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N C S  /  E M G

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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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Impulses inspect your nerves to check for any "roadblocks"

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

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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