<|6 LOWER EXTREMITY. 



fascia. liuSWla'rSS! supply pyriformis, obturator internus, 

 gemelli, and quadutus femoris. Qlutse'US Stlps'lior : back part 

 1 umbo-sacral, passes through grxat sacro-sciatic foramen, the 

 siiperior branch supplying glutseus minimus and medius, the 

 inferior branch supplying glutseus minimus and medius, and 

 lower portion tensor vaginae femoris. Pudi'CBSI plexus, lower 

 part; out great sciatic foramen, in through the lesser sacro- 

 sciatic foramen, terminating in perineal and dorsal nerves of 

 penis. Inferior h&morrhoida! Us > near origin pudic, supplies 

 external sphincter and adjacent integument, communicates 

 with inferior pudendal and superficial perineal. Perince'us 9 

 terminal branch, accompanies perineal artery ; the anterio\ 

 cutaneous branches supply scrotum and under part of penis, 

 (labia), and levator ani ; the posterior branches supp! 

 sphincter ani and integument in front of anus, and back par 

 scrotum. The muscular branches supply transversus perinaei, 

 accelerator urinae, erector penis, compressor urethrae, and 

 bulb. Dorsa'lis pe'nis, along ramus ischii, with puciic artery, 

 follows it and its branches to the glans penis, which it sup- 

 plies. Anas, with sympathetic, supplies integument of pre- 

 puce and of penis, and corpus cavernosum. (In female, to 

 the analogous parts.) 



SCIAT'ICUS PAB'VTIS: supplies integument of perinseum, 

 "back part of thigh and leg, and glutseus maximus. Two 

 branches from sacral plexus unite to form it; follows course 

 of sciatic artery in distribution, piercing fascia in popliteal 

 region, accompanies external saphenous vein to middle of 

 leg. Inferio'res glutce'i, to gltitaeus maximus, several large 

 branches. Inter'nal cuta'nei, to skin of upper and inner side 

 of thigh, posterior aspect; scrotum by inferior pudemial that 

 curves around tuber ischii. Ascended tes cufa'nei, run upwards 

 and supply integument of gluteal region, and muscles. 

 Branches to integument of thigh, popliteal region and upper 

 part of leg. 



SCIAT'ICUS MAG'iTUS: ^ inch wide, and continuation of 

 lower part sacral plexus, passing out of great sacro-sciatic 

 foramen below pyriformis, down between great trochanter 

 and tuber ischii to lower 3d of thigh, there dividing into inter- 

 nal and external poplitseus. Articula'res, to hip-joint and 

 capsule. Muscula*res, to flexors of the leg, adductor magnus, 

 in tegument of the back part of thigh also supplied by this 

 nerve. 



POPLITJE'US INTEB'NUS; (see above); largest terminal 

 branch; down through middle of popliteal space, beneath 



