Amyotrophic Lateral Sclerosis

**Semantic type:** Disease or Syndrome

**Definition:** A neurodegenerative disorder characterized by progressive degeneration of the motor neurons of the central nervous system. It results in weakness and atrophy of the muscles which leads to an inability to initiate and control voluntary movements.

**Synonyms:** - ALS - Amyotrophic lateral sclerosis - Lou Gehrig Disease