amyotrophic lateral sclerosis

Science Dictionary
amyotrophic lateral sclerosis   (ā'mī-ə-trō'fĭk, -ə-trŏf'ĭk, ā-mī'-)  Pronunciation Key 
A chronic, progressive neurologic disease marked by gradual degeneration of the neurons in the spinal cord that control voluntary muscle movement. The disorder causes muscle weakness and atrophy and usually results in death. Also called Lou Gehrig's disease, after the American baseball player (1903-41) who was the first public figure to suffer from the disease.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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