NERVES. 45 



ANTETJIOB CRUBA'LIS I 3^ n d 4th lumbar, through psoas 

 beneath Poupart's ligament to thigh, external to artery in 

 pelvis, supplies iliacus, and femoral artery; without, all the 

 muscles on front of the thigh but the tensor vaginae femoris. 

 Cata'ne'iS me'd.m: through fascia lata below Poupart's ligament, 

 dividing inio 2 branches, supplying sartorius and integument 

 in front as low as knee. Cut /HGUS fat T'HU3, obliquely across 

 upper part femoral sheath, the anterior branch perforating 

 fascia at lower 3d of thigh, supplies integument of inside of 

 thigh to kne^-joint; the inner branch descends along posterior 

 border sartorius to knee, piercing fascia, giving off numerous 

 branches, descending still farther, supplying integument of 

 inner side of leg. Sap-6'nU3 intorLus, downwards beneath sar- 

 torius to knee, inner side, then along inner side of leg in 

 company with internal sophenous vein, dividing into 2 

 branches, one terminating at inner ankle, the other distribu- 

 ted to integument of dorsum of foot. Supplies muscles and 

 integument in its course, giving off branches communicating 

 with internal cutaneous and obturator nerves ; another to 

 patellar integument and forms a * ' plexus patellae " with othar 

 branches. Ifil.CUla'reS, all muscles of front of leg but tensor 

 vaginae fcmons. Articula'res, i to knee-joint ligaments. 



SACIA'_S3 : 5; the 4 upper through anterior sacral canals, 

 the 5.h through the sacro-coccygeal foramen ; the posterior 

 are smaller and through posterior sacral canals, except the 

 5th, which is through posterior sacro-coccygeal foramen. 

 Have long roots . Posterior internal branches supply multi- 

 fidusspinx. Posterior external branches supply integument 

 over sacrum, coccyx and posterior gluteal region, forming 

 many anastomosing loops. Anterior, the 4 upper supplying 

 rectum, bladder, (vagina) and pelvic viscera (communicating 

 with sympathetic), wi.h their muscular branches supplying 

 Icvator ar.i, coccygeus, sphincter ani, and integument be- 

 tween anus and coccyx. The 5th pierces coccygrus muscle, 

 supplies integument over coccyx, communicating with coccy- 

 geal. 



COCCiaEA'LIS : posterior branch receives branch of com. 

 from postc.ior sacral and is lost in fibrous cover of coccyx. 

 Anterior branch pierces sacro-sciatic linament, supplying 

 integument about coccyx. Anas. 5th sacral. 



SA'C2AL PLSZ'US; is formed by lumbo-sacral, the anterior 

 branches of 3 upper (and part of the 4th) sacral nerves. Is 

 triangular in form, the base corresponding to the exits of 

 nerves, and rests on pyriformis, anterior surface, covered by 



