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of the tibialis antieus, and ends in an extremely fine muscle, lying in a 

 groove in front of the tibia ; this belly ends in a tendon seventeen inches 

 long, which passes under the extensor of the outer toe along the tendon of 

 the last named, to be inserted into the last phalanx of the inner toe. 

 The action of extension or elevation of the last phalanx and nail is facili- 

 tated by the prolongation upwards of the synovial membrane on the dor- 

 sum of the third phalanx. 



Plexor digiti interni, arises by two heads — one from the outside of 

 the tubercle of the tibia, the other from the external lateral ligament of 

 the knee, separated from each other by the rectus tendon ; these unite, 

 and end in a tendon which passes in a groove in the sheath behind the 

 tibio-metatarsal joint, and is inserted by two slips into the base of the 

 third phalanx of the inner toe ; the deep flexor perforates its last por- 

 tion, and the superficial flexor is perforated by it ; a sesamoid bone ex- 

 ists in the back of the metatarsophalangeal joint, to which the retinacula 

 are attached. 



Plexor digitum magnus begins also by two heads — the upper, fleshy, 

 from a deep pit above the condyles of the femur, in common with several 

 other muscles ; the lower from the tendon of the rectus, and external 

 lateral ligament, and from the back of the fibula ; these heads unite to 

 form two fleshy bellies, detached above, but united below and behind 

 the ankle by the junction of their tendons, which pass in the sheath 

 behind the joint, and here the united tendons are perforated by the 

 flexor externi digiti tendou. In passing down to the foot, the flexor digi- 

 torum tendon receives a slip from that of the gastrocnemius, at the me- 

 tatarso-phalangeal joint, and sends a slip into the sesamoid tubercle of 

 the former tendon ; the tendon forms a sheath on the plantar surface 

 of the toe, and is inserted into the base of the second phalanx by two 

 slips. 



Plexor profundus digitorum is the deepest tendon in the foot ; it 

 commences by two distinct fleshy masses — one from the pit in the back 

 of the condyle of the femur, and the other from the posterior aspect of 

 the tibia for its upper two- thirds ; the tendons of the two are separate 

 as far as near the metatarso-phalangeal joint, where they unite, and are 

 inserted into the last phalanx of the great toe, and by a fine slip into 

 the last phalanx of the outer toe. 



Plexor perforatus externi digiti arises by two heads — one from the pit in 

 the back of the femur by a common muscular origin ; and the second from 

 the external lateral ligament of the knee; the tendon passes down the com- 

 mon groove behind the metatarso-phalangeal joint, where it ends by 

 three slips — one into the proximal phalanx of the lower toe ; the two 

 others are separated by the slip of the flexor profundus ; and the outer is 

 inserted into the base of the second phalanx, in common with the fore- 

 mentioned extensor slip of the little toe ; the third passes to the base of 

 the third phalanx. 



Interosseus — an extremely delicate muscle — arises from the whole 

 length of the interosseus groove, the two heads being separated at their 

 origin by the interosseus artery piercing the bone ; the tendon is flat 



