like a tent or some cool ropes like 'tendons'- no wonder why there are pyramids in egypt. :)
Sam is right you know. The last diagram is little vague as he had difficulty in trying to explain it. What the last diagram means is the clinical application of testing their movements. This is because when you look with the eye in the direction indicated(lateral or medial), the muscles that elevate and depress the eye are straight. Therefore providing the movement indicated by the diagram. Remember, these muscles that elevate and depress insert at an angle.
Good day sir, nice video. I'm a second year medical student from Jamaica and i have found your video quite useful. However at 40 secs you said the muscles come from the angulus of "Zinn" . Is that how it is spelt ?. I have never heard that terminology before but i understand them to arise from the angulus tendineus . Thank you for your response
@stapsell hey I'm not sure about your first error.. in my lecture slides is says that the superior oblique actually arises from the sphenoid bone just outside the tendinous ring(annulus of zinn.. so which is right?
I have a great deal of confusion. I have two sources. The first is Duus Topical diagnosis in Neurology. The second is Thieme atlas. Head and Neuroanatomy. Both sources give contradictious information.
damnnn such a good video. i had so much problems reading notes...which one act to intort or extort. awesome! please upload more videos. thank you sooooo much@!!!
Right-o. Superior Oblique - causes intorsion. For intorsion, the 12 o'clock position of the eye will be rotated inwards towards the nose (a person's left eye will rotate counter clock-wise if looking at them). Inferior Oblique - causes extorsion. Extorsion - imagine the 12 o'clock position of the eye. It will move outwards towards the ear (a person's left eye will rotate clockwise when looking at them). The rectus muscles move up and down. The obliques 'spin' the eye.
He's not wrong... His last picture is about movements of the eye WHILE IN THAT POSITION. Straight aligned muscles move the eye in that one plane only, hence why the lateral and medial rectus muscles in the RESTING POSITION only move the eye in their respective directions and nothing else. The superior and inferior rectus muscle attachments are slightly off center hence why they also aid partially in medial movement while the superior and inferior obliques, also off center aid partially in lateral movement. If these four were straight attachments we wouldn't be able to utilize all angles of continuous movement of the eye while it was elevated or depressed. They allow for us to move our eye in the directed of every plane between the horizontal and vertical planes. Since the inferior and superior obliques attach more laterally to aid in medial movement of they eye in the RESTING POSITION, so when the eye is abducted (moved laterally) their attachment becomes straight causing them to now only act in elevation and depression. However, the rectus muscles attach more medially since they aid in lateral rotation in the RESTING POSITION, so when the eye is instead adducted (moved medially) the same concept applies to their attachment straightening causing the elevation and depression. Dartmouth backs it and explains it too if its not clear to anyone still!!! Hope I helped clear things up for anyone who watches!! www.dartmouth.edu/~dons/part_1/chapter_4.html
Me roaming here in 2024 is crazy💀
SAME this is like my bi-medical school opthall revision video
Best video regarding eye movements I have seen
@poobah42o Video IS CORRECT according to the Thieme "Nervous System and Sensory organs". At 23 degree ABduction: SR act as elevator and IR act as despressor of the eye. At maximal ADduction (up to 50 degree): SO act as a depressor and IO act as an levator of the eye.
This is probably a stupid question but the last part you say that rectus and oblique superior gives an intorsion action. So that means that rectus and oblique inferior is doing the opposite, Extorsion?
can having cataract surgery damage an eye muscle?
Cataract is a lens disorder I don't know if it has something to do with the eye muscles
It is good for students sir
hi...u didnt tell us whether your problem has started abruptly after any trauma or u have this problem since birth?? u have two visions of the same object..this condition is known as diplopia...in all from what u have told us u may have paralytic strabismus..u didnt say whether u are experiencing vomit like feeling too..
so according to me u should get ur eyes examined for paralytic squint and the treatment is possible..so dont worry..
