[TA] branches arising from the medial aspect of the posterior tibial artery at the level of the narrowest part of the leg, passing to tissues in the region of the posterior aspect of the medial malleolus; anastomose with medial malleolar branches of the anterior tibial artery. SYN: rami malleolares mediales arteriae tibialis posterioris [TA], arteriae malleolares posteriores mediales, medial malleolar arteries.