innervated by innervated_by has muscle origin has muscle origin has muscle insertion has muscle insertion has muscle antagonist tibia tibial nerve tibialis anterior fibula navicular bone of pes distal tarsal bone 1 tibialis posterior http://upload.wikimedia.org/wikipedia/commons/9/92/Gray442.png The Tibialis posterior is the most central of all the leg muscles, and is located in the posterior compartment of the leg. It is the key stabilizing muscle of the lower leg. [WP,unvetted]. tibialis posterior muscle NCIT:C53078 BTO:0000867 FMA:51099 musculus tibialis posterior MA:0002394 Wikipedia:Tibialis_posterior_muscle ibialis posticus EMAPA:36255 SCTID:361824007 UMLS:C1711425 UBERON:0001667 tibialis caudalis posterior tibialis tibialis