Chap. 13.] Calves of the Legs* their Ufe, &c. 171 



foot, by drawing it upwards, and at the fame time 

 ito turn it inwards. 



The tibialis pofticus proceeds from the upper part 

 pf the tibia near its union with the fibula, then pafling 

 through a perforation in the interofleous ligament, it 

 continues its origin from the interofleous ligament, 

 and from the upper half of the tibia, receiving alfo a 

 few fibres from the fibula. It fends off a round ten- 

 don, which paflcs in 3. groove behind the malleolus 

 internus. It is inferred into the inner part of the os 

 naviculare, and into the adjacent bones, at the internal 

 and upper part of the foot. This mufcle alfo bends 

 the foot, and turns it inwards. 



The two flexors which proceed from the fibula, are, 

 The peroneus longus, which arifes from the fore- 

 part of the head of the fibula or ftrone y and alfo 

 continues to receive fibres from the external part of 

 this bone aimed as low as the ankle. Its tendon 

 runs in a channel at the back part of the outer ankle, 

 thence being reflected to the finuofity of the os calcis, 

 it runs in a groove in the os cuboides, and pafling clofe 

 to the bones in the fole of the foot, it is inferted 

 chiefly into the metatarfal bone of the great toe. 

 This mufcle moves the foot outwards and a little 

 upwards. 



The peroneus brevis arifes from the outer and fore 

 part of the fibula. Its tendon pafles behind the outer 

 ankle, in which fituation it is retained by the fame 

 .ligament as that of the laft mufcle. It is inferted into 

 the root and external part of the metatarfal bone of the 

 little toe. This mufcle alfo moves the foot outwards 

 and a little upwards. 



The common extenfors of the toes are, 

 The extenfor longus digitqrum pedis, which arifes 

 from the upper, outer, and fore part of the tibia, 



yiterofleous 



