abiotrophy

n. loss of function or loss of resistance to a disease through degeneration or failure of body tissues, organs, or systems. Abiotrophy is used particularly to refer to premature degeneration caused by a genetic defect, as in Huntington’s disease. —abiotrophic adj.

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Psychology term of the day

December 26th 2024

descending tract

a bundle of nerve fibers that carries motor impulses from the brain to the spinal cord. There are three major descending tracts: the corticospinal tract, vestibulospinal tract, and reticulospinal tract. Also called descending pathway. Compare ascending tract.