ANATOMY. 



MUSCLES OF THE FOOT. 



Extensor Brevis Digitorum, the only muscle on the dorsum of the foot, 

 arises from the os calcis externally, the astragalo-calcanean and the anterior 

 annular ligaments, by 4 tendons, I into the ist phalanx of the great toe, 

 and the others into the outer sides of the long extensor tendons of the 2d, 

 3d, and 4th toes. Action, to extend the toes. Nerve, anterior tibial. 



Muscles on the sole of the foot (19), by layers : 

 1st Layer. 3d Layer. 



Flexor Brevis Digitorum. Flexor Brevis Pol lids. 



Abductor Pollicis. Flexor Brevis Minimi Digiti. -\ Pancoast's Tri, 



Abductor Minimi Digiti. Adductor Pollicis. V angle, the low- 



2d Layer. Transversus Pedis. J est in tne bod y' 



Flexor Accessorius. 4th Layer. 



Lumbricales (4). Interossei (4. Dorsal, j Plantar]. 



Abductor Pollicis,^ from the inner tuberosity of the os calcis, the internal 

 annular ligament, plantar fascia, and intermuscular septum, into the inner 

 side of the base of the ist phalanx of the great toe. Action, to abduct the 

 great toe. Nerve, internal plantar. 



Flexor Brevis Digitorum,/ from the inner tuberosity of the os calcis, the 

 plantar fascia and intermuscular septa, into the sides of the 2d pha- 



FIG. 52. 



langes of the lesser toes by 4 tendons which 

 are perforated for the long flexor tendons. 

 Action, to flex the lesser toes. Nerve, internal 

 plantar. 



Abductor Minimi Digiti/* from the outer tuber- 

 osity and under surface of the os calcis, the 

 plantar fascia and the intermuscular septum, 

 into the base of the 1st phalanx of the little toe 

 with the tendon of its short flexor. Action, to 

 abduct the little toe. Nerve, external plantar. 



Flexor Accessorius, by 2 heads, from the os 

 calcis and the calcaneo-scaphoid and long 

 plantar ligaments, into the tendon of the flexor 

 longus digitorum. Action, accessory flexor of 

 the toes. Nerve, external plantar. 



Lumbricales^ (^},from the long flexor tendons 

 into the inner side of the second phalanges 

 of the lesser toes. Action, accessory flexors. 

 Nerves, internal plantar to the two internal, 

 external plantar to the others. 



