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Definition of Third ventricle
1. Noun. A narrow ventricle in the midplane below the corpus callosum; communicates with the fourth ventricle via the Sylvian aqueduct.
Medical Definition of Third ventricle
1. A narrow, vertically oriented, irregularly quadrilateral cavity in the midplane, extending from the lamina terminalis to the rostral opening of the mesencephalic aqueduct. This ventricle communicates at its rostrodorsal corner with each of the two lateral ventricles through the left and right interventricular foramen of Monro. Its narrow roof is formed by the tela choroidea which is attached on either side to the tenia thalami; its lateral wall by the medial surface of the thalamus and, below the hypothalamic sulcus, by the hypothalamus which also forms its floor. In lateral profile, the third ventricle exhibits a number of recesses: in its floor, from before backward, 1) the preoptic recess in the acute angle between the base of the lamina terminalis and the dorsum of the optic chiasm, 2) the infundibular recess extending ventrally into the infundibulum but (in humans) not into the hypophysial stalk, and 3) the mamillary or inframamillary recess caused by the protrusion of the mamillary bodies into the ventricle. From its dorsocaudal corner, the pineal recess extends caudally into the pineal stalk. Synonym: ventriculus tertius, diacele, ventricle of diencephalon. (05 Mar 2000)
Lexicographical Neighbors of Third Ventricle
Literary usage of Third ventricle
Below you will find example usage of this term as found in modern and/or classical literature:
1. Anatomy: Descriptive and Surgical by Henry Gray, Thomas Pickering Pick (1897)
"The various structures which enter into the formation of the third ventricle will
now be described more in detail, beginning with those of the ROOF (Fig. ..."
2. The Anatomy of the Nervous System from the Standpoint of Development and by Stephen Walter Ranson (1920)
"THE third ventricle Since the third ventricle is chiefly surrounded by structures
... Roofs of third ventricle or tela chorioidea \ \ \ \ Stria mcd. ..."
3. Cunningham's Manual of Practical Anatomy by Daniel John Cunningham, Arthur Robinson (1914)
"The roof of the third ventricle is formed by a thin epithelial layer which ...
The third ventricle communicates freely with the lateral ventricles, ..."
4. Anatomy, Descriptive and Applied by Henry Gray (1913)
"Other fibres have been described as reaching the cerebellum through the brachia
conjunctiva; while others, again, are lost in the pons. The third ventricle ..."
5. Manual of Practical Anatomy by Daniel John Cunningham (1903)
"former passes forwards between the splenium of the corpus callosum and the body
of the fornix above, and the roof of the third ventricle and the optic ..."
6. A Text Book of Physiology by Michael Foster (1893)
"Meanwhile we may point out, that while this vascular ingrowth seems to make the
cavity of the third ventricle continuous with that of the lateral ventricle ..."
7. A Text-book of physiology by Michael Foster (1891)
"Meanwhile we may point out, that while this vascular ingrowth seems to make the
cavity of the third ventricle continuous with that of the lateral ventricle ..."
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