- opening). The third ventricle is a median (midline) cavity in the brain that is bounded by the thalamus and hypothalamus on either side. Anteriorly (in front) the third ventricle communicates with the lateral ventricles and posteriorly (in back) the third ventricle communicates with what is called the aqueduct of the midbrain (or the aqueduct of Sylvius). The fourth ventricle is the most inferior (lowest) of the four ventricles of the brain. It extends from the aqueduct of the midbrain to the central canal of the upper end of the spinal cord with which it communicates by the two foramina (openings) of Luschka and the foramen (opening) of Magendie. The ventricles are filled with cerebrospinal fluid, which is formed by structures called choroid plexuses located in the walls and roofs of the ventricles.
* * *third ventricle n the median unpaired ventricle of the brain bounded by parts of the telencephalon and diencephalon
Medical dictionary. 2011.
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third ventricle — n. one of the four cavities of the brain, lying on the midline between the cerebral hemispheres * * * … Universalium
third ventricle — n. one of the four cavities of the brain, lying on the midline between the cerebral hemispheres … English World dictionary
Third ventricle — Infobox Brain Name = PAGENAME Latin = ventriculus tertius cerebri GraySubject = GrayPage = Caption = Scheme showing relations of the ventricles to the surface of the brain. Caption2 = IsPartOf = Components = Artery = Vein = BrainInfoType = hier… … Wikipedia
third ventricle — noun a narrow ventricle in the midplane below the corpus callosum; communicates with the fourth ventricle via the Sylvian aqueduct • Hypernyms: ↑ventricle … Useful english dictionary
third ventricle — noun Date: 1615 the median unpaired ventricle of the brain bounded by parts of the telencephalon and diencephalon … New Collegiate Dictionary
third ventricle of brain — third cerebral ventricle ventriculus tertius cerebri … Medical dictionary
Tela chorioidea of the third ventricle — Infobox Brain Name = PAGENAME Latin = tela choroidea ventriculi tertii GraySubject = 189 GrayPage = 841 Caption = Coronal section of lateral and third ventricles. (Tela chorioidea labeled at left.) Caption2 = IsPartOf = Components = Artery = Vein … Wikipedia
floor of third ventricle — the inferior interior surface of the third ventricle, formed by the optic chiasm, the tuber cinereum, the infundibulum, the mammillary bodies, and the posterior perforated substance … Medical dictionary
roof of third ventricle — the tela choroidea ventriculi tertii and the ependyma, which form the superior covering structures of the third ventricle … Medical dictionary
choroid plexus of third ventricle — p. choroideus ventriculi tertii … Medical dictionary