Two years of school, 2 rotations in the field, a whole lot of reading and studying and this is the first time the difference between "ape" and "benediction" has truly been explained. "Aple" hand is the default resting position of median nerve dmg. "Benediction" occurs when a person attempts flexion of all the digits. Got it now, thank you! So simple yet never simple stated anywhere else.
One of the most well-put-together anatomy videos/explanations I've ever seen. From start to finish everything was incredibly well explained with no room for misinterpretation.
At min 6:13 of the video, you mentioned that flexor digitorum superficialis and profundus is active BUT in fact the FDP ulnar part is supplies by Ulnar nerve so the remaining only FDS that will act
omar sameer for those that may have the same confusion, the injury to the ulnar nerve in this case is distal, therefore muscles that are proximal to the injury such as FDP will still be innervated by the ulnar nerve and will be able to do the corresponding action.
this is great! the only thing is that at 6:14 I think the FDP for digits 4 and 5 is also knocked out by an ulnar nerve lesion, so it's only the FDS that contributes to the unopposed flexion...
So what he showed was a DISTAL ulnar nerve lesion if you look at the point where he put the lesion; at this point, the ulnar nerve has most likely provided its motor innervation to the FDP for digits 4 and 5, which is why they wouldn't be affected (based on where he put his lesion). IF the lesion was more proximal, then you would definitely be correct.
THANK YOU SO MUCH! I am a true visual learner so the pictures combined with the excellent explanation helped ALOT. Thank you! - from a stressed PT student
6:13, little bit confused there. You mentioned un opposed FDP 4th and 5th. Isn’t those muscles are also affected when u have Claw hand or Ulnar nerve injury.?
Thanks so much for this, I understand whats happened to me for the last ten years that I hide. Now I at least know what happened after my accident. It was way over my head but I really got the effects and actions very clear! Thanks mate!!!
Great video but I'm confused about one thing: If the FDS is lost in a high median nerve injury, why then are the PIPs of digits IV and V flexed in the depiction of the Sign of Benediction? Shouldn't these digits only be able to flex the DIPs since only the medial half of the FDP would be intact?
At 6:10 you mention that the the extensor digitorum can't resist against the flexor digitorum superficialus and profundus. But the medial aspect of profundus is innervated by the ulnar nerve. So why is there flexion at the dips of digits 4 and 5 in ulnar nerve lesion?
Thank you for the excellent question. When the ulnar nerve is damaged at the wrist (as shown in this video), flexor digitorum profundus function is not impaired since it receives its motor innervation more proximally (i.e., between the elbow and the wrist); thus, there would still be unopposed flexion at the distal interphalangeal joints of digits 4 and 5. If ulnar nerve damage occurs “higher” (i.e., in the cubital tunnel posterior to the medial epicondyle), then flexor digitorum profundus would lose its motor innervation and there would be a corresponding loss of flexion at the distal interphalangeal joints of digits 4 and 5. In fact, this anatomy is responsible for the Ulnar Nerve Paradox, wherein a more distal lesion of the ulnar nerve results in “worse” symptoms -in this case, tighter or more severe “clawing” of the affected digits. In nearly all other cases of peripheral nerve injury the more distal the lesion, the less severe the symptoms. In the interest of time and clarity, a discussion of the Ulnar Nerve Paradox was excluded from the video.
![Hand of Benediction vs the Claw Hand [feat. the Ulnar Paradox]](http://i.ytimg.com/vi/BWhB_B3e4gc/mqdefault.jpg)
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
![The Brachial Plexus II: Animated Review [HD]](/img/n.gif)
Two years of school, 2 rotations in the field, a whole lot of reading and studying and this is the first time the difference between "ape" and "benediction" has truly been explained. "Aple" hand is the default resting position of median nerve dmg. "Benediction" occurs when a person attempts flexion of all the digits. Got it now, thank you! So simple yet never simple stated anywhere else.
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This video worth more than a million dollars, thanks for the video, this is magical!
BEST EXPLANATION EVER - heartfelt thanks from a medical student. Please put up more if you would!
InstaBlaster
One of the most well-put-together anatomy videos/explanations I've ever seen. From start to finish everything was incredibly well explained with no room for misinterpretation.
