Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== PELVIC WALLS ====== PELVIS * lumbosacral plexus * dorsal division * Superior gluteal nerve: IA, LS, S1 * 2 Inferior gluteal nerve: LS, SI, S2 * 3 erve to piriformis: Sl, S2. * 4 Perforating cutaneous nerve: S2, S3. * ventral division * Nerve to quadratus femoris: L4, LS , Sl. * nerve to obturator internus: LS, Sl, S2. * Pudendal nerve: S2, S3, S4: Supplies * and the sphincter ani extemus, * all muscles in urogenital triangles. * Muscular branches * including perineal branch of nerve S4. * to the levator ani, the coccygeus * 5 Pelvic splanchnic nerves: S2, S3 , S4. * both dorsal and ventral division * sciatic nerve * common peroneal nerve * tibial nerve * posterior cutaneous nerve of thigh * pelvic floor * pelvic diaphragm * pelvis is divided by the plane of pelvic inlet or superior aperture of pelvis in to 2 parts * lesser pelvis or true pelvis * bony walls * anteriorly pubic symphysis and body of pubic bones * posteriorly by sacrum and coccyx * ligaments * obturator membrane * sacrotuberous and sacrospinous ligament * muscles * obturator internus * piriformis * greater pelvis or false pelvis * internal iliac artery * Branches * Medial * Peritoneum and to a few tributaries of the * internal iliac vein. * Lateral * External iliac vessels and obturator nerve * Posterior * Internal iliac vein, lumbosacral trunk and * the sacroiliac joint (see Figs 24.27 and 34.7) * Anterior * In female, it is related to the ovary and * lateral end of the uterine tube (see Fig. 31.1) * and ureter * supplies * pelvic organ * Perineum. * Greater part of the gluteal region. * Iliac fossa. * course * the internal iliac artery begins in front of the sacroiliac joint, at the level of the intervertebral disc between the fifth lwnbar vertebra and the sacrum * lies medial to the psoas major muscle. * The arltery runs downwards and backwards, and ends near thee upper margin of the greater scia tic notch, by dividing into anterior and posterior divisions or trunks * branches * anterior division * 1 Superior vesical * proximal 2..5 cm is persistent umbilical artery * 2 Obturator * medially crossed by ductus deferens and ureter * 3 Middle rectal * 4 Inferior vesical * in female replaced by vaginal artery * vagina , bulb of vestibule * base of urinary bladder * trigone of bladder , prostrate,seminal vesicles * 5 Inferior gluteal * largest branch * axial branch of lower limb * supplies buttock and back of thigh * enters the gluteal region through lower part of greater sciatic foramen * 6 Internal pudendal. The last t:wo are the terminal * in females it if 7th branch uterine artery * supplies vagina , cervix, fallopian tube * posterior division * 1 Iliolumbar. * 2 Two lateral sacral. * 3 Superior gluteal arteries * Structures crossing pelvic inlet or brim * Median sacral vessels * 2 Sympathetic trunk. * 3 Lumbosacral trunk * 4 Iliolumbar artery. * 5 Obturator nerve. * 6 Internal iliac vessels * 7 Medial limb of sigmoid mesocolon with superior * rectal vessels-left side only * 8 Ureter * 9 Sigmoid colon- on left side only. * 10 Ovarian vessels in female * 11 Ductus deferens in male/ round ligament of uterus * in female * 12 Lateral umbilical ligament * 13 Median umbilical ligamen t or urachus * 14 Autonomic nerve plexuses. * 15 Coils of intestine and pregnant uterus. * 16 Full urinary bladder. en/pelvic_wall.txt Last modified: 2023/06/14 09:16by 127.0.0.1