Area postrema

Area postrema

Infobox Brain
Name = PAGENAME
Latin =
GraySubject = 187
GrayPage = 800


Caption = Rhomboid fossa. (Area postrema labeled at bottom center.)


Caption2 =
IsPartOf =
Components =
Artery =
Vein =
Acronym = AP
BrainInfoType = hier
BrainInfoNumber = 769
MeshName = Area+postrema
MeshNumber = A08.186.211.132.810.406.286
DorlandsPre =
DorlandsSuf =
The area postrema is a part of the brain that controls vomiting. It was discovered in 1953 by Utah Pharmacologists Herbert L. Borison and S. C. Wang [http://www.time.com/time/magazine/article/0,9171,861927,00.html] .

Location

It is located in the lateral reticular formation of the medulla oblongata. More specifically, it is located between the funiculus separans (a narrow translucent ridge cossing the ala cinerea) and the clava, as a small tongue-shaped area. Morphine directly stimulates the area postrema that causes vomiting.

Function

The area postrema, one of the circumventricular organs, detects toxins in the blood and acts as a vomit inducing center. It connects to the Nucleus of the Solitary Tract and other autonomic control centres in the brainstem. It is thus excited by visceral afferent impulses (sympathetic and vagal) arising from the gastrointestinal tract and other peripheral trigger areas.

External links

* [http://www.endotext.org/neuroendo/neuroendo3b/neuroendo3b_3.htm Diagram at endotext.org]
* [http://cal.vet.upenn.edu/neuro/server/slides/ns_021-AP.jpgSlide at upenn.edu]


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Look at other dictionaries:

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  • Area postrema — L area postrema est une structure médullaire du cerveau qui contrôle le vomissement[1] Notes et références ↑ L area postrema est située au niveau du nu …   Wikipédia en Français

  • Area postrema — galinis laukelis statusas T sritis centrinė nervų sistema atitikmenys: lot. Area postrema ryšiai: platesnis terminas – pailgųjų smegenų pjūviai …   Paukščių anatomijos terminai

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  • area postrema — area po·stre·ma pō strē mə, päs trē n a tongue shaped structure in the caudal region of the fourth ventricle of the brain * * * a small tongue shaped area on the lateral wall of the fourth ventricle, between the funiculus separans and the… …   Medical dictionary

  • postrema — see AREA POSTREMA …   Medical dictionary

  • area — 1. [TA] Any circumscribed surface or space. 2. All of the part supplied by a given artery or nerve. 3. A part of an organ having a special function, as the motor a. of the brain. SEE ALSO …   Medical dictionary

  • самое заднее поле — (area postrema, PNA, JNA) участок ромбовидной ямки, расположенный кзади и латерально от треугольника блуждающего нерва; в пределах поля частично проецируются ядра блуждающего нерва …   Большой медицинский словарь

  • Са́мое за́днее по́ле — (area postrema, PNA, JNA) участок ромбовидной ямки, расположенный кзади и латерально от треугольника блуждающего нерва; в пределах поля частично проецируются ядра блуждающего нерва …   Медицинская энциклопедия

  • Dopamin-Rezeptoren — Nervenzelle mit rot gefärbten Dopamin Rezeptoren Der Dopamin Rezeptor ist die Empfangseinheit für Signale durch den Neurotransmitter Dopamin. Der Rezeptor sitzt auf der Zelloberfläche unter anderem von speziellen Neuronen und von speziellen… …   Deutsch Wikipedia

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