See Also: voluntarily(dictionary)
voluntarily(dictionary)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Medicine Lodge Memorial Hospital- Medicine Lodge(health)
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medicine(encyclopedia)
medicine(2)(dictionary)
medicine man(dictionary)
medicine(dictionary)
medicine(dictionary)

Third ventricle (medicine) and voluntarily (oh)


Third ventricle (medicine)


third ventricle


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.


voluntarily (oh)



if you do something voluntarily, you do it willingly, without anyone telling you to do it
::She wasn't fired - she left voluntarily
if you do work voluntarily, you do it because you want to, and are not paid for it
::Susan worked in the studios voluntarily, to gain experience.