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locus |
Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia, Hutchinson | 0.06 sec. |
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locus 1. (in many legal phrases) a place or area, esp the place where something occurred 2. Maths a set of points whose location satisfies or is determined by one or more specified conditions 3. Genetics the position of a particular gene on a chromosome
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It especially affects two brain regions: the cerebral cortex--involved in mood, cognition, and perception--and the locus ceruleus, which receives sensory signals. In stress, the locus ceruleus fires more rapidly and delivers the arousal-producing neurotransmitter norepinephrine to many diverse regions in the brain. Although the pigmented locus ceruleus region of the brain also contains neuromelanin, it is largely immune to the cell-destroying effects of low doses of MPTP. |
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