This explained a confusing 50 min lecture in 8 minutes. Bless.
Adding to the chorus but seriously, thank you, this is SO well done and I finally understand how these injuries work.
Do u suffer from any?
this should be played in all anatomy classes
This is the best video I have ever seen in my life explaining these complex issues so clearly...
WHAT?!! WHY AM I SEEING THIS TODAY! This video singlehandedly outsmarted professors in my university. Kudos
Considering my attention span and the amount of information in this video I am truly amazed that I captured pretty much all that was presented.
What a remarkably well-done video that deserves the highest of praise. This should raise the standard for medical education
I have an exam tomorrow and you saved my great amount of time by your simple explanation, thank you
At min 6:13 of the video, you mentioned that flexor digitorum superficialis and profundus is active BUT in fact the FDP ulnar part is supplies by Ulnar nerve so the remaining only FDS that will act
omar sameer for those that may have the same confusion, the injury to the ulnar nerve in this case is distal, therefore muscles that are proximal to the injury such as FDP will still be innervated by the ulnar nerve and will be able to do the corresponding action.
@@immunealtair2737 Thank you. I was so confused by this.
@@immunealtair2737 by reading omar i got same confusion but right next comment you cleared it thanks
This is so freaking awesome, the fact that you reviewed the muscles and the joint made it so easy. Now I’ll never forget any of these clinical signs
without reading up on the topic, or watching the video. Do you still remember? =)
This explained what several websites failed. Thank you
Fantastic description. Thank you
I love you PhDs, the illustration is much more better than MDs.
This is incredible. I was quite overwhelmed by this info in PA school but this is crystal clear.
soooo helpful- i loved how the animations go way beyond solely diagrams. Thank u!
You just saved me from 30 hours of studying. You're an MVP. Thanks!
Thanks for making our lives easy.
this is great! the only thing is that at 6:14 I think the FDP for digits 4 and 5 is also knocked out by an ulnar nerve lesion, so it's only the FDS that contributes to the unopposed flexion...
I noticed that and puzzled over it for a bit. Glad someone else noticed it and commented.
@@rufussweeneymd Yes, this was my thought as well.
FDP is divided above the wrist so it still remains function.
So what he showed was a DISTAL ulnar nerve lesion if you look at the point where he put the lesion; at this point, the ulnar nerve has most likely provided its motor innervation to the FDP for digits 4 and 5, which is why they wouldn't be affected (based on where he put his lesion). IF the lesion was more proximal, then you would definitely be correct.
This is really the best video about this topic that I have ever watched…
THANKYOU ❤
THANK YOU SO MUCH! I am a true visual learner so the pictures combined with the excellent explanation helped ALOT. Thank you! - from a stressed PT student
Colleges should follow this kind of teaching..which make clear concept in mind...
Precisec....concise...clean clear......thanks so much
have to agree with all prior comments - BEST EXPLANATION EVER - thank you
I have experienced tons of struggles till i watched this amazing video, thanks alot!
Awesome video. Amazing job at explaining the concepts and great pictorals. Saved it for future review!
BEST EXPLANATION EVER - heartfelt thanks from a medical student. Exactly what I was going to say.
Please make more videos!! This has been life saving!!!
Do u suffer from any?
Great explanation of the clinical differences between The Hand of Benediction and ulnar claw
Thanks very much for explaining the causes of these confusing signs.
that was absolutely perfect, so logically explained and i love the animation , one would understood even not a medical student
thank you very much. Greetings from Jamaica
Absolutely simply explained!!!
Hey, this was brilliant! Thanks so much for finding the logic in all of these injuries.
OMG !
This video is life saving !
Thank you very much
Wonderful explanation with excellent animations. Thanks a ton!
This is one hell of a video! Absolutely the best!
We're waiting for another physican guide videos like this one thanks
Thank you so much. I have a test in a few hours and you saved me
Excellent
EXCELLENT!!!!! Hand surgeon level master class!!!!
I haven't seen a video more interesting and understanding than this.. Wow.. Thank you
thank you! never been explained better
Wow @Doctor Eric Laywell, God bless you and your team. Excellent , Excellent video with explanation made super easy.
