392 



MUSCLES ON THE SOLE OF THE FOOT. 



Fig. 105.* 



fleshy belly, which sends off four tendons that split for the pas- 

 sage of the flexor longus. 



Inserted into the second phalanx of 

 the four lesser toes. The tendon of the 

 little toe is often wanting. 



Use. To bend the second joint of the 

 toes, 



2. Flexor Digitorum Accessorim, seu, 

 Massa Carnea Jacobii Sylvii, 



Arises, by a thin fleshy origin, from 

 most part of the sinuosity at the in- 

 side of the os calcis, which is continued 

 forwards, for some space on the same 

 bone ; also, by a thin tendinous begin- 

 ning, from before the tnberosity of the 

 os calcis, externally, and, soon becom- 

 ing all fleshy, is 



Inserted into the tendon of the 

 flexor longus, just at its division into 

 four tendons. 

 Use. To assist the flexor longus. 



3. Lumbricales Pcdis, 



Arises, by four tendinous and fleshy beginnings, from the 

 tendon of the flexor profundus, just before its division, near 

 the insertion of the massa carnea. 



Inserted, by four slender tendons, into the inside of the first 

 joint of the four lesser toes, and are lost in the tendinous ex- 

 pansion that is sent from the extensors to cover the upper part 

 of the toes. 



* The first layer of muscles in the sole of the foot : this layer is exposed by 

 the removal of the plantar fascia. 1. The os calcis. 2. The posterior part of 

 the plantar fascia divided transversely. 3. The abductor pollicis. 4. The ab- 

 ductor minimi digiti. 5. The flexor brevis digitorum. 6. The tendon of the 

 flexor longus pollicis muscle. 7, 7. The lumbricales. On the second and third 

 toes, the tendons of the flexor longus digitorum are seen passing through the 

 bifurcation of the tendons of the flexor brevis digitorum. 



