great cerebral vein of Galen
a large, unpaired vein formed by the junction of the two internal cerebral veins in the caudal part of the tela choroidea of the third ventricle; it passes caudally between the splenium of the corpus callosum and the pineal gland, curving dorsally to merge with the inferior sagittal sinus to form the straight sinus.
Synonym(s): great cerebral veinTA, vena magna cerebriTA, great vein of Galen
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Examples: glitazone, GI cocktail, etc.