locus ceruleus


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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 ?
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.
These systems include the ANS, limbic system, basal ganglia and two extrathalamic cortical modulatory systems, the raphe nuclei and locus ceruleus.
Norepinephrine is the primary neurotransmitter for postganglionic sympathetic neurons and for projecting pathways from the locus ceruleus to the cerebral cortex, spinal cord and cerebellum.
At the instinctual level the amgydala picks up the stimulus, perceives it as a stressor and then triggers the extrathalamic modulatory systems, including the locus ceruleus and the raphe nuclei, to enhance the selectivity and magnitude of the cortical neural response to primary afferent information.
In addition to stimulating the pituitary, PVN axons also extensively ramify to the autonomic nervous system, specifically the locus ceruleus (LC), which has CRF receptors.
Its anti-nociceptive action is due to the stimulus of the Alpha-2A receptors in the spinal cord or in the locus ceruleus.
When the locus ceruleus is activated, cerebral blood vessels constrict.
The dorsal raphe nuclei along with the locus ceruleus make up part of the central antinociceptive (anti-pain) network.
The locus ceruleus offers a tempting explanation of the clumsiness of an intoxicated person.