Definition: the several veins that drain the mesencephalon; the posterior ones are tributaries to the great cerebral vein; the lateral ones are tributaries to the basal vein. The main veins are: pontomesencephalic vein [TA] (vena pontomesencephalica [TA]), interpeduncular veins [TA] (venae interpedunculares [TA]), intercollicular vein [TA] (vena intercollicularis [TA]), and lateral mesencephalic vein [TA] (vena mesencephalica lateralis [TA]).
Synonym(s): venae mesencephalicae
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