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N C S  /  E M G

Impulses inspect your nerves to check for any "roadblocks"

Pin electrodes go into your muscles and read what your muscles are "saying"

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A Nerve Conduction Study (NCS), a precursor to an EMG, uses electrode stickers applied to the skin (surface electrodes) to measure the speed and strength of signals traveling between two or more points.
 

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Electromyography (EMG) is a routine diagnostic procedure to assess the health of muscles and the nerve cells that control them (motor neurons). EMG results can reveal nerve dysfunction, muscle dysfunction or problems with nerve-to-muscle signal transmission.  Motor neurons transmit electrical signals that cause muscles to contract.

 

An EMG uses a thin, pin electrode inserted directly into a muscle to record the electrical activity and behavior. Using specialized software, these signals are translated into sounds, numerical values, and graphs that are then interpreted by a specialist.

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Why is it Done?


Your doctor may order an EMG if you have signs or symptoms that may indicate a nerve or muscle disorder. Such symptoms may include:

  • Tingling

  • Numbness

  • Muscle weakness

  • Muscle pain or cramping

  • Certain types of limb pain
     

EMG results are often necessary to help diagnose or rule out a number of conditions such as:

  • Muscle disorders, such as muscular dystrophy or polymyositis

  • Diseases affecting the connection between the nerve and the muscle, such as myasthenia gravis

  • Disorders of nerves outside the spinal cord (peripheral nerves), such as carpal tunnel syndrome or peripheral neuropathies

  • Disorders that affect the motor neurons in the brain or spinal cord, such as amyotrophic lateral sclerosis or polio

  • Disorders that affect the nerve root, such as a herniated disk in the spine

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