third ventricle

ventricle

[ven´trĭ-k'l] a small cavity or chamber, as in the brain or heart.ventricle of Arantius 1. the rhomboid fossa, especially its lower end.2. cavity of septum pellucidum.fifth ventricle cavity of septum pellucidum.fourth ventricle a median cavity in the hindbrain, containing cerebrospinal fluid.ventricle of larynx the space between the true and false vocal cords.lateral ventricle the cavity in each cerebral hemisphere, derived from the cavity of the embryonic tube, containing cerebrospinal fluid.left ventricle the lower chamber of the left side of the heart, which pumps oxygenated blood out through the aorta to all the tissues of the body.Morgagni's ventricle ventricle of larynx.pineal ventricle an extension of the third ventricle into the stalk of the pineal body.right ventricle the lower chamber of the right side of the heart, which pumps venous blood through the pulmonary trunk and arteries to the capillaries of the lung.third ventricle a narrow cleft below the corpus callosum, within the diencephalon between the two thalami.

third ven·tri·cle

[TA] 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 that is attached on either side to the tenia thalami; its lateral wall is formed 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 rostral to caudal, 1) the supraoptic 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 mammillary or inframammillary recess caused by the protrusion of the mammillary bodies into the ventricle. From its posterocaudal corner, the pineal and suprapineal recesses extend caudally in relation to the pineal gland. Synonym(s): ventriculus tertius [TA], ventricle of diencephalon

third ven·tri·cle

(thĭrd ven'tri-kĕl) [TA] 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 foramina 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.
Synonym(s): ventriculus tertius [TA] .

third ventricle

The small, slit-like midline, fluid-filled space in the centre of the brain which communicates with the two large lateral ventricles, one in each hemisphere, and with the FOURTH VENTRICLE behind.

third ventricle

third ventricle

ventricle

third ven·tri·cle

third ven·tri·cle

third ventricle

third ventricle

Words related to third ventricle

noun a narrow ventricle in the midplane below the corpus callosum

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