NERVES 175 



i inch below head of that bone it pierces the peroneus longus, 

 and in that muscle divides into anterior tibial and musculo- 

 cutaneous nerves. 



Branches : 



Articular (2) : generally given off together, accompany 

 superior and inferior external articular arteries. 



Cutaneous : supply integument of back and outer side of 

 leg in upper third. 



Peroneal or fibular communicating : arises close to head of 

 fibula and joins the tibial communicating, the two forming 

 the short saphenous nerve. 



Anterior tibial : passes to front of interosseous membrane 

 by piercing extensor longus digitorum to reach outer side of 

 anterior tibial artery, with which it descends to the ankle- 

 joint, where it bifurcates into an internal and external 

 branch ; it lies in middle J of leg, in front of artery, and 

 in lowest ^, again, outside it. 



Branches : 



Recurrent articular: sends a branch to knee, which accom- 

 panies anterior tibial recurrent artery to joint. 



Muscular : to tibialis anticus, extensor longus digitorum, 

 peroneus tertius, and extensor proprius hallucis. 



External or tarsal : passes outwards beneath the extensor 

 brevis digitorum and becomes ganglionic, supplies the extensor 

 brevis, and the articulations of the tarsus and metatarsus. 



Internal: accompanies dorsalis pedis to ist interosseous 

 space, lying outside it, supplies adjacent sides of ist and 2nd 

 toes, communicating with the musculo-cutaneous. 



Musculo-cutaneous : supplies peroneus longus and brevis, 

 and dorsal integument of foot. It passes down between 

 peronei and the long extensor of toes, piercing deep fascia at 

 lower of leg. 



Branches : 



Muscular : to peroneus longus and peroneus brevis. 



Cutaneous : to lower part of leg. 



Internal: passes over ankle to inner side of ist toe and 

 adjacent sides of 2nd and 3rd toes, communicates with internal 

 saphenous and anterior tibial nerves. 



External : supplies adjoining sides of 3rd, 4th, and 5th toes; 

 communicates with short saphenous. 



SYMPATHETIC NERVES 

 The sympathetic system consists of 



1. The great gangliated cords. 



2. The prevertebral plexuses, and branches proceeding 



from them. 