It’s 2022 yet this 2008’ vid has the best explanation of all new videos
I did the video because when I was learning this stuff it was very confusing. Hopefully the animation makes it easier to picture how the muscles work together in 3D. I have done an iPad book (iBook) on pupils, but I really need to do the same for eye movement as it mixes people up all the time...Sam
I'm still watching your video (2021)
I have a question, I went on a roller coster ride in July and as I was on that roller coaster I squeezed my eyes shut very tight. Specifically the left one as I was leaning more on the bar that went over my head. My eye has not been the same since. I woke up the next morning with my eye pain and red. My pupil in my left eye actually hurt so bad. Light and to focuse on anything was painful. My eye was watering too, there were red bloodshot vains around my whole left eye. I went to the emergency room where they diagnosed it as "eye pain" and then told me to follow up with my provider. The provider, my eye doctor was able to see me that same day. He looked into my eye, seen no torn cornea, nothing in the eye. So, he sent me on my way with a eye drop steroid. Months later, my eye has not been the same. I have these bad flair up in my left eye, that comes along with a bad time headache on the left side of my eye/temple. I am out of hope here that the doctors don't don't what's wrong exactly. Please help and any insight would be helpful at this point. I have nothing to loose.
Thanku 🥺
The subtitles aren't matching with voice
Thank you soo much sir,it helped a lot👍🤩
Another way you can remember what the Superior Oblique does is to visualize the pulley formed by the trochlea, which is always on the nasal side. So, it makes sense that the SO would be aligned parallel with the eye when the eye is turned in, so it would depress. In the same way, when the eye is turned out, it makes sense that the SO is aligned perpendicular to the eye and so it would intort. Hopefully that makes sense. Thanks Sam for the visual. It really helped!
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah.
"We created man in the most beautiful form!" (Holy Quran, 95/4)
i got a more easy way. all rectus move according to their names. oblique moves Opposite and torsion. so4 lr6. all others 3.
Thank you! Hope your career in medicine is going well. Mine is just starting.
@@coldasice7x hows it going
Also , all recti are adductors except lateral rectus ,
both obliques are abductors,
both superior muscles (superior oblique and superior rectus) are intorters
Both inferior muscles (inferior oblique and inferior rectus) are extorters
@@hafsatitan4667 easy to understand. Thanx
@@coldasice7x where are you now in your Journey of Medicine
This is amazing work. The animations are perfect, your explanation is clear, eloquent and succinct. Massive respect to you and your work. Thank you.
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah.
"We created man in the most beautiful form!" (Holy Quran, 95/4)
The last picture is 100% right, but I need a way to better explain it. I'm discussing the labelled diagram at the end. This shows you how to remember the MAIN ACTIONS of the muscles. Medial and lateral rectus pull the eye in and out, so there is no confusion there. With the eye already abducted, sup. rectus elevates, inf. rectus depresses the eye. With the eye adducted, inferior oblique elevates and sup oblique depresses. Read the transcript, or read my ibook...(will be in iBookstore soon)
15 years later and your video is still very helpful
Thank you very much
God bless you 🙏
i still don't get the part about the eyebrows drawn into arrows and how you remmeber that sup and SO intort
I think the idea is that the eyebrows are superior to the eyes as are superior rectus and superior oblique and will intort the globe, following the direction of the arrows which point medially
Ah I see! thanks!
The people who watched the video and the people who followed are not the same😂
Thank you for a good video~ I got some questions but first here's what I understand:
Actions of muscle
MR :turns pupil medially
LR :turns pupil laterally
SR :turns pupil upwards
IR :turns pupil downwards
SO :turns pupil laterally downwards
IO :turns pupil laterally upwards
The diagram, however, shows how to "test" the muscle "separately".
With the eye looking laterally, the main muscles in action for looking upward and downward are SR and IR.
With the eye looking medially, the main muscles in action for looking upward and downward are IO and SO.
What I don't understand is that
while we test the SR, for example, by looking laterally then upward so that it is in optimum length for testing, what happens to the IO? Is it contracting? If it does how could looking laterally makes the test for SR ONLY? If it doesn't why is it not functioning? Looking upward laterally is the main function of IO.
Does the sequence of looking means something? I'm super-confused!!
It's been 8 years. I'm wondering did your doubt get clear. I also have the same doubt
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah.
"We created man in the most beautiful form!" (Holy Quran, 95/4)
So much in love with this video! Made my life so much easier! Thanks a zillion, you're awesome!
