Electromyography

Electromyography (EMG) is a diagnostic procedure used in medical practice to evaluate and record the electrical activity produced by skeletal muscles. This technology plays a significant role in detecting neuromuscular diseases, assessing muscle performance, and helping design rehabilitative therapies.

EMG - SIMI

Introduction

Electromyography provides a way to measure the electrical signals that muscles produce when they are at rest and when they contract. It can provide valuable data for diagnosing a variety of disorders affecting muscles or nerves.^[1]

Procedure

During an EMG, fine needles or electrodes are inserted into a muscle to record electrical activity. The procedure can cause minor discomfort or pain. The electrodes detect the electrical signals your muscles send when at rest and when contracted. These signals are amplified and appear on a device called an oscilloscope in the form of waves. They are also heard on a speaker as crackling sounds when the muscle contracts.^[2]

Types of Electromyography

There are two primary types of EMG:
Surface EMG: This non-invasive technique uses electrodes placed on the skin over the muscle being tested.
Intramuscular EMG: This involves inserting a needle electrode through the skin into the muscle tissue.^[3]

Clinical Applications

EMG is used in the diagnosis of various neuromuscular disorders, such as:
Neuromuscular diseases: Including amyotrophic lateral sclerosis (ALS), myasthenia gravis, and Guillain-Barré syndrome.
Peripheral nerve injuries: Including carpal tunnel syndrome or peripheral neuropathy.
Muscular disorders: Including muscular dystrophy or polymyositis.^[4]

Risks and Contraindications

While EMG is a relatively safe procedure, it may cause temporary discomfort or pain. Rarely, minor bleeding can occur at the needle insertion sites. Individuals with bleeding disorders or those taking anticoagulant medication should be evaluated carefully before undergoing an EMG.^[5]

References

↑ Preston, D. C., & Shapiro, B. E. (2013). Electromyography and Neuromuscular Disorders. Elsevier Health Sciences.
↑ Boon, A. J., Smith, J., & Harper, C. M. Jr. (2008). Needle electromyography. In Physical Medicine and Rehabilitation Clinics of North America, 19(2), 361-78.
↑ Merletti, R., & Parker, P. A. (2004). Electromyography: Physiology, Engineering, and Non-Invasive Applications. Wiley-IEEE Press.
↑ Dillingham, T. R., & Chen, S. (2020). Electromyography in Neuromuscular Disorders. In Physical Medicine and Rehabilitation Clinics of North America, 31(1), 1-12.
↑ Al-Lozi, M. T., Pestronk, A., & Yee, W. C. (1998). Routine nerve conduction studies and electromyography in patients on anticoagulants. Muscle & Nerve, 21(11), 1528-1530.

This article is a medical stub. You can help WikiMD by expanding it!
Most recent articles Ongoing trials	Wikipedia

Navigation: Wellness - Encyclopedia - Health topics - Disease Index‏‎ - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes

Transform your life with W8MD's budget GLP-1 injections from $125.

W8MD offers a medical weight loss program to lose weight in Philadelphia. Our physician-supervised medical weight loss provides:

- Weight loss injections in NYC (generic and brand names):
- Zepbound / Mounjaro, Wegovy / Ozempic, Saxenda
Most insurances accepted or discounted self-pay rates. We will obtain insurance prior authorizations if needed.
- Generic GLP1 weight loss injections from $125 for the starting dose.
Also offer prescription weight loss medications including Phentermine, Qsymia, Diethylpropion, Contrave etc.

NYC weight loss doctor appointments

Start your NYC weight loss journey today at our NYC medical weight loss and Philadelphia medical weight loss clinics.

Call 718-946-5500 to lose weight in NYC or for medical weight loss in Philadelphia 215-676-2334.
Tags:NYC medical weight loss, Philadelphia lose weight Zepbound NYC, Budget GLP1 weight loss injections, Wegovy Philadelphia, Wegovy NYC, Philadelphia medical weight loss, Brookly weight loss and Wegovy NYC

Advertise on WikiMD

WikiMD's Wellness Encyclopedia

Let Food Be Thy Medicine
Medicine Thy Food - Hippocrates

Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.

[1] Preston, D. C., & Shapiro, B. E. (2013). Electromyography and Neuromuscular Disorders. Elsevier Health Sciences.

[2] Boon, A. J., Smith, J., & Harper, C. M. Jr. (2008). Needle electromyography. In Physical Medicine and Rehabilitation Clinics of North America, 19(2), 361-78.

[3] Merletti, R., & Parker, P. A. (2004). Electromyography: Physiology, Engineering, and Non-Invasive Applications. Wiley-IEEE Press.

[4] Dillingham, T. R., & Chen, S. (2020). Electromyography in Neuromuscular Disorders. In Physical Medicine and Rehabilitation Clinics of North America, 31(1), 1-12.

[5] Al-Lozi, M. T., Pestronk, A., & Yee, W. C. (1998). Routine nerve conduction studies and electromyography in patients on anticoagulants. Muscle & Nerve, 21(11), 1528-1530.

[1]

[2]

[3]

[4]

[5]