Medical Definition of Ventriculus tertius

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)



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Lexicographical Neighbors of Ventriculus Tertius

ventriculoscopy
ventriculostomy
ventriculosubarachnoid
ventriculotomy
ventriculous
ventriculus
ventriculus cordis
ventriculus dexter
ventriculus laryngis
ventriculus lateralis
ventriculus quartus
ventriculus quintus
ventriculus sinister
ventriculus terminalis
ventriculus tertius (current term)
ventriduct
ventriduction
ventrilocution
ventriloquial
ventriloquially
ventriloquies
ventriloquism
ventriloquisms
ventriloquist
ventriloquist's dummy
ventriloquistic
ventriloquists
ventriloquize
ventriloquized

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