Lumbricals of the foot
The muscles end in tendons, which pass forward on the medial sides of the four lesser toes, and are inserted into the expansions of the tendons of the extensor digitorum longus muscle on the dorsal surfaces of the proximal phalanges.[1] All four lumbricals insert into extensor hoods of the phalanges, thus creating extension at the inter-phalangeal (PIP and DIP) joints.The most medial lumbrical is innervated by the medial plantar nerve while the remaining three lumbricals are supplied by the lateral plantar nerve.The term "lumbrical" comes from the Latin, meaning "worm".[1] This article incorporates text in the public domain from page 493 of the 20th edition of Gray's Anatomy (1918)