motor neuron disease

any one of a group of degenerative disorders of the lower motor neurons or both the lower and upper motor neurons, marked by progressive weakness and wasting of skeletal muscles and paralysis. This group of disorders includes several forms, but—especially in the United States—the term often is applied specifically to amyotrophic lateral sclerosis.

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Psychology term of the day

January 28th 2025

institutionalism

n. see social breakdown syndrome.