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biological

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amyotrophic lateral sclerosis

amyotrophic lateral sclerosis Amyotrophic lateral sclerosis is a degenerative disease of the motor neurons in the brain, brain stem, and spinal cord.

Amyotrophic lateral sclerosis is a degenerative disease of the motor neurons in the brain, brain stem, and spinal cord. It usually begins after age 50 and causes steadily worsening muscle weakness and wasting, problems with speech and swallowing, abnormal reflexes and muscle twitching, and eventually paralysis of breathing.