Electromyography/Nerve Conduction Study (EMG/NCV)

Electromyography/Nerve Conduction Study (EMG/NCV)

Definition

An Electromyography (EMG) and Nerve Conduction Study (NCV) are complementary electro diagnostic tests that work in combination to measure the electrical activity in nerves and muscles. Results are used to detect, process, and record electrical muscle activity in order to aid in the diagnosis of neuromuscular disease.

EMG can help diagnose many muscle and nerve disorders, including:

  • muscular dystrophy
  • congenital, mitochondrial, and metabolic myopathies
  • myotonias
  • compression neuropathies, such as carpal tunnel syndrome
  • peripheral neuropathies
  • radiculopathies
  • nerve lesions
  • amyotrophic lateral sclerosis (Lou Gehrig's disease)
  • polio
  • spinal muscular atrophy
  • Guillain-BarrĂ© syndrome
  • ataxias
  • myasthenias

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