Locus

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Related to Locus coeruleus: 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 ?
2010, Paroxetine-induced increase in activity of locus coeruleus neurons in adolescent rats : implication of a countertherapeutic effect of an antidepressant, Neuropsychopharmacology, 35, 8, 1653-63.
Tableau 1 Quatre principaux neuromodulateurs ascendants, leurs origines et leurs principales cibles Neuromodulateur Origine de la Cibles principales projection Dopamine (DA) Pars compacta de la Striatum dorsal substance noire, aire Striatum ventral tegmentale ventrale Cortex frontal Serotonine (5HT) Noyau du raphe dorsal, Cortex, striatum, noyau du raphe median cervelet Hippocampe Noradrenaline (NA) Locus coeruleus Cortex, hippocampe, cervelet Acetylcholine (ACh) Noyau basal de Meynert Cortex, amygdale Septum median Noyau Hippocampe Pars tegmental compacta de la pedonculopontin substance noire, thalamus Colliculus superieur
The locus coeruleus in schizophrenia: a postmortem study of noradrenergic neurones.
Locus coeruleus neurofibrillary degeneration in aging, mild cognitive impairment and early Alzheimer's disease.
Locus Coeruleus neurons: cessation of activity during cataplexy.
Effects of local injection of the alpha 2-adrenergic agonist clonidine into the locus coeruleus complex on the gain of vestibulospinal and cervicospinal reflexes in decerebrate cats.
Role of locus coeruleus in attention and behavioural flexibility.
Noradrenergic mediation of the memory-enhancing effect of corticotropin-releasing factor in the locus coeruleus.
The reasoning behind instituting this therapy was to enhance the activity of the locus coeruleus (A6)-NA neurons and DR-5HT neurons and (A10)-DA neurons.
In order to suppress oxidation of lipids and protect the locus coeruleus, 600 mg of alpha-lipoic acid was added per day.
What is unique about the locus coeruleus is that it activates almost all higher-order brain centers that are involved in complex cognitive tasks," said Mehler.
Organizationally, the cell bodies of norepinephrine neurons are found in the brain stem at the level of the locus coeruleus.