locus ceruleus


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
Related to locus ceruleus: Raphe nuclei

locus

 [lo´kus] (L.)
1. a place or site.
2. in genetics, the specific site of a gene on a chromosome.
locus ceru´leus a pigmented eminence in the superior angle of the floor of the fourth ventricle of the brain.
locus of control a belief regarding responsibility for actions. Individuals with an internal locus of control generally hold themselves responsible for actions and consequences, while those with an external locus of control tend to believe that they are not able to affect a personal outcome and that luck or destiny are responsible for their actions.

locus ceruleus

Etymology: L, locus, place, caeruleus, sky-blue
a deeply pigmented group of several thousand neurons in the floor of the fourth ventricle. It is part of a major norepinephrine pathway of the central nervous system.

Locus ceruleus

Brain region that processes sensory signals from all areas of the body.

locus

pl. loci [L.] place; site; in genetics, the specific site of a gene on a chromosome.

locus ceruleus
a pigmented eminence in the superior angle of the floor of the fourth ventricle of the brain.
References in periodicals archive ?
The primate locus ceruleus and effects of clonidine on opiate withdrawal.
The picture of melancholic depression espoused by Gold and his colleagues is that the locus ceruleus and CRH systems, once activated, reinforce each other and activate the stress-response system.
Descending projections of the raphe nuclei are small and include projections to the locus ceruleus, while ascending connections of the raphe nuclei include the hippocampus.
The hypothalamus plays a role in the onset and maintenance of sleep while the locus ceruleus and the dorsal raphe nucleus play a role in the onset and maintenance of REM sleep.
Bloom has traced this postwithdrawal change to another set of brain cells, the locus ceruleus.