IXTERXAL AXD MIDDLE CUTANEOUS XERVES 



807 



cutaneous nerves. They also contain filjres from the second and third luniliar 

 nerves. 



The internal cutaneous nerve is directed downwards along the outer side of 

 the femoral artery, giving off in this situation two or three cutaneous twigs, which 

 pierce the fascia lata. It then crosses obliquely in front of the femoral artery, at 

 the lower angle of Scarpa's triangle, and divides into an anterior and a posterior 

 branch. Tlie anterior branch is the larger. It runs downwards, in front of the 

 sartorius. under cover of the fascia lata. It pierces the fascia lata about the 

 middle of tlie lower third of the thigh, and, after giving twigs to the skin of that 

 refson, turns outwards to end in the plexus patella?. The posterior branch runs 

 along the posterior border of the sartorius, and, after giving twigs to the sub- 



flg. 464.— dlsteibutiox of cftaxeous nerves os the posterior and 

 Aspects of the Ixfeeior Extremity. 



LAST 

 THORACIC 

 ILIO-HYPO- 

 GASTRIC 



EXTERNAL 

 CLTAyEOUS 



EXTERNA L 

 ( VTASEOVS 



COMMCXI- 



(AXS 

 FIB CLARIS 



SHORT 

 SAPHEXOCS 



POSTERIOR 



nn.iSiHES 



OF LUMBAR 

 .\ER r£S 



POSTERIOR 

 BRANCHES 

 OF SACRAL 

 XERTES 



PER FOR A TISO 

 CVTASEOVSOF 

 SECOSD ASH 

 THIRD SACRAL 



LOSG 

 PVDESDAL 



B RANCHES OF 

 SMALL 

 SCI A TIC 



OBTURATOR 



ILIO- 

 IXGUIXAL 



TWIG 

 FROM IX- 

 TERXAL 

 CUTA- 

 XEOl'S 



POSTERIOR 

 BRANCH OF 

 INTERNA L 



CCTANEOrS 



COMMUNI- 

 CANS 

 TIBIALIS 



IXTERXAL 

 CUTA- 

 XEOUS 



PA TELLAR 

 BRAXCH 

 OF LOXG 

 SAPHE- 



xors 



LOXG 

 SAPHE- 

 NOUS 



TWIGS FROM 

 LOXG 

 SAPHEXOUS 



IXTERXA L 

 CALCAXEAX 



AXTERIOR 

 TIBIAL 



Anterior 



EXTERXAL 

 CUTA- 

 XEOUS 



GEXITO- 

 CRURAL 



MIDDLE 

 CU TA- 

 XED US 



CUTA- 



XKOUS 

 BRAXCH OF 

 EXTERXAL 

 POPLITEAL 



MUSCULO- 

 CUTA- 

 XEOUS 



SHORT 



SA PHE- 



XOUS 



sartorial plexus, runs downwards to the inner aspect of the knee, where it pierces 

 the deep fascia and ends in the integument of the upper and inner part of the 

 calf. 



The middle cutaneous nerve usually takes the form of two strong branches, 

 which run a nearly parallel course. One of these branches usually pierces the 

 sartorius, while the other crosses the superficial surface of that muscle; they pierce 

 the fascia lata a little above the middle of the thigh. They ramify in the super- 

 ficial fascia, supplving the skin of the anterior part of the thigh as far as the knee, 

 where they end in the plexus patellre. 



The deep branches are six in number — one cutaneous (the long saphenous) 

 and five muscular. They are arranged in the following order, from within out- 

 wards: the long saphenous nerve, the nerve to the vastus internus, the nerve to the 



