Flexor digitorum accessorius longus muscle.

The flexor digitorum accessorius longus muscle was encountered during routine dissection of the posteromedial region of the left ankle of an 84-year-old female cadaver, by a first year podiatric medical student, in a lower extremity anatomy laboratory session. The purpose of this article is to describe the flexor digitorum accessorius longus muscle as it appeared in the cadaver; to provide background information on the muscle; and provide clinical implications for the podiatric medical practitioner.