Hi great video! Just a doubt - in your final diagram shouldn't the sup. oblique and inf. oblique be swapped around?
utooobesurfer No, the diagram is the right way around, representing the actions of the oblique muscles, which are sort of upside down.
utooobesurfer actually the diagram make it so easy
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Привет
Thanks, great video but I have a question? How do we differentiate between individual movements by one muscle as opposed to ita yoked movement? It took me quite some time to figure out why different sources were saying different things and I believe now that is because there is a difference of when the muscle acts individually or with others, right?
that diagram to remember actions absolutely owns
why do you have few videos ?
there are lots of topics you can illustrate. th video is so brilliant
No I don't. I say the same as wikipedia. Try reading along with the transcript at eyevideos.blogspot.com
I usually don't comment.... But ur work is mind blowing sir! I really understood all of them,... N is a long term memory now! Thank u
Really helpful! It's the night before my exam and I've just seen this... I wish I had known about this video before!
Thank you so much!! I am suffering studying strabismus >_
yeah that last diagram is confusing... if you were to look at ur nose so cross eyes and look down and inward.... no Superior Ob is being used. SO is down and outward...as well as intorsion
I love the little song at the end LOL :)
This is such an efficient way of learning about eye muscles! Thanks!
Good video but you need to hydrate yourself before speaking on videos dude. Squelchy sounds are offputting!
thanks! the eyeball animation was very helpful!
Great!! We need more teachers like you in the medical field👍
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah.
"We created man in the most beautiful form!" (Holy Quran, 95/4)
It was best explanation old is gold 🥇
Nope, the video is completely correct. I promise! If you have access to it, try looking in the excellent Duanes textbook of Ophthalmology. Volume 1, Chapter 2.
The errors I am aware of in my video are mainly with the animation:
1. Not having the superior oblique muscle arising from the annulus of zinn along with the recti muscles.
2. Drawing the optic nerve at about half its true thickness.
The basic information about the actions of the extraocular muscles is all sound.
Sam
قال تعالى :(قُلْ هُوَ الَّذِي أَنشَأَكُمْ وَجَعَلَ لَكُمُ السَّمْعَ وَالْأَبْصَارَ وَالْأَفْئِدَةَ ۖ قَلِيلًا مَّا تَشْكُرُونَ )الملك/٢٣
Say, "It is He who has produced you and made for you hearing and vision and hearts; little are you grateful." the holy quran
This simple diagram at 2:42 is all I needed..! Thank you sooooo much! You’re brilliant :)
Man reflects the perfect art of creation of Almighty Allah. Such a perfect man cannot come into being "spontaneously" or "accidentally" as atheism claims. Man is the creation of Almighty Allah.
"We created man in the most beautiful form!" (Holy Quran, 95/4)
I would really appreciate some advice.
I’ve been getting headaches for over 20 years. After watching this video I suspect it’s due to over straining of my Superior Oblique (this is the location of the pain). Pain is always above my left eye and I believe my left eye is lower than my right eye. I therefore tend to tilt my head to the right to compensate for this. Would this situation put more strain on my Superior Oblique muscle? Thanks for any help!
i want help about 2 months ago my brother hinted my right eye so badly .. after that i felt the pain about 2 weeks but i just ignored it ...but now from last weeks still feeling like my normal eye is different from the right eye .. there is different but not that much ..but i do feel little bit of pain .. and today is the first time that i awake and i was trying to open my right eye it was not opening ..but the normal opened :( .. can you please tell me ho i can treat my eye ..i am really sad about it .. its kind of inward too
Great graphics! Makes it so much easier to visualise the muscles compared to 2D print.
I disagree. Keep them short with high words pr minute count please. I'm not sure if I understand your last showcase on how to remember which muscles does what. Is the intorsion and extorsion in regards to an abducted or adducted eye? Or just when its aligned in the center? Or maybe both? It follows your explanation of how the eye is intorts and extorts, that's why I'm confused... thank you!
I've spent so long trying to find some logic to the EOM rather than just memorizing which muscle does what... thank you so much!
@boonshofter Woah, you must be hella stressed out to be blowing up on a mere youtube comment like that. Remember to breathe. TH-cam is not a trusted source for anything anyway - it's more entertainment.
