Each muscle fiber that contracts will produce an action potential and the size of the muscle fiber affects the rate (how frequently an action potential occurs) and size (amplitude) of the action potential(s).Īn EMG may be used to evaluate a variety of problems, including the following:.The presence, size, and shape of the wave form produced on the oscilloscope (the action potential) provide information about the ability of the muscle to respond to nervous stimulation.Electromyogram (EMG) Nerve Conduction Study(NCS) Electroencephalogram (EEG) Spinal Tap/ Lumbar PunctureĪn EMG, used in conjunction with a neurological examination, helps establish a diagnosis and the extent of a problem by measuring the electrical activity of a muscle in response to stimulation.Īn EMG is done by inserting electrodes in fine needles into the muscles being tested, and by placing electrodes on the skin over peripheral nerves. These diagnostic procedures will be done in office by our neurologists.
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