Abdominal wall muscles

Question 1

Origin of medial head, rectus abdominis?

Answer 1

Anterior region of pubic symphysis

Question 2

Insertion of rectus abdominis?

Answer 2

Cartilages of 5th to 7th ribs, xiphoid process of sternum

Question 3

Innervation of rectus abdominis?

Answer 3

Intercostal n. (T5-T12)

Question 4

Actino of rectus abdominis?

Answer 4

Flexes trunk, compresses abdomen, stabilizes pelvis

Question 5

Origin of external oblique?

Answer 5

5th to 12th ribs (outer surface)

Question 6

Insertion external oblique?

Answer 6

Linea alba, pubic tubercle, anterior iliac crest

Question 7

Innervation external oblique?

Answer 7

Intercostal n. (T7-T12)

Question 8

Action of Internal and External oblique?

Answer 8

Unilateral: Ipsilateral flexion of trunk, contralateral rotation of trunk

Bilateral: flexes trunk, compresses abdomen, stabilizes pelvis

Question 9

Origin of internal oblique?

Answer 9

Thoracolumbar fascia (deep layer), iliac crest (intermediate line), anterior superior iliac spine, iliopsoas fascia

Question 10

Insertion of internal oblique?

Answer 10

10th to 12th ribs (lower borders), linea alba (anterior and posterior layers)

Question 11

Innervation of internal oblique and transversus abdominis?

Answer 11

Intercostal n. (T7-T12)
Iliohypogastric n.
Ilioinguinal n.

Question 12

Origin of Transversus abdominis?

Answer 12

7th to 12th costal cartilages (inner surfaces), thoracolumbar fascia (deep layer), iliac crest, anterior superior iliac spine (inner lip), Iliopsoas fascia

Question 13

Insertion of transversus abdominis?

Answer 13

Linea alba, pubic crest

Question 14

Action of transversus abdominis?

Answer 14

Unilateral: ipsilateral rotation of trunk

Bilateral: compresses abdomen

Question 15

Origin of lateral head, rectus abdominis?

Answer 15

Crest of pubis to pubic tubercle