increased size of the narrow cleft inferior to the corpus callosum, within the diencephalon, between the paired thalami; its floor is formed by the hypothalamus, its anterior wall by the lamina terminalis, and its roof by ependyma; it communicates with the fourth ventricle by the cerebral aqueduct, and with the lateral ventricles by the interventricular foramina
small third ventricle
Synonyms
Exact Synonyms:
enlarged 3rd ventricle
;
enlarged ventriculus tertius
;
increased third ventricle size