Electromyography (EMG) & Nerve Conduction Studies (NCS)

In doctor, Electromyography, EMG & NCS, Medical, Nerve Conduction Studies, Physiatrist, Physical Medicine and Rehabilitation on April 16, 2011 at 1:21 am

Electromyography (EMG) & Nerve Conduction Studies (NCS): a test that helps in diagnosis of conditions related to nerves, muscles, neuromuscular junction and motor neuron.

General Indications for EMG & NCS:
numbness, tingling, burning sensation or
pain, radicular pain, limb pain, muscle
weakness and/or atrophy, fasciculations.

  • Facial nerve palsy
  • Carpal & Cubital tunnel syndrome
  • Tarsal tunnel syndrome
  • Nerve Injuries
  • Peripheral neuropathy
  • Radiculopathies
  • Congenital and acquired neuropathies
  • Myopathies, muscular dystrophy
  • Neuromuscular junction disorders
  • Motor neuron diseases

The EMG & NCS usually takes about 1 hour to be performed and the report is provided to the referring physician or provider in 24 to 48 hours.

BOTOX injections are performed either EMG or nerve stimulation guided. The botulinum toxin when injected relaxes the muscle to reduce muscle tone and spasticity, improve function of the extremity or neck and decrease pain. The benefit of the BOTOX injection usually last up to 4-5 months depending on the condition treated and is found to be beneficial is repeated.

Special considerations:
EMGs are often avoided or done with great caution on individuals who are receiving anticoagulants (warfarin) due to risk of local bleeding. Depending on each individual case your doctor may stop the warfarin 3 days before the study and re-assume immediately after.

EMGs are generally not problematic for persons with pacemakers, but nerve conduction studies requiring stimulation near pacemakers should be avoided.

Do not apply body or hand lotion, this will make difficult for the superficial electrodes to adhere to the skin.

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