Locus

(redirected from Locus ceruleus)
Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.
Related to Locus ceruleus: Raphe nuclei

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

Locus

 

a linear section of a chromosome occupied by a gene.

Using genetic and cytological methods, it is possible to determine the location of a gene, that is, to find which chromosome contains the given gene and its locus, or position in relation to other genes on the same chromosome. It has been demonstrated in some microorganisms that genes that control a particular sequence of biochemical reactions are found in neighboring loci, which are arranged in the same order as the order in which the reactions occur. This has not been established for higher organisms. The term “locus” is sometimes used in the literature as a synonym for the terms “gene” and “cistron.”

locus

[′lō·kəs]
(genetics)
The fixed position of a gene in a chromosome, occupied by allele.
(mathematics)
A collection of points in a Euclidean space whose coordinates satisfy one or more algebraic conditions.

Locus

A distributed system project supporting transparent access to data through a network-wide file system.
References in periodicals archive ?
In stress, the locus ceruleus fires more rapidly and delivers the arousal-producing neurotransmitter norepinephrine to many diverse regions in the brain.
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.
Puesto que el sueno no REM origina un descenso en la pendiente y un desplazamiento a la derecha de 3-5 mmHg de la curva de respuesta ventilatoria hipercapnica, los efectos sobre la respiracion son explicados por el estado de sueno inducido por dexmedetomidina al actuar sobre el locus ceruleus mas que a nivel bulbar.
The locus ceruleus and the raphe nuclei appear to have modulatory influences on the activity of the cerebral cortex.
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.
Su accion antinociceptiva se debe al estimulo de receptores Alfa-2A en la medula espinal o en el locus ceruleus.
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.