3 88 



PRACTICAL ANATOMY. 



term, is called granular. Remove all this fatty tissue, and notice it becomes less 

 abundant in the hollow of the foot and toward the toes. 



The deep fascia occurs in the sole of the foot, under two names : (i) From 

 the heel to the clefts of the toes it is called plantar fascia ; (2) from the clefts of 

 the toes onward it forms very dense sheaths for the flexor tendons of the toes. 

 These sheaths are called the ligamenta vaginales (ligamentum vaginalis, in the 

 singular). 



Dissection of Plantar Fascia and Ligamenta Vaginales. Having now cut 

 through the dense, deep fascia of the toes, the ligamenta vaginales, you 



External calcanean artery 

 Cutaneous branch of external plantar 



Abductor minimi digit! 



Anastomotic branch -- 

 External plantar artery 



First digital fo outer side of 

 little toe 

 Lumbrical muscle 



Second digital 

 Third digital 

 Fourth digital 



Anastomosis about inter- 



phafangeal joint 

 Dorsal branch of collateral 

 digital 



Anastomosis of collateral digital 

 arteries around matrix of nail 

 and pulp of toe 



Internal calcanean artery 



Cutaneous branch of internal 

 plantar 



Plantar fascia, out 



Abductor hallucis 



Internal plantar artery 



Flexor brevia digitoruii 



Brnnch of internal plantar (o 

 (iiffi/ftl arteries (superficial 

 digital} 



Flexor brevia hallucia 



Princeps hallucfs, or fifth plantar 

 digital artery 



Collateral digital branch ofprinccps 



hallucis to second toe 

 Collateral digital branch of princfps 



hallucis to inner side of great toe 

 Collateral digital branch of princeps 

 hallucis to outer side of great toe 



FIG. 273. THE PLANTAR ARTERIES. 

 (From a dissection in the Museum of St. Bartholomew's Hospital.) 



must find : (i) The theca and the thecal culs-de-sac, the synovial sheath of the 

 tendons ; (2) the vincula, delicate thread-like bands of deep fascia ; (3) the ten- 

 dons of the flexor longus digitorum ; (4) the tendons of the flexor brevis digi- 

 torum ; (5) the slits, in tendons of the flexor brevis digitorum ; (6) the grooves 

 on the plantar surfaces of the pedal phalanges ; (7) the outer division of the 

 plantar fascia, quite thin, covering the abductor minimi digiti muscle ; (8) the inner 

 division of the plantar fascia, quite thin, covering the abductor hallucis ; (9) the 

 middle division of the plantar fascia, very thick, strong, and glistening, covering 

 the flexor brevis digitorum; (10) two intermuscular grooves almost under the 



