. Regional anesthesia : its technic and clinical application . urface of the sacrum, from which it is sepa-rated by the pyriformis muscle, and is covered by the parietal portionof the pelvic fascia. In front of it lie the ureter, the pelvic colon andpart of the rectum, the iliac artery and vein. The iliolumbar, superiorgluteal, and sciatic vessels also bear a close relation to the plexus. Thesacral plexus gives off two sets of branches, viz., collateral and terminal. The collateral branches are divided into anterior and posterior. Theanterior collateral branches contribute to the pudendal plex
. Regional anesthesia : its technic and clinical application . urface of the sacrum, from which it is sepa-rated by the pyriformis muscle, and is covered by the parietal portionof the pelvic fascia. In front of it lie the ureter, the pelvic colon andpart of the rectum, the iliac artery and vein. The iliolumbar, superiorgluteal, and sciatic vessels also bear a close relation to the plexus. Thesacral plexus gives off two sets of branches, viz., collateral and terminal. The collateral branches are divided into anterior and posterior. Theanterior collateral branches contribute to the pudendal plexus and includemuscular and articular branches, suppl3ang the quadratus femoris, theobturator internus, the gemelli, the hamstrings and the adductormagnus, and the posterior portion of the capsular Ugament of the hip- BLOCKING OF SPIXAL NER\TS 255 joint. The posterior collateral branches supply the pyriformis and theglutei muscles, the tensor fascias femoris, and the short head of thebiceps. The terminal branch of the sacral plexus is the great sciatic :i jx^x ^^ perxDcaX Fig. 195.—Sacral plex Pudendal Plexus.—The pudendal plexus is formed by the union ofthe anterior collateral branches of the sacral plexus (first, second, andthird sacral nerves), the fourth and fifth sacral nerves and the coccygealnerve, to which are added contributions from the sympathetic pudendal plexus is situated on the posterior wall of the pelvis and 256 REGIONAL ANESTHESIA is more the continuation of the sacral plexus than a distinct divides into visceral and muscular branches and gives rise to thesmall sciatic nerve, the pudic nerve, and the sacrococcygeal plexus. (a) The visceral branches are derived chiefly from S^, S, and S*.They unite with fibers borrowed from the hypogastric plexus and fromthe sacral portion of the sympathetic chain to form the pelvic plexus,an elaborate network containing mmierous small ganglia, from whichare given off the hemorrhoidal, vesical
Size: 1390px × 1797px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidregionalanes, bookyear1922
