Organum vasculosum of lamina terminalis
- Organum vasculosum of lamina terminalis
-
The organum vasculosum of the lamina terminalis (OVLT) (or supraoptic crest) is one of the circumventricular organs of the brain. Other circumventricular organs are the subfornical organ (SFO) and the area postrema in the brainstem.
AV3V region
The OVLT and the SFO are both strongly interconnected with the median preoptic nucleus of the hypothalamus (the nucleus medianus), and together these three structures comprise the so called "AV3V" region - the region anterior and ventral to the third ventricle. The AV3V region is very important in the regulation of fluid and electrolyte balance by controlling thirst, sodium excretion, blood volume regulation, and vasopressin secretion.
Function
The OVLT is outside the blood brain barrier, and so neurons in this region can respond to factors that are present in the systemic circulation.
Some neurons in the OVLT are osmoreceptors, being sensitive to the osmotic pressure of the blood. These neurons project to the supraoptic nucleus and paraventricular nucleus to regulate the activity of vasopressin-secreting neurons. These neurons also project to the nucleus medianus (also called the medial preoptic nucleus) which is involved in controlling thirst.
See also
External links
Wikimedia Foundation.
2010.
Look at other dictionaries:
vascular organ of lamina terminalis — organum vasculosum of lamina terminalis … Medical dictionary
Organum vasculosum of the lamina terminalis — Infobox Brain Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Caption2 = IsPartOf = Components = Artery = Vein = BrainInfoType = hier BrainInfoNumber = 366 MeshName = MeshNumber = DorlandsPre = o 06 DorlandsSuf = 12596306 The organum… … Wikipedia
Organum vasculosum laminae terminalis — Das Organum vasculosum laminae terminalis (OVLT) ist ein zirkumventrikuläres Organ. Es liegt rostral des Hypothalamus und ist ein Teil der Lamina terminalis. Funktion Die Funktion des OVLT ist noch nicht vollständig aufgeklärt. Man nimmt an, dass … Deutsch Wikipedia
Lamina terminalis — Infobox Brain Name = PAGENAME Latin = GraySubject = 184 GrayPage = 742 Caption = Median sagittal section of brain of human embryo of three months. (Lamina terminalis labeled at center left.) Caption2 = Median sagittal section of brain of human… … Wikipedia
Lamina terminalis — Die Lamina terminalis ist eine Gewebestruktur im Gehirn. Sie ist unpaarig und entwickelt sich aus dem Prosencephalon. Sie bildet die Vorderwand des dritten Hirnventrikels und enthält das Organum vasculosum laminae terminalis. Quellen Anatomie… … Deutsch Wikipedia
organum vasculosum laminae terminalis — [TA] vascular organ of lamina terminalis: an area of the lamina terminalis where many neurons pass through a double layered capillary bed and the blood brain barrier is modified; it has a superficial capillary layer that receives blood from… … Medical dictionary
organum — SYN: organ, organ. [L. tool, instrument] o. auditus archaic term for vestibulocochlear organ. organa genitalia [TA] SYN: genitalia. organa genitalia feminina externa SYN … Medical dictionary
organ — Any part of the body exercising a specific function, as of respiration, secretion, or digestion. SYN: organum [TA], organon. [L. organum, fr. G. organon, a tool, instrument] accessory organs 1. SYN … Medical dictionary
Fluid balance — is the concept of human homeostasis that the amount of fluid lost from the body is equal to the amount of fluid taken in. Euvolemia is the state of normal body fluid volume.Water is necessary for all life on Earth. Humans can survive for several… … Wikipedia
OVLT — organum vasculosum of the lamina terminalis … Medical dictionary
