tributary of tributary of vessel drains blood from gastrocnemius popliteal vein vein of hindlimb zeugopod vein gastrocnemius vein divided in medial gastrocnemius vein (vena medialis gastrocnemii), lateral gastrocnemius vein (vena lateralis gastrocnemii), and intergemellar vein (Vena intergemellaris), the vein ascending between the two heads of the gastrocnemius[http://www.veinsurg.com/fr/biblio/echodoppler/echodoppler_11.php] UBERON:0013143 SCTID:264481007 vein of gastrocnemius muscle A vein that drains the gastrocnemius.