THE LEG 275 



anteriorly between the peronaeus longus muscle and the bone. 

 The muscle must therefore be carefully turned aside from 

 its origin in order that the nerve may be followed. It will 

 be found to give off a small recurrent articular nerve to the 

 knee-joint, and then to divide into the deep and superficial 

 peroneal nerves. 



The recurrent branch accompanies the anterior recurrent 

 tibial artery. It turns proximally in the fibres of the tibialis 

 anterior. To the proximal part of this muscle it gives several 

 twigs, whilst its terminal filaments gain the front of the 

 knee-joint. 



The deep peroneal nerve pierces the proximal part of the 

 extensor digitorum longus to reach the anterior region of the 

 leg, where it has already been dissected. 



N. Peronseus Superficial (O.T. Musculo-Cutaneous Nerve). 

 -This nerve proceeds distally in the substance of the 

 peronaeus longus. It reaches the interval between the two 

 peronei muscles, gives branches to both, and, lastly, comes 

 to lie between the peronaeus brevis and the extensor digitorum 

 longus. In the distal third of the leg it pierces the fascia, 

 becomes cutaneous, and divides into the medial and inter- 

 mediate dorsal cutaneous nerves of the foot (p. 260). 



MEDIAL CRURAL REGION. 



This region corresponds to the subcutaneous or medial 

 surface of the tibia. The deep fascia blends with the peri- 

 osteum of the bone, and the only structures which have to 

 be examined are : 



1. The great saphenous vein. 



2. The saphenous nerve. 



3. The expanded tendons of insertion of the sartorius, semitendinosus, and 



gracilis. 



4. Tibial collateral ligament of the knee-joint. 



5. Inferior medial genicular artery. 



6. Inferior medial articular nerve. 



The great saphenous vein and the saphenous nerves, as they 

 pass from the anterior to the posterior crural region, cross 

 obliquely over the distal third of the medial surface of the 

 tibia. 



The insertions of the sartorius, gracilis, and semitendinosus 

 into the proximal part of the medial surface of the tibia should 



