Third ventricle

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
BrainInfoNumber = 429
MeshName =
MeshNumber =
DorlandsPre = v_06
DorlandsSuf = 12853453
The third ventricle ("ventriculus tertius") is one of four connected fluid-filled cavities comprising the ventricular system within the human brain. It is a median cleft between the two thalami, and is filled with cerebrospinal fluid (CSF).

It is in the midline, between the left and right lateral ventricles.

Communication

It communicates with the lateral ventricles anteriorly by the interventricular foramina (of Monro).

It communicates with the fourth ventricle posteriorly by the cerebral aqueduct (of Sylvius).

Development

Developmentally the third ventricle represents the cavity of the diencephalon.

Boundaries

It is bounded by the thalamus and hypothalamus on both the left and right sides. The lamina terminalis forms the anterior wall of the third ventricle.

Protrusions

There are two protrusions on the front of the third ventricle:
* the supra-optic recess (above the optic chiasma)
* the infundibular recess (above the pituitary stalk).

In casts of the ventricular system, a small 'hole' may be seen in the body of the third ventricle. This is formed where the two thalami are joined together at the interthalamic adhesion (not seen in all people).

ee also

*Suprapineal recess


=Additional

External links

*


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Look at other dictionaries:

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  • 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

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  • roof of third ventricle — the tela choroidea ventriculi tertii and the ependyma, which form the superior covering structures of the third ventricle …   Medical dictionary

  • Ventricle — A ventricle is a chamber of an organ. For example, the four connected cavities (hollow spaces) in the central portion of the brain and the lower two chambers of the heart are called ventricles. * * * A normal cavity, as of the brain or heart. SYN …   Medical dictionary

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