I got right eye damage from a childhood accident.... glides at times
Removed all my comments since nobody wants a dialogue with actual sources, just a youtube flame war. Only one other person outside of my comments provided sources. I tried to explain clinical caveats of the physical exam which differ from the actual actions of the muscles, but this went overlooked and went straight to the ad hominem attacks.
@poobah42o I see your FELLOW in STRABISMUS and raise you Christian Lueck who is a PROFESSOR specialising in NEUROOPTHAMOLOGY who graduate top of the class in CAMBRIDGE who writes TEXTBOOK CHAPTERS on this stuff. His lecture notes I'm reading right now agree with the video.
@poobah42o no, your statement disagrees with what the video says. stapsell is correct that the SR and IR elevate and depress the eye, respectively, when the eye is ABducted, not ADdcuted (1:58). he is using a right eye in his example.
@poobah42o no, your statement disagrees with what the video says. stapsell is correct that the SR and IR elevate and depress the eye, respectively, when the eye is ABducted, not ADdcuted (1:58). he is using a right eye in his example.
Found this in Sam Websters favourite playlist
2:58 for the guide at the end
It’s wrong in small part
The superior and inferior oblique muscles need to be replaced with superior and inferior recti muscles so the guide will be correct
Cuz when u move your eye medially the one responsible now for upward and downward movements are inferior oblique and superior oblique muscles respectively
And so the when you move your eyes laterally, now the upward and downward movements are responsible by the superior and inferior recti muscles respectively. It’s minor mistake
Please correct me if I am mistaken.
Enjoyed the animation but I do have one suggestion and that is should u choose to make more videos, try speaking a bit more slowly and use more time to explain. overall great vid!! thanks
Oh the mouth noises made this extraordinarily hard to watch.. like drink some water, or stay not so close to the mic.. im having to answer a plethora of questions for my health and med class... My mysophobia is making this very difficult😃👍🏻
Thank u sir.could u show exercises to maintain these muscles.i am 64yrs and now seeing weakness I my eyes 🤗👍❤❤
When the eyes are adducted, the inferior oblique muscle is responsible for elevation? I don't quite understand the intuition behind this anatomy..
Beautiful, very well explained
Thanks so much, it's more informative video, please continue.
The superior rectus and inferior oblique, as well as the superior oblique and inferior rectus need to be switched.
@hcube3000 either that, or the image used is the wrong one (due to the position of the superior oblique)
The very last part about the eyebrows and intorsion/extortion is not quite clear to me, and it went so fast. From the primary position, the superior oblique intorts & inferior oblique extorts but then you're saying at the end that they both intort??
I also have a question regarding this. Is the extortion then just the opposite because it would be happening on the inferior plane while intorsion is in the superior plane?
@poobah42o Yeah, he does say aBducted in the video, whereas the movement should be aDducted @1:57
i don't think that the text is right
Thank you for this video, needed this to understand for my mrcs exam.
Thank you sir. 👍 good explanation
Perhaps it's just my poor eyesight, but the close up looks like Steve 'Interesting' Davis....
I'm here today 7/7/2024..
great animation and explanation movements.
The biggest source of confusion for my learning was that performing clinical tests appear to be opposite the muscle movement. This video cleared everything up for me. Thank you!
I still dont quite get it, could you summarise please?
This a wonderful video. Thank u!
Models done in blender.
Great video. Very well put together and nice way of remembering the movements at the end.
Thank you so much very helpful
Thanks for wonderful explanation 🙂
It was great! Thank you :)
THIS CNFUSED ME EVEN MORE IM GONNA CRY
Intorsion/extortion by recti were not explained.
this is amazing! what I had been trying to read and understand for an hour... explained and understood in 5minutes! great vid! :)
hello everyone i want to know something related eye disease in which both eye not move in proper way, when we look towards left both eyes simataneously moves towards left but when i moves my eyes towards right my left eye moves completely but right eye get stable in centre in doesn't moves fully towards right so can u tell me whats is the problem in my eye and also i want to tell u when i look normally in front every item look double to me, i m diebetic patient, plz suggest me treatment & doctr
woah - what a trip out - so confusing :(
wondering, can you just summarize and for my minimalism and tell me if the arms are connected more so to the eye muscles or are the legs connected in the way for a stronger control of this structure?
great video man! your the only one online to describe this in a clear visual way. kudos!!
ps. love the way all the muscles look as to holding the one eye, looks like a tent or some cool ropes like 'tendons'- no wonder why there are pyramids in egypt.
