ANAT30008 Lecture Notes - Lecture 20: Superior Rectal Artery, Superior Mesenteric Vein, Inferior Mesenteric Vein

• School: University of Melbourne
• Department: Anatomy and Neuroscience
• Course: ANAT30008

Document Summary

The inferior mesenteric artery gives off left colic artery and colic and sigmoid branches to supply the remainder of the colon. Changes its name to the superior rectal artery which supplies the superior of the rectum: blood from the git drains into the portal system. The superior mesenteric vein joins with the splenic vein and drain into the portal vein. The inferior mesenteric vein joins with the splenic vein. Parasympathetic from vagus nerve to the foregut and midgut and from pelvic splanchnics to the hindgut. Visceral afferents for everything until the mid-sigmoid follows sympathetic fibres, so refers pain to t6-l2 dermatomes, i. e midline of anterior abdominal wall (t6-9 foregut, t8-12 midgut, t12-l2 hindgut). Visceral afferents for everything after the mid-sigmoid follow parasympathetic fibres, so refers pain to s2-4 dermatomes, in the perineal region. Pelvis: the iliopectineal line, the pelvic inlet, the width from the acetabulum to the pubic symphysis, females: width> acetabulum, males: wdith=acetabulum.