third ventricle


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Related to third ventricle: fourth 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.
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.

third ventricle

Etymology: Gk, triotus, below second rank; L, ventriculus, little belly
a cavity of the brain bounded on each side by a thalamus and the hypothalamus. It communicates anteriorly with the lateral ventricles and posteriorly with the aqueduct of the midbrain.

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.

ventricle

a small cavity or chamber, as in the brain or heart.
Enlarge picture
Ventricular system of the brain. By permission from Aspinall V, O'Reilly M, Introduction to Veterinary Anatomy and Physiology, Butterworth Heinemann, 2004

cardiac ventricle
the single fetal cardiac ventricle, formed by the looping of the bulboventricle; divided later by the growth of the interventricular septum as a projection from the wall of the bulboventricle.
fifth ventricle
the median cleft between the two laminae of the brain's septum lucidum.
fourth ventricle
a median, horizontally disposed, rhomboid cavity in the hindbrain, between the cerebellum and medulla, containing cerebrospinal fluid.
gastric ventricle
stomach.
laryngeal ventricle
a variably developed cavity of the larynx that opens into the laryngeal vestibule by a cleft between the vestibular and vocal folds; well developed in dogs and horses and especially certain apes.
lateral ventricle
the cavity in each cerebral hemisphere, derived from the cavity of the embryonic tube, containing cerebrospinal fluid and communicating with the third ventricle.
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.
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 vertically disposed, ring-shaped space that contains cerebrospinal fluid and that communicates anteriorly with the lateral ventricles and caudally with the cerebral aqueduct within the diencephalon between the two thalami.
References in periodicals archive ?
Colloid cyst in the third ventricle and lipoma in the plexus choroideus.
Case reports of colloid cysts in the third ventricle (group I).
Surgery in and around the anterior third ventricle.
The results of our studies indicated that infusion of galanin into the third ventricle may increase the plasma levels of GH, glucagons, fatty acid and urea, and decrease the plasma levels of T3, T4, insulin and glucose in goats undergoing severe body loss.
Chordoid glioma: a neoplasm unique to the hypothalamus and anterior third ventricle.
The lateral ventricles were slightly dilated, but there was no dilation or elongation of the third ventricle or displacement of adjacent hypothalamic structures.
The ventricular system was partially collapsed, but there was no deviation of the septum pellucidum or third ventricle.
For example, Aronica and colleagues recently described the case of an adolescent boy being treated with sumatriptan succinate for migraines, who died suddenly due to a colloid cyst of the third ventricle.
The roof of the third ventricle can be displaced upward because the corpus callosum is not limiting its superior expansion; an interhemispheric cyst or lipoma may be associated (Figure 15).
ventricles and through the foramen of Monro to the third ventricle.
the third ventricle it passes through the aqueduct of Sylvius into the
Examination of the brain revealed only enlarged lateral and third ventricles.