@Doctor Eric Laywell ...just excellent👍👍👍👍
This was the greatest review ever.
Fabulous video and presentation. Superb quality.
Amazing video and animations. Never quite understood it.
this is quality medical education. This is a standard
Thank you so much for explaining this concept! It was so confusing for me, but you cleared it up with your thorough explanation with great visuals!
Thanks
Perfectly presented- thank you!
😮 OMG , i have been searching for this years.thank you very much. Sir.
Very useful video for explaining a previously complicated concept
I just passed my metacarpal PHD after watching this thorough video. Very informative.
very good ilustration .. good job
That was great. Never understood this well in 7 years of med school and internship thanks haha❤
Clear explanation and helpful animation. This is an incredible vid!
Great videos. Very high quality and get down to the essence of what is important in an approachable way. Please make more animated videos.
6:13, little bit confused there. You mentioned un opposed FDP 4th and 5th. Isn’t those muscles are also affected when u have Claw hand or Ulnar nerve injury.?
Thank you so much for this video! Best explanation on the topic
Thank you so much for explaining this concept!
Excellent video!
Excellent method of clarification .
Thank you. The best one on the topic by far.
Thanks so much for this, I understand whats happened to me for the last ten years that I hide. Now I at least know what happened after my accident. It was way over my head but I really got the effects and actions very clear! Thanks mate!!!
Best explanation. Not even close
Incredibly clear explanations. Thank you!
very well explained!!!!! splendid!!!
The Soviet school anatomists loved to ask about this during exams. Reminded me of medical school so many years back.
Pls do upload more videos found very useful and this was the best best explain I have seen in this topic..... upload videos on anatomy of PNS and CNS
Saved me from my nightmare topic ty very much
Amazing explanation and video! 👍🏻👏🏼
Great video but I'm confused about one thing: If the FDS is lost in a high median nerve injury, why then are the PIPs of digits IV and V flexed in the depiction of the Sign of Benediction? Shouldn't these digits only be able to flex the DIPs since only the medial half of the FDP would be intact?
Perfect explanation!
Incredible video with excellent visuals. Thanks so much for this!
Excellent animation and explanation
Amazing video. You explain very well! 👍🏻
this is amazing
Best explanation ever!! Thank you so much :)
At 6:10 you mention that the the extensor digitorum can't resist against the flexor digitorum superficialus and profundus. But the medial aspect of profundus is innervated by the ulnar nerve. So why is there flexion at the dips of digits 4 and 5 in ulnar nerve lesion?
Thank you for the excellent question. When the ulnar nerve is damaged at the wrist (as shown in this video), flexor digitorum profundus function is not impaired since it receives its motor innervation more proximally (i.e., between the elbow and the wrist); thus, there would still be unopposed flexion at the distal interphalangeal joints of digits 4 and 5. If ulnar nerve damage occurs “higher” (i.e., in the cubital tunnel posterior to the medial epicondyle), then flexor digitorum profundus would lose its motor innervation and there would be a corresponding loss of flexion at the distal interphalangeal joints of digits 4 and 5.
In fact, this anatomy is responsible for the Ulnar Nerve Paradox, wherein a more distal lesion of the ulnar nerve results in “worse” symptoms -in this case, tighter or more severe “clawing” of the affected digits. In nearly all other cases of peripheral nerve injury the more distal the lesion, the less severe the symptoms. In the interest of time and clarity, a discussion of the Ulnar Nerve Paradox was excluded from the video.
@@FSUMedMedia please are there more videos?
Very, very good!!!
excellent explanation
You have saved my exam. THANK YOU
Thanks Dr. Eric. Great work!
I just want to know, how many hours were spent creating this illustration and the overlying narration? Excellent job. Thanks.
You make the best explanations i've seen! Thanks!
wonderful ! very clear and complete .
simply astonishing work! :)
Best explanation ever
Well done!
The best explanation ever!! Thankyou so much doc.
beautiful explanation .thank you
Best explanation EVER!!!!! Now I can really understand it! Thank you
Excellent. Thank you!
Extremely grateful
Well done.
Excellent video here, thank you!!