THE SACRAL AND COCCYGEAL NERVES 



965 



COMMON PERO- 

 NEAL NERVE 



SUPERFICIAL 

 PERONEAL NERVE! 



STELLAR BRANCH OF 

 APHENOUS NERVE 



-SAPHENOUS NERVE 



DEEP PERONEAL 

 NERVE 



CUTANEOUS BRANCH 

 OF SUPERFICIAL 

 PERONEAL 



leg, and joins with the medial sural cutaneous to form the sural nerve. The 

 peroneal anastomotic is occasionally continued down as a separate branch as far 

 as the heel. 



The Deep Peroneal Nerve (n. peronceus profundus; anterior tibial nerve) (Fig. 

 827) begins at the bifurcation of the common peroneal nerve, between the fibula 

 and upper part of the Peronseus 

 longus, passes obliquely forward 

 beneath the Extensor digitorum 

 longus to the front of the inter- 

 osseous membrane, and comes 

 into relation with the anterior 

 tibial artery above the middle 

 of the leg; it then descends with 

 the artery to the front of the 

 ankle-joint, where it divides into 

 a lateral and a medial terminal 

 branch. It lies at first on the 

 lateral side of the anterior tibial 

 artery, then in front of it, and 

 again on its lateral side at the 

 ankle-joint. 



In the leg, the deep peroneal 

 nerve supplies muscular branches 

 to the Tibialis anterior, Extensor 

 digitorum longus, Peronreus ter- 

 tius, and Extensor hallucis pro- 

 p ius, and an articular branch to 

 the ankle-joint. 



The lateral terminal branch 

 (external or tarsal branch) passes 

 across the tarsus, beneath the 

 Extensor digitorum brevis, and, 

 having become enlarged like the 

 dorsal interosseous nerve at the 

 wrist, supplies the Extensor digi- 

 torumbrevis. From the enlarge- 

 ment three minute interosseous 

 branches are given off, which sup- 

 ply the tarsal joints and the 

 metatarsophalangeal joints of 

 the second, third, and fourth 

 toes. The first of these sends a 

 filament to the second Inter- 

 osseus dorsalis muscle. 



The medial terminal branch 

 (internal branch) accompanies 

 the dorsalis pedis artery along 

 the dorsum of the foot, and, at 

 the first interosseous space, di- 

 vides into two dorsal digital 

 nerves (nn. digitales dorsales hallucis lateralis et digiti secundi medialis) which supply 

 the adjacent sides of the great and second toes, communicating with the medial 

 dorsal cutaneous branch of the superficial peroneal nerve. Before it divides it 

 gives off to the first space an interosseous branch which supplies the metatarso- 



SURAL NERVE- 



. LATERAL BRANCH OF 

 DEEP PERONEAL 



.MEDIAL TERMINAL 

 BRANCH 



-DIGITORUM 



BRANCHES OF 

 SUPERFICIAL PERONEAL 



FIG. 835. Deep nerves of the front of the leg. 



(Testut. 





