noun
tibialis posterior muscle
Anatomical term for the muscle located in the deep posterior compartment of the lower leg.
後脛骨筋は足の内側のアーチを支える重要な筋肉です。
The tibialis posterior muscle is an important muscle that supports the medial arch of the foot.
Compound of 後 (kō, 'posterior'), 脛骨 (keikotsu, 'tibia'), and 筋 (kin, 'muscle').