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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.

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Psychology term of the day

November 16th 2024

self-affirmation theory

self-affirmation theory

the concept that people are motivated to maintain views of themselves as well adapted, moral, competent, stable, and able to control important outcomes. When some aspect of this self-view is challenged, people experience psychological discomfort. They may attempt to reduce this discomfort by directly resolving the inconsistency between the new information and the self, by affirming some other aspect of the self, or both. Self-affirmation theory has been used as an alternative to cognitive dissonance theory for explaining some phenomena. See also dissonance reduction; self-consistency perspective. [originally proposed by U.S. psychologist Claude M. Steele (1946–  )]