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circumventricular

    0.01 sec.
circumventricular [ser″kum-ven-trik´u-ler]
located around a ventricle, particularly in the brain.


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HIV and AIDS: The Circumventricular Organs (CVOs) are small brain regions in the walls of the 3rd and 4th Ventricles.
Particular attention should be paid to lesions in circumventricular organs and the optic nerve head, since in both regions the blood-brain barrier is less tight than in other regions of the CNS, and AQP-4 is highly expressed at these sites.
However, structures such as the area postrema, median eminence, portions of the hypothalamus, and other circumventricular organs that lie outside the blood-brain barrier play an integral role in the vomiting reflex.
 
 
 
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