Muscles of Abdominal Wall and Inguinal Canal - Exam 2

Question 1

external oblique (hands in pockets) origin

Answer 1

external ribs 5-12

Question 2

external oblique insertion

Answer 2

linea alba, anterior iliac crest, pubic tubercle

Question 3

external oblique action

Answer 3

bilateral forward and ipsilateral flexion, contralateral rotation, compresses and supports abdominal viscera

Question 4

internal oblique (hands in gloves) origin

Answer 4

thoracolumbar fascia and anterior iliac crest

Question 5

internal oblique insertion

Answer 5

ribs 10-12, linea alba, pubis

Question 6

internal oblique actions

Answer 6

ipsilateral flexion, ipsilateral rotation, bilateral forward flexion, compresses and supports abdominal viscera

Question 7

transversus abdominus origin

Answer 7

costal cartilages of ribs 7-12, iliac crest, inguinal ligament

Question 8

transversus abdominus insertion

Answer 8

linea alba, pubic crest, aponeurosis of internal oblique

Question 9

transversus abdominus action

Answer 9

compression of abdominal viscera

Question 10

rectus abdominus origin

Answer 10

pubic symphysis, pubic crest

Question 11

rectus abdominus insertion

Answer 11

xiphoid process, costal cartilages of ribs 5-7

Question 12

rectus abdominus action

Answer 12

bilateral forward flexion, pelvic tilt, compression of abdominal viscera

Question 13

rectus sheath

Answer 13

aponeurosis of flat abdominal muscles, transversals fascia and parietal peritoneum

Question 14

rectus sheath superior to arcuate line

Answer 14

anterior to rectus abdominus - ext oblique and part of int oblique aponeurosis
posterior to rectus abdominus - part of int oblique aponeurosis, transversus abdominus, transversalis fascia, parietal peritoneum

Question 15

rectus sheath inferior to arcuate line

Answer 15

ant to rectus abdominus - aponeurosis of ext oblique, int oblique, and transversus abdominus muscles
post to rectus abdominus - transversalis fascia, parietal peritoneum

Question 16

inguinal ligament

Answer 16

made of ext oblique aponeurosis
forms portion of inguinal canal

Question 17

inguinal canal

Answer 17

goes through transversalis fascia (forms deep inguinal ring) and exits the abdomen anteriorly through the superficial inguinal ring in the ext oblique aponeurosis

Question 18

direct inguinal hernia

Answer 18

goes through weakness in abdominal wall and exits through superficial inguinal ring (weakness due to age, older individuals)

Question 19

indirect inguinal hernia

Answer 19

goes through both deep and superficial inguinal ring (usually congenital weakness, younger individuals)