I'ART (>/' I.Oll'l-.K EXTREMITY. 



37 



S. The fourth layer of muscles: Dorsal interossei, four in number; plantar 

 interossei, tlircc in number ; the nerve- and blood-SUpply to these. (Fig. 275.) 



9. The tendon of tlic pcro>icns longiis and its sesamoid bone. ( Fig. 275.) 



Incisions. Start at the middle ot "the os calcis and make one cut through the 

 skin to the middle of the great toe ; the other to the middle of the little toe. 

 This V-incision will permit you to find : 



i. The plantar cutaneous nerve, a branch of the posterior tibial nerve. 



Abductor hallucis 



Flexor brevls dlgitorum 

 1XTERXAL 1'l.AXTAR 



XKR VE 



Internal plantar artery 



BRANCH OF I. \TEK- 

 XA L PLANTAR 

 \ I-:K \'E TO INKER 

 XI 1>E OF HALLUX 



Abductor minimi diiltl 



External plantar artery 



EXTERXAI. PLANTAR 

 KER VE 



Llgamenta vaginalej; 



DIGITAL COLLATERAL 

 11K A. \cllh* Of EX- 

 TKKXAL PLAXTAR 



DIGITAL COLLATERAL 

 BRA NCHES OF IX TER 

 NAL PLAXTAR 



FIG. 272. SUPERFICIAL NKRVES in THE SOLE OF THE FOOT. (Ellis.) 

 (In this dissection the greater part of the plantar fascia has been removed.) 



(Fig. 272.) .This is a sensory nerve to the heel, and you will find it in the thick 

 pad of fat in the superficial fascia. Sometimes the granular fat here is three- 

 fourths of an inch thick. 



2. The cutaneous branches of the internal and external plantar vessels 

 and nerves. Kxercise now your common sense in removing the skin. 



The superficial fascia contains much fat. The fat found in the palms of the 

 hands, in the soles of the feet of the adult, and all over the body of the child at 



