SF 
( 
Fic. 162.—THE LumBar aND SACRAL NERVES, AS SEEN IN A VIEW OF THE 
DorsaL WALL OF THE ABDOMINAL CAVITY, AFTER REMOVAL OF THE 
VISCERA, 
On the right side the iliopsoas, psoas minor, and quadratus lumborum have been 
removed. The symphysis pubis has been split and the two parts divaricated; to 
show the pelvic cavity; on the right side parts of the innominate bones and the 
levator ani and coccygeus muscles have been removed. //-V//, second to seventh 
lumbar nerves; 1-3, first to third sacral nerves. @, second lumbar nerve; 4, lateral 
and medial branches of third lumbar nerve; ¢c, N. genitofemoralis (c’, its lateral 
branch; c’’, ils medial branch); @, N. cutaneus femoralis lateralis; e, muscular 
branch of N. femoralis; 7, N. femoralis; g, N. obturatorius; 4, N. ischiadicus or 
great sciatic nerve: 7, N. gluteus superior; 7, N. gluteus inferior; 4, N. cutaneus 
femoris posterior; 7, N. pudendus; m, N. hemorrhoidalis inferior; 2, part of the 
sympathetic (incompletely shown, merely to indicate connections with the spinal 
nerves); 4, M. transversus abdominis: 5. 6, cut edges of M. obliquus internus and 
externus; 7, dorsal border of the diaphragm; 8, M. iliopsoas (mostly removed on the 
right side); 9, M. psoas minor; 10, M. pyriformis; 11, M. levator ani; 11’, M. ilio- 
caudalis: 12, M. flexor caudz longus; 13, M. flexor caudze brevis; 14, edge of pubic 
symphysis; 15, cut end of M. obturator internus; 16, cut ramus of ischium; 17, cut 
ramus of pubis. 
