Amyotrophic Lateral Sclerosis - Diagnosis

The diagnosis of ALS begins with a complete medical history, physical examination, and neurological (nervous system) examination. An electromyogram (EMG; pronounced ih-LECK-tro-my-oh-gram) is part of the neurological exam. An EMG measures muscle function and tells how much damage has already occurred in motor neurons. A variety of blood and urine tests, X rays, and brain scans may also be conducted to rule out diseases other than ALS. ALS is rarely misdiagnosed after a review of all these factors.

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