单词	substantia nigra
释义	substantia nigra noun sub·​stan·​tia ni·​gra səb-ˌstan(t)-shē-ə-ˈnī-grə  -ˈni- plural substantiae nigrae səb-ˌstan(t)-chē-ˌē-ˈnī-(ˌ)grē  -ˈni- : a layer of deeply pigmented gray matter situated in the midbrain and containing the cell bodies of a tract of dopamine-producing nerve cells whose secretion tends to be deficient in Parkinson's disease Example Sentences Recent Examples on the Web In both situations, the neurons in the midbrain's substantia nigra and ventral tegmental area flared up in response to the images. Rasha Aridi, Smithsonian Magazine, 24 Nov. 2020 As predicted, the area of the brain impacted—the substantia nigra—was the same when the subject was derived of food and derived of human contact. Katherine Dunn, Fortune, 24 Nov. 2020 In 2016, Barrett reported that meaningful musical cues changed the activity of the substantia nigra, a reward processing center that makes the happy hormone dopamine. Popular Science, 8 Apr. 2020 Word History Etymology New Latin, literally, black substance First Known Use 1809, in the meaning defined above Medical Definition substantia nigra noun sub·​stan·​tia ni·​gra səb-ˌstan-chē-ə-ˈnī-grə  -ˈnig-rə  plural substantiae nigrae -chē-ˌē-ˈnī-(ˌ)grē  -ˈnig-(ˌ)rē  : a layer of deeply pigmented gray matter situated in the midbrain and containing the cell bodies of a tract of dopamine-producing nerve cells whose secretion tends to be deficient in Parkinson's disease
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