. Anatomy, descriptive and applied. Anatomy. THE INTERNAL ILIAC ARTERY 677 The sciatic artery (a. ghitaea inferior) (Fig. 477), the larger of the two terminal branches of tiie anterior trunk of the internal iliac, is distributed chiefly on the buttock and back of the thigh. It passes down to the lower part of the great sacrosciatic foramen behind the internal pudic artery, resting on the sacral plexus of nerves and Pyriformis muscle, and escapes from the pelvis through this foramen between the Pyriformis and Coccygeus. ' It then descends in the interval between the tro- chanter major and tuber
. Anatomy, descriptive and applied. Anatomy. THE INTERNAL ILIAC ARTERY 677 The sciatic artery (a. ghitaea inferior) (Fig. 477), the larger of the two terminal branches of tiie anterior trunk of the internal iliac, is distributed chiefly on the buttock and back of the thigh. It passes down to the lower part of the great sacrosciatic foramen behind the internal pudic artery, resting on the sacral plexus of nerves and Pyriformis muscle, and escapes from the pelvis through this foramen between the Pyriformis and Coccygeus. ' It then descends in the interval between the tro- chanter major and tuberosity of the ischium, accompanied by the sciatic nerves, and covered by the Gluteus maxi- mus, and is continued down the back of the thigh supplying the skin, and anastomosing with branches of the perfora- ting arteries. Within the pelvis it distrib- utes branches to the Pyriformis, Coccygeus, and Levator ani muscles; some hemorrhoidal branches, which supply the rectum, and occasionally take the place of ithe middle hemor- rhoidal artery; and vesical branches to the base and neck of the bladder, seminal vesicles, and prostate gland. Outside the pelvis it gives off the fol- lowing branches: Muscular. Coccygeal. Comes nervi ischiadic!. Anastomotic. Articular. Cutaneous. The muscular branches sup- ply the Gluteus maximus, anastomosing with the gluteal artery in the substance of the muscle; the External rotators, anastomosing with the internal pudic artery; and the muscles attached to the tuberosity of the ischium, anastomosing with the external branch of the obturator and the internal circumflex arteries. The coccygeal branch runs inward, pierces the great sacrosciatic ligament, and supplies the Gluteus maximus, the integument, and other structures on the back of the coccyx. The comes nervi ischiadic! (a. comitans n. ischiadici) is a long, slender vessel which accompanies the great sciatic nerve for a short distance; it then penetrates it and runs in its substance to the lower par
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