:)
woah - what a trip out - so confusing :(
wondering, can you just summarize and for my minimalism and tell me if the arms are connected more so to the eye muscles or are the legs connected in the way for a stronger control of this structure?
great video man! your the only one online to describe this in a clear visual way. kudos!!
ps. love the way all the muscles look as to holding the one eye, looks like a tent or some cool ropes like 'tendons'- no wonder why there are pyramids in egypt.
:)
Sam is right you know. The last diagram is little vague as he had difficulty in trying to explain it. What the last diagram means is the clinical application of testing their movements. This is because when you look with the eye in the direction indicated(lateral or medial), the muscles that elevate and depress the eye are straight. Therefore providing the movement indicated by the diagram. Remember, these muscles that elevate and depress insert at an angle.
16 years later awwww its crazy
Good day sir, nice video. I'm a second year medical student from Jamaica and i have found your video quite useful. However at 40 secs you said the muscles come from the angulus of "Zinn" . Is that how it is spelt ?. I have never heard that terminology before but i understand them to arise from the angulus tendineus . Thank you for your response
Was all this created by accident?!
🏋🏽♀️🔥
@stapsell hey I'm not sure about your first error.. in my lecture slides is says that the superior oblique actually arises from the sphenoid bone just outside the tendinous ring(annulus of zinn.. so which is right?
I have a great deal of confusion. I have two sources.
The first is Duus Topical diagnosis in Neurology. The second is Thieme atlas. Head and Neuroanatomy. Both sources give contradictious information.
Very helpful..but it fails to explain abduction by SO and IO..adduction by SR n IR...
damnnn such a good video. i had so much problems reading notes...which one act to intort or extort. awesome! please upload more videos. thank you sooooo much@!!!
Right-o.
Superior Oblique - causes intorsion. For intorsion, the 12 o'clock position of the eye will be rotated inwards towards the nose (a person's left eye will rotate counter clock-wise if looking at them).
Inferior Oblique - causes extorsion. Extorsion - imagine the 12 o'clock position of the eye. It will move outwards towards the ear (a person's left eye will rotate clockwise when looking at them).
The rectus muscles move up and down. The obliques 'spin' the eye.
thank you very much for making the incredible video which makes this complex task straightforward
I feel like this is going to be recommended to everyone soon.
That was great 👌🏻 I completely understand
Thanks 🙏
Hello sir, can you make a video on how tension of these muscles elongate the eyeballs?
I would make them more similar to Ackland's anatomy videos. They go at a relatively easy pace with enough time for viewers to write annotations.
Very informative
@MrCreightonian Btw, enjoy the many years of scut work up through PGY-1 and in your case possibly longer whilst your ego becomes humbled.
Hi Sam! Appreciate the video but the transcription is hilarious. Better change it. Thanks!
He's not wrong... His last picture is about movements of the eye WHILE
IN THAT POSITION. Straight aligned muscles move the eye in that one plane only, hence why the lateral and medial rectus muscles in the RESTING POSITION only move the eye in their respective directions and nothing else.
The superior and inferior rectus muscle attachments are slightly off center hence why they also aid partially in medial movement while the superior and inferior obliques, also off center aid partially in lateral movement. If these four were straight attachments we wouldn't be able to utilize all angles of continuous movement of the eye while it was elevated or depressed. They allow for us to move our eye in the directed of every plane between the horizontal and vertical planes.
Since the inferior and superior obliques attach more laterally to aid in medial movement of they eye in the RESTING POSITION, so when the eye is abducted (moved laterally) their attachment becomes straight causing them to now only act in elevation and depression. However, the rectus muscles attach more medially since they aid in lateral rotation in the RESTING POSITION, so when the eye is instead adducted (moved medially) the same concept applies to their attachment straightening causing the elevation and depression.
Dartmouth backs it and explains it too if its not clear to anyone still!!! Hope I helped clear things up for anyone who watches!!
www.dartmouth.edu/~dons/part_1/chapter_4.html
Thank you so much! This topic is so confusing! This is the first video out of dozens that answered all my questions!
15 year old video that perfectly explains the concept! Kudos!