Nerve conduction Studies and Electromyography (NCS and EMG) - Basics and Clinical interpretation

As surgeons, we often send our patient for a Nerve Conduction Study or an EMG study as we need to know more about the problem that our patient has presented with. It would be good if we are able to interpret the findings, so that we can use the information to understand the problem better, and plan the management schedule.
This video discusses the basics of Nerve Conduction studies - Sensory and Motor, Needle Electromyographic Studies, Evoked Potentials, Intra-operative Nerve Studies and the interpretation and applications, and the use of these studies in the post-operative period to follow the growth of the nerve.

[@The-Humble-Trader]

I was wasting my time on big books with unnecessary details, but your video presentation has answered all my questions. Thank you.

[@GKHandSurgery]

Very kind of you, Sibet Hassan! Thank you.

[@sundaramnagarajan6121]

Informative...good ...thanks

[@myreddys]

Thank you sir for simplifying the topic make us understand easily.

[@keshavmandalaneni6769]

Absolutely fantastic, full of content yet very succinct. Thank you very much, Sir.

[@shanmugapriyachinnaiyan2976]

Thank u so much sir. Not only for surgeons,but also for physiologists like me,u ve made the concepts very simple,in a nutshell which made it easier for teaching my Postgraduates of MD Physiology. Thank u once again sir

[@GKHandSurgery]

🙏🏻🙏🏻🙏🏻

[@Whyso6796]

Respected sir, your presentation and explanation about this topic is absolutely terrific sir Thank you for the knowledge Best wishes

[@shayaanp9207]

awesome thank you so much for simple explanation for complicated subject

[@aliasgermoaiyadi7080]

Very well explained.. Made it easy

[@HemavardhiniS-vs3uj]

Clear cut explanation sir....thanks a lot and expecting more lectures.

[@GKHandSurgery]

Thank you very much!

[@abuwadie3]

Hello sir. Thanks for sharing. I had an EMG done roughly 3 weeks ago to investigate muscle twitching in my right arm. ( not sure if that was recommended ). The emg was uncomfortable. I jumped at one point during the exam during the NVC part. The examiner apologised. It was over my ulnar nerve. I was told my EMG was normal. Apart from a mild ulnar neuropathy ( velocity 40) I was unaware nor did I have symptoms of neuropathy prior to the exam ever . Now 3 weeks later and i am still having excruciating burning in my palm 5th and 4th digit and shocky feelings in my arm after the EMG, all of which is new to me. Is this normal? Can the emg cause nerve damage ? If so how can I find out? I was told by a colleague that during the needle portion no needles was placed near my ulnar or elbow region. Can the volts during NVC cause nerve damage or irritation that lasts this long ? Are EMG standardised so that the examiner cannot exceed unsafe voltage? And is any of this temporary from your experience? Thank you kindly for any input you may have.

[@faisalriaz5100]

Excellent

[@GuitarDoco]

Very helpful At 14:08 it says that difference in latency divided by time gives the MNCV. But latency is a measure of time, and there is no measure of DISTANCE in this formula.... hope it is not an error.

[@balajijaganathan]

Thanks for the informative video sir

[@devajyotiguin1626]

Thank you Sir. Very helpful...

[@Dr-789]

Well explained

[@singaramsrihari]

Thank you, Sir Regards

[@hagaremad5856]

Thank you Very helpful

[@abdiqaws9136]

Thank you very much

[@aswathikadavath7580]

Very informative..

[@VinayKumar-jp3ho]

Thank you sir

[@bhavyaj96]

A doubt sir. How is proximal latency (in milli second) - distal latency ( in ms) divided by time giving a value in units of metre/second?

[@karloangelocamagay9485]

thank you sir!

[@gamaltaher9714]

Good, thanks

[@davinderkoli5382]

Sir why do we perform NCS after 10-12 days and EMG after 3-4 weeks..?? Is it related to pathophysiology of nerve?? If yes please tell sir.🙏🏻

[@geekygirl648]

Can we fully recover from winged scapula If nerve is involved? ( Cause was back punch in an accident almost 5 years ago )

[@GKHandSurgery]

Depends on the type of injury to the nerve. Mild or severe.

[@dr.mariam9004]

Do you do courses online? I would like to have some online classes with you if it’s possible?!

[@GKHandSurgery]

Not as yet, but I am planning to start soon. Thank you.

[@sweetyrai1972]

Very nice video

[@GKHandSurgery]

Thank you, Anshi Rai!

[@sunitachoudhary8653]

Sir nr on NCv graph what does it reveal

[@Maxman_adventures]

Thank you, sir!

[@vishnudev01]

Thank you sir :)

[@sadiksaleem1510]

Thankyou sir....

[@dhaneshs3618]

14:18 sir nerve conduction velocity equation is wrong It should be ncv = distance between proximal and distal points / ( proximal latency - distal latency)

[@GKHandSurgery]

Thank you Dhanesh. I’ll verify.

[@fobin1985]

Thank you gk sir

[@kraggy5279]

Can I send you my results of my emg. My orthopedic surgeon said he's never seen any type of results. Had a tjr and ended up with femoral neuropathy

[@GKHandSurgery]

Yes, please send to [e-mail]

[@kraggy5279]

Tjr- I meant tkr( total knee replacement)

[@kraggy5279]

Thank you for your time and wonderful videos

[@CutiePie232]

Doctor i did ncv... Now my hand still hurts me so much.. There's needles feeling

[@bhaskarbute5421]

Sir is there any effect of underlying implant on recordings like in a case of fracture humerus with implant in situ

[@Efootballgoat777]

It's Contraindicated if patient have implant

[@indianplasticsurgeon2024]

Sir please upload in cleft palate as a short case...

[@GKHandSurgery]

Definitely! Thanks for the suggestion!

[@ritika3748]

Very informative video. Sir, could you please suggest what could be the positions of recording electrode on cortex while stimulating lower limbs and where the reference and ground electrode should be placed for ssep

[@GKHandSurgery]

When the median nerve is stimulated for SSEP monitoring, the cathode should be placed over the Median nerve, 2 cm proximal to the wrist crease. The anode should be placed 2-3 cm distal to the cathode or on the dorsal surface of the wrist. Neutral or grounding electrode is placed on the palmar surface of the forearm or a band electrode around the forearm should be used as the ground electrode. The recording electrodes are placed on the scalp over the underlying sensory cortex using bipolar “scalp-to-scalp” electrode.

[@JayaSurya-j6o]

CMAP is not Compound Motor action potential.

[@Dr-789]

If there is disease of spinal cord...and root is intact then we will get false negative result for root due to cord bad conduction... Is it ??

[@shreyasdurgannavar4030]

Sir diet changes required..???

[@GKHandSurgery]

No, diet changes are not required.

[@vigneshwar4365]

Sir , this video is awesome Maranda mass explanation sir For queries can I get ur mail ID for queries sir

[@GKHandSurgery]

Yes, sure! [e-mail]