quadratus plantae muscle


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quad·ra·tus plan·tae mus·cle

(kwah-drā'tŭs plan'tē mŭs'ĕl)
Origin, by two heads from the lateral and medial borders of the inferior surface of the calcaneus; insertion, tendons of flexor digitorum longus; action, assists long flexor; nerve supply, lateral plantar.
Synonym(s): musculus quadratus plantae [TA] .