What is Electromyography (EMG) and Nerve Conduction Studies (NCS)?

Electromyography and Nerve Conduction Studies, or EMG/NCS, is the recording of the electrical activity in the muscles and nerves. The study used small devices called electrodes to measure electrical signals transmitted by neurons. The electrodes are taped to the skin in order to gather recordings of the speed and strength of the signals as the muscles contract and relax.

Symptoms That May Require EMG/NCS

  • Numbness
  • Muscle Pain
  • Muscle Cramping
  • Limb Pain
  • Tingling
  • Muscle Weakness

Risks of EMG/NCS

  • Rare complications
  • Very low risk
  • Small risk of bleeding at needle injection site
  • Infection or nerve injury at needle injection site
  • Possible lung collapse with needle injection in muscle of the chest

Conditions diagnosed with Electromyography (EMG) and Nerve Conduction Studies (NCS)


Muscular Dystrophy is a genetic disease that causes muscular loss and weakness.

Polymyositis is an inflammatory disease that can cause painful swelling, tissue deterioration, and weakness.

Myasthenia Gravis is an autoimmune disease that causes muscular skeletal weakness.

Carpal Tunnel Syndrome is a condition that causes tingling and numbness in the hand and arm.

Peripheral Neuropathies is a condition caused by diabetes mellitus that damages the peripheral nerve.

Amyotrophic Lateral Sclerosis (ALS), also known as Lou Gehrig’s disease, is a neurological condition that affects physical function.

Poliomyelitis is a viral condition that causes paralysis and possibly death.

Degenerative Disc Disease is the slow deterioration of the spinal discs as the result of aging.

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