186 



insertion 

 into bones 

 of the foot ; 



relations in 

 the leg ; 



use on foot, 

 free, 



and fixed ; 

 on the leg. 



Peroneus 

 brevis is 

 attached to 



fibula, 

 and fifth 

 inetatarsal 

 bone ; 



relations ; 



use on foot, 

 free, 



and fixed ; 

 on the leg. 



DISSECTION OF THE LEG. 



sole of the foot. Its position in the foot and its insertion will be - 

 described later on (p. 212). 



In the leg the muscle is immediately beneath the fascia, and lies 

 on the peroneus brevis. Beneath the annular ligament it is placed 

 over the middle piece of the external lateral ligament of the ankle 

 with the peroneus brevis, and is surrounded by a single synovial 

 membrane common to both. The extensor longus digitorum and 

 the soleus are fixed to the fibula in front of, and behind it respec- 

 tively. 



Action. With the foot free, the muscle extends the ankle ; then 

 it can depress the inner, and raise the outer border of the foot in 

 the movement of eversion. 



When the foot rests on the ground, it assists to lift the os calcis 

 and the weight of the body, as in standing on the toes, or in 

 walking. And in rising from a stooping posture it draws back 

 the fibula. 



The PERONEUS BREVIS (fig. 74, H) reaches the outer side of th< 

 foot, and is smaller and deeper than the preceding muscle. It 

 arises from the outer surface of the shaft of the fibula for about the 

 lower two-thirds, extending upwards by a pointed piece in front of 

 the peroneus longus (fig. 68), and from the intermuscular septum 

 on each side. Its tendon passes with that of the peroneus longus 

 beneath the external annular ligament, and is placed next the fibula 

 as it turns below this bone. Escaped from the ligament, the tendon 

 enters a distinct fibrous sheath, which conducts it along the tarsus 

 to its insertion into the tuberosity at the base of the metatarsal bone 

 of the little toe on the outer side. 



In the leg the muscle projects in front of the peroneus longus. 

 On the outer side of the os calcis it is contained in a sheath above 

 the tendon of the former muscle ; and each sheath is lined by 

 prolongation from the common synovial membrane behind the outer 

 ankle. 



Action. If the foot be unsupported, this peroneus extends the 

 ankle and moves the foot upwards and outwards, everting it. 



If the foot be supported it is able to raise the heel, and to 

 bring back the fibula as the body rises from stooping. 



Take away 

 the skin. 



SECTION V. 



THE BACK OF THE LEG. 



Position. For the dissection of the back of the leg, the limb is 

 to be placed on its front, with the foot over the side of the dissecting 

 table ; and the muscles of the calf are to be put on the stretch by 

 fastening the foot. 



Dissection. For the removal of the skin, one cut should be 

 made along the middle of the leg to the sole of the foot, where a 

 transverse incision is to be carried over the heel. The two resulting 



