98 



DISSECTION OF THE DOG 



m. tibialis posterior 



n. plantaris lateralis - 



n. plantaris medialis. 



n\\ 



of transverse fibres contributes great strength to the sheaths. In cleaning 

 the fascia from the surface of the short flexor of the digit, the medial plantar 



nerve which runs along 

 the medial border of 

 the muscle must not 

 be injured. 



M. FLEXOR DIGI- 



tortjm bbevis. — This 

 was mentioned in the 

 dissection of the leg as 

 forming the direct con- 

 tinuation of the plan- 

 taris muscle into the 

 sole. Almost the whole 

 of the muscular tissue 

 of the short flexor has 

 been replaced by ten- 

 don. Continuous with 

 the plantaris tendon 

 at the tuber calcanei, 

 the flattened tendinous 

 band runs down the 

 plantar aspect of the 

 tarsus to the proximal 

 part of the metatarsus, 

 where it divides into 

 two branches, each 

 branch again dividing 

 about the middle of 

 the metatarsus. The 

 initial part of the 

 muscle is intimately 

 connected with the 

 fascia in the region 

 of the tarsus. The 

 four terminal ten- 

 dons enter the flexor 

 sheaths, divide into 

 two slips which form 

 a ring through 

 which the deep 

 flexor tendon passes, 

 and end by becoming 



mm. tnierossei-*- 



- m. abductor digili quinti 



m. flexor digitorum brevis 



- mm. accessom 



Slip from tendon of 



- m. flexor digitorum profundus 



to callosity 



I'lG. 39. — Superficial dissection of the sole. 



