From a test that lasts an average of 40-minutes, patients with nerve injuries or neuro-muscular conditions can learn a lot about the health of the nerves signaling messages to muscles. The test is called an electromyography, or EMG.  Neurologist Dr. Derrick Fox of MedStar Health explains why the test is useful, who should be tested, what information is gleaned from it, how it is conducted, and more....

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