MUSCLES OF THE LEG. 455 



bursa invests this tendon where it passes beneath the annular 



ligament. 



It extends, as its name implies, the great toe.* 



On the outside of the leg, between the fibula and fascia, are 



the two Peronei muscles. 



The Peroneous Longus, sen Primus, 



Arises, tendinous and fleshy, from the fore and outside of 

 the head of the fibula, from the space on its outer side above, 

 between the external and anterior angles; also, from its external 

 angle to within a short distance of the ankle. 



A flattened thick tendon, to which the fibres pass obliquely, 

 constitutes the outer face of the muscle. This tendon is lodged 

 in the groove at the posterior part of the malleolus externus, 

 being confined to it by a thick ligamentous noose, and furnished 

 there with a bursa; it then traverses the outer side of the os cal- 

 cis, where its passage is marked by a superficial sulcus; it then 

 runs through the groove of the os cuboides, where there is ano- 

 ther bursa. Lying deep in the sole of the foot, covered by the 

 calcaneo-cuboid ligament, and next to the tarsal bones, it is in- 

 serted into the base of the internal cuneiform bone, and into the 

 adjacent part of the metatarsal bone of the great toe. 



It extends the foot and inclines the sole obliquely outwards. 

 It corresponds with the flexor carpi ulnaris of the fore arm. 



As the tendon experiences much friction at the ankle, on the 

 os calcis, and where it winds around the os cuboides, it is not 

 unusual to find in it small sesamoid bones there, especially at 

 the latter place. 



The Peroneus Brevis, sen Secundus t 



Is concealed in a great degree by the peroneus longus, being 

 situated between the latter and the extensor longus digilorum. 

 It arises, tendinous and fleshy, from the outer surface of the 

 fibula, commencing about one-third of the length of the bone 

 from its head, and continuing almost to the ankle. 



Varieties. A partial effort is sometimes manifested to divide it into two mus- 

 cles. 



