Morristown 973-455-7444
Comprehensive Neurology of New Jersey

Electomyography (EMG) Testing

What is an EMG?

Electromyography (EMG) is a diagnostic procedure used to help evaluate the integrity and health of muscles and the nerves (motor neurons) traveling to the muscles. The motor neurons carry electrical impulses to cause muscles to contract. The EMG helps gather this information and convert it into sound, which can be graphed and eventually interpreted by a specialist. It uses needle electrodes which transmit the electrical impulses once inserted directly into the muscle and then records activity from the muscle onto graphs. A nerve conduction study (NCS), is another integral part of an EMG or electrodiagnostic testing, which utilizes surface electrodes taped to the skin surface along various areas of the arms and legs to help measure the speed and amount of the nerve conducting. EMG/NCS results can reveal both nerve and muscle dysfunction or even the intricate network between nerve and muscle. Electrodiagnostic testing may include EMG and Nerve Conduction Studies, (NCS). Further testing may include, CT Scans, MRI, Lumbar punctures, and Skin biopsies.

Doctors may recommend EMG when patients experience symptoms such as: numbness, tingling, burning, pain, muscle spasm, weakness leading to functional loss

Do I Need an EMG?

Electrodiagnostic evaluation is used to assist in the diagnosis of medical conditions that affect nerve and muscle function. Common examples include:

  • Pinched nerves in neck and lower back
  • Carpal tunnel syndrome
  • Ulnar nerve compression at elbow
  • Muscle and nerve injuries in arms and legs
  • Peripheral neuropathy (ex: Diabetes)
  • Myopathy (ex: Polymyositis)
  • Neuromuscular Transmission Conditions 
    (ex: Myasthenia Gravis)
  • Neuromuscular Disorders 
    (ex: Amyotrophic Lateral Sclerosis - ALS)

EMG tests are performed personally by Dr. Morse. Patients may expect to feel only mild discomfort, typically described as a small pinch or sting. NCS tests are often compared to experiencing the sensation of strong static electricity. These procedures are proven, safe, non-invasive, and offer no side effects. All testing and evaluation is conducted in our comfortable and convenient Morristown office.