Actually, in preganglionic injures, SENSATION IS also LOST as pathway to sensory cortex is interrupted...BUT on doing NCS for sensory nerve assessment (SNAP= Sensory nerve Action Potential) it will give a normal SNAP graph because impulse conduction upto DRG is unaffected. In summary = patient will have Horners, winging of scapula, elevated hemi diaphragm, motor and sensation lost, EMG may show loss of innervation to cervical paraspinals (supplied above the brachialplexus) BUT normal SNAP on NCS Hope this helps

@uroshjovanotti

10 ай бұрын

Why is SNAP in NCS in preganglionic injury normal? The integrity of the neuron will also be interrupted?

@drjsm

10 ай бұрын

​​@@uroshjovanotti Remember that the sensory neuron in the DRG is a bipolar neuron. That means, 1 cell body in the DRG and 2 axons. 1 axon that brings signal from receptor into the cell body (INTACT) and the 2nd one that transmits signal via sensory ramus into the spinal cord (DAMAGED IN PREGANGLIONIC INJURY). SNAPs is hence the recording obtained from the intact part of the bipolar sensory nerve in DRG. On the other hand, Motor nerves are axons of anterior horn cells that exit directly from the spinal cord via anterior ramus (DAMAGED IN PREGANGLIONIC INJURY)..

@uroshjovanotti

10 ай бұрын

@@drjsm Good explanation, thanks a lot.

Very informative , the breakdown of the different outcomes was very helpful.

Your videos are extremely well done. So easy to understand. Thank you for these!!!

at the end of your talk you say, " I hope this is helpful". I just want you to know that I feel your two videos that I have seen that you have put out on the brachial plexus are clearest descriptions of the brachial plexus I have ever heard. Thank you so much

Thank you for creating this content. Please consider recommending occupational therapy for patients with brachial plexus injuries

Best doctor of brachial plexus injury

Thnk u so much sir , very helpful 🤗

Thank you Sir

Thank you

How sensory is intact preganglionic injury dorsal root is disconnected so no sensation can go to cns ..and nerve of long bell arise from anterior rami so in preganglionic it must be affect ....explain

hi. may i know what's the reason behind sensory intact and motor deficit in preganglionic injury which resulted in flail arm at 2:26 ? shouldn't sensory be affected since the pathway is interrupted due to the preganglionic injury i.e., proximal to the DRG? I would appreciate it if someone can clarify this for me. thank u :)

@cljamming

2 жыл бұрын

Agreed. Very confusing, since the preganglionic root avulsion would mean total disruption of the sensory pathway. Any insights into this would be very welcome. Thanks

@tomcruise9317

Жыл бұрын

Also why nerve of bell is affected in pre ganglionic ...... and how horner syndrome is affected here

@drjsm

Жыл бұрын

Actually, in preganglionic injures, SENSATION IS also LOST as pathway to sensory cortex is interrupted...BUT on doing NCS for sensory nerve assessment (SNAP= Sensory nerve Action Potential) it will give a normal SNAP graph because impulse conduction upto DRG is unaffected. In summary = patient will have Horners, winging of scapula, elevated hemi diaphragm, motor and sensation lost, EMG may show loss of innervation to cervical paraspinals (supplied above the brachialplexus) BUT normal SNAP on NCS Hope this helps

Amazing🎉

@nabilebraheim

9 ай бұрын

Thanks 😄

انت فنان❤❤❤

Do congenital hip dysplasia please.

Can you please tell me what Kind of Doctor should one see to diagnose these types of injuries?

@gy3041

11 ай бұрын

An orthopedic surgeon

@anilmehta9651

7 ай бұрын

It's neurologist

I wish you were my doctor. I see alot of things you post here that sounds like whats wrong with me after trauma i had and doctors here cant figure it out and dont listen to my symptoms.

👍🏻