218 ANATOMY IX A NUTSHELL. 



between the second and third toes and divides to supply the adjacent sides of 

 the cleft. 



The external terminal branch is the smaller of the two and passes along 

 the outer side of the dorsum of the toot and divides into two branches. The 

 inner one suppli* s t he integument of the adjacent sides of the third and fourth 

 toes. The outer one supplies the integument on the adjacent sides of the fourth 

 and fifth toes. The outer side of the fifth toe receives the short saphenous 

 nerve. 



The anterior tibial nerve comes from the end of the peroneal nerve just 

 internal to the musculo-cutaneous between the Peroneus longus and the neck 

 of the fibula. It passe- forward and inward beneath the Extensor longus dig- 

 itorum to lie in the interval between this muscle and the Tibialis anticus. It 

 descends on the interosseous membrane with the anterior tibial artery to the 

 front of the ankle-joinl where it divides into an inner and an outer terminal 

 branch. The inner terminal branch passes down along the dorsalis pedis artery 

 and supplies the integument along the adjacent sides of the first and second 

 toes. It also supplies the periosteum of the adjacent bones, the metatarso- 

 phalangeal and inter-phalangeal joints. It helps to supply the First dorsal 

 interosseous muscle. The outer terminal branch passes under the Extensor 

 brevis digitorum outward. This branch has a ganglion upon it which supplies 

 the Extensor brevis digitorum, tarsal joints and the bones, periosteum, and 

 joints of the three outer intermetatarsal spaces. It helps to supply the Second 

 dorsal interosseous muscle. 



The anterior tibial nerve gives ( 1 ) muscular branches to Tibialis anticus. 

 Extensor longus digitorum, Extensor proprius hallucis, Peroneus tertius, Ex- 

 tensor brevis digitorum, and as said before helps to supply two inner Dorsal 

 interossei. (2) Articular branches to the inferior tibio-fibular articulation 

 and the ankle-joint. (Plate LXXY1.) 



The coccygeal plexus (Plate LXIII-LXXIII.) is formed by the anterior 

 branches of part of the fourth sacral nerve, the fifth sacral and the coccygeal 

 nerve. It is situated on the inner surface of the Coccygeus muscle and behind 

 the Second portion of the rectum. Its muscular branches supply the Coccygeus 

 muscle and Levator aid. while its visceral branches together with the sympa- 

 thetic supply the pelvis viscera. For the complete distribution of the cutan- 

 eous nerve supply of the lower limb see (Plates LXXX-LXXXI.) 



LESSOX LXI. 

 Thk Superficial Fascia of the Thigh. 

 The superficial fascia i> continuous with that of the leg below and that of 

 the abdomen above. It has an superficial and a deep layer, between which 

 layers are die superficial vessels and nerves. Really these structures are in 

 the deep layer but the line of distinction cannot be closely drawn between the 

 superficial deep layers. This fascia is beneath 1 he integument and forms an 

 investment for the entire thigh. It is attached (1) to the margin of the saph- 

 enous opening, (2) to the femoral sheath through the saphenous opening, (3) 

 to the fascia lata below Poupart's ligament. The cribriform fascia, which 

 form- one of the coverings of ;) femoral hernia, is that part of the superficial 



