Understanding Electromyography (EMG) and Nerve Testing

Electromyography (EMG) and nerve conduction studies (NCS)–also called a nerve conduction velocity test (NCV)–are invaluable diagnostic tools used in neurology to assess and diagnose a wide range of neuromuscular conditions.

  • Electromyography (EMG): EMG measures the electrical activity in muscles. Thin needles are inserted into specific muscles, and the resulting electrical signals are recorded. This test helps identify muscle and nerve disorders, such as muscle dystrophy, myasthenia gravis, and amyotrophic lateral sclerosis (ALS).
  • Nerve Conduction Studies (NCS): NCS measures how well nerves transmit electrical signals. Electrodes are placed on the skin, and a small electrical pulse is applied to stimulate the nerve. This measures the speed and strength of the nerve’s response. NCS is crucial in diagnosing conditions like carpal tunnel syndrome, diabetic neuropathy, and peripheral nerve injuries.

Both tests are minimally invasive, involving the placement of electrodes or needles. While some discomfort may be experienced, they are generally well-tolerated. The results provide valuable insights for neurologists to develop tailored treatment plans.


EMG and nerve testing can help neurologists in the following ways:

  • Pinpointing Nerve Damage: EMG and NCS help locate nerve damage, determine its extent, and differentiate between nerve and muscle problems.
  • Identifying Underlying Conditions: These tests aid in diagnosing neurological conditions, ensuring timely and accurate treatment.
  • Assessing Disease Progression: EMG can track the progression of conditions like ALS, helping with treatment planning and monitoring.

EMG and NCS are essential tools to help our specialists accurately diagnose disorders and guide treatment decisions to improve patients’ overall quality of life. If you have additional questions about these tests, don’t hesitate to contact us. We will be happy to provide further information.

Education Center

Understanding Dementia
and Memory Problems

Understanding Epilepsy, Seizures,
and EEG Testing


Understanding Movement Disorders:
Parkinson's Disease, Tremor, and Restless Legs Syndrome (RLS)

Understanding Multiple Sclerosis (MS) and Neuromyelitis Optica (NMO)

Understanding Nerve and
Muscle Disorders: Neuropathy


Botox for Migraine,
Cervical Dystonia, and Spasticity

Understanding Electromyography (EMG)
and Nerve Testing

Understanding Cognitive


Bottom Contact