A manual of anatomy . into the lateral surface of the baseof the first phalanx of the little toe. Actions.—Flexes and abducts the little toe. 2o8 MYOLOGY Nerve Supply.—^Lateral plantar nerve (S. i, 2). Second Layer.—The mm. lumbricales are Jour muscles associatedwith the flexor digitorum longus tendons. The first arises from themedial side of the tendon for the second toe and the others arise fromthe adjacent side of all four tendons. Each muscle is inserted intothe extensor tendon and the base of the first phalanx of the fourouter toes, as in the hand. Actions.—Flex the metatarsophalangeal jo
A manual of anatomy . into the lateral surface of the baseof the first phalanx of the little toe. Actions.—Flexes and abducts the little toe. 2o8 MYOLOGY Nerve Supply.—^Lateral plantar nerve (S. i, 2). Second Layer.—The mm. lumbricales are Jour muscles associatedwith the flexor digitorum longus tendons. The first arises from themedial side of the tendon for the second toe and the others arise fromthe adjacent side of all four tendons. Each muscle is inserted intothe extensor tendon and the base of the first phalanx of the fourouter toes, as in the hand. Actions.—Flex the metatarsophalangeal joints and extend theinterphalangeal joints of the four outer toes. Nerve Supply.—The first or medial lumbricale, medial plantarnerve (L. 4, 5, S. i); the other three, lateral plantar nerve (S. i, 3). Internal plantereminence(Abductor Middleplantar eniir)er)ce £xt plantar eminence(Abductor di^lti V) External plantar-droove Pig. 161.—The plantar aponeurosis.(Sobotta and McMurrich.) Tendon Fig. 162.—The superficial layerof the plantar muscles. The plantarfascia has been largely removed fromthe surface of the flexor digitorumbrevis. {Sobotla and McMurrich.) The m. quadratus plantse or accessorius, arises from the lateralmargin of the plantar ligament and the adjacent portion of the plan-tar surface of the calcaneus; a medial head arises from the medialmargin of the long plantar ligament and from the medial surface ofthe calcaneus. Its flattened tendon is inserted into the tendons ofthe flexor digitorum longus (mainly for the second, third and fourthtoes). Actions.—Assists in flexing the toes and draws the long tendonsinto the middle of the sole of the foot. Nerve Supply.—^Lateral plantar nerve (S. i, 2). The tendons of the mm. flexor hallucis longus and flexor digitorumlongus are included in this layer. Third Layer.—The m. flexor hallucis brevis arises from the tendon THE MUSCLES OF THE FOOT 209 of the tibialis posterior and the plantar surfa
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
