The degeneration and death of motor neurons in the spinal cord and brain results in amyotrophic lateral sclerosis (ALS). These neurons convey electrical messages from the brain to the muscles to stimulate movement in the arms, legs, trunk, neck, and head. As motor neurons degenerate, the muscles are weakened and cannot move as effectively, leading to muscle wasting. (Gale Group.)
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- Amyotrophic Lateral Sclerosis