Primary underaction (e.g. left superior oblique). • Secondary overaction of the contralateral synergist or yoke muscle (right IR; Hering law). • Secondary overaction and later contracture of the unopposed ipsilateral antagonist (left IO; Sherrington law). • Secondary inhibition of the contralateral antagonist (right SR; Hering and Sherrington laws).
Dr, which one would be the difference to starting with the palsy muscle's contralateral synergistic muscle (yok muscle), then with the contralateral synergistic muscle's homolateral antagonist (Sherrington's law) and finally with the homolateral antagonist's contralateral synergistic muscle (Hering's law) instead this method? I mean we get the same results but it's just personal preference? Or there is a good explanation for that. Thank you
Is the yoke pair muscle of the superior oblique not the superior rectus? I know both SR and IO act to elevate the eye, but the SR causes abduction, in antagonism to the adduction of the SO. Please let me know! I suppose it's likely not as simple as direct pairs as more than two muscles act in elevation or depression?
I answered same about Sheringtons law of reciprocal innervation and my examiners disagreed 😂 but I told them the same answer thrice even though disagreed, I was firm, they needed to learn things first before taking others tests...
Thats Reciprocal Disinnervation Called Sherrington`s law Equal Innervation is Herrington`s Law Watch the video again I think thats what i understood please correct me too if i am mistaken.
i think there is some confusion .....its not the superior rectus which will overact,,,it should be the inferior rectus( the contralateral synergist) which will overact when we block the ipsilateral antagonist (IO)?????? plz correct me
the RT.(inferior oblique) is overact so doesn't receive innervation or **decreasing in its innervation**b/c the RT.(superior oblique) is underact for any reason those muscles are opposite in actions in the RT.eye (antagonistic action to each others) so ,in the LT. eye the synergistic muscle for the over act RT MS. (I.O) is the LT. (superior rectus ) so this ms also wont receive innervation b/c its ( yoke ms. for RT.I.O) MEANS AGONIST MS. IN THE FIELD OF ACTION ELEVATION OF BOTH EYES
You have an incredible way of explaining difficult concepts in an easy to understand format. A sign of an excellent teacher.
And this is rare in Physicians!
whoa this isn't the video I was looking for but I understood everything you were said. You're definitely a good teacher
This is just excellent. Well done.
So good at what he does
You're just so good sir
Thank you it is amazing to explain fallen eye syndrome in between
This is so interesting, learned so much, in such a short space of time. Wait, this needs to be on Tiktok!
thanks for posting, amazing video!
Your explanations are mind blowing ❤
Amazing!!!❤
Amazing! Thank u
Bravo !
Thank you
Primary underaction (e.g. left superior oblique).
• Secondary overaction of the contralateral synergist or yoke muscle (right IR; Hering law).
• Secondary overaction and later contracture of the unopposed ipsilateral antagonist (left IO; Sherrington law).
• Secondary inhibition of the contralateral antagonist (right SR; Hering and Sherrington laws).
Which eye do you put the prism over to measure the primary deviation (prism over non paretic eye?) ? Secondary deviation ( prism over paretic eye) ?
Can you also explain Listing's plane/law?
Dr, which one would be the difference to starting with the palsy muscle's contralateral synergistic muscle (yok muscle), then with the contralateral synergistic muscle's homolateral antagonist (Sherrington's law) and finally with the homolateral antagonist's contralateral synergistic muscle (Hering's law) instead this method? I mean we get the same results but it's just personal preference? Or there is a good explanation for that.
Thank you
👍👍
Is the yoke pair muscle of the superior oblique not the superior rectus? I know both SR and IO act to elevate the eye, but the SR causes abduction, in antagonism to the adduction of the SO.
Please let me know! I suppose it's likely not as simple as direct pairs as more than two muscles act in elevation or depression?
I answered same about Sheringtons law of reciprocal innervation and my examiners disagreed 😂 but I told them the same answer thrice even though disagreed, I was firm, they needed to learn things first before taking others tests...
Thats Reciprocal Disinnervation Called Sherrington`s law
Equal Innervation is Herrington`s Law
Watch the video again
I think thats what i understood please correct me too if i am mistaken.
what will happen if right superior rectus is paralysed?
i think there is some confusion .....its not the superior rectus which will overact,,,it should be the inferior rectus( the contralateral synergist) which will overact when we block the ipsilateral antagonist (IO)?????? plz correct me
the RT.(inferior oblique) is overact so doesn't receive innervation or **decreasing in its innervation**b/c the RT.(superior oblique) is underact for any reason those muscles are opposite in actions in the RT.eye (antagonistic action to each others) so ,in the LT. eye the synergistic muscle for the over act RT MS. (I.O) is the LT. (superior rectus ) so this ms also wont receive innervation b/c its ( yoke ms. for RT.I.O) MEANS AGONIST MS. IN THE FIELD OF ACTION ELEVATION OF BOTH EYES
Yes that is called fallen eye syndrome
DVD (dissociated vertical Deviation) doesn't obey hearings law and Duane type I doesn't obey sherringtons law.
Ok
Up
Plz write LSR not LSM/it's confusing
150923