Anterolateral Abdominals

Question 1

What are the 5 muscles of the abdominal wall?

Answer 1

1.) external oblique
2.) internal oblique
3.) transverse abdominis
4.) rectus abdominis
5.) pyramidalis

Question 2

Origin for external oblique

Answer 2

Ribs 5-12

Question 3

Origin of internal oblique

Answer 3

.Thoracolumbar fascia
. Iliac crest ( anterior 2/3)
. Inguinal ligament (lateral 2/3)

Question 4

Origin of transverse abdominis

Answer 4

.thoracolumbar fascia
.iliac crest ( anterior 2/3)
.inguinal ligament ( lateral 1/3)
.inner surface of lower 6 costal. Cartilages

Question 5

Origin of Rectus abdominis

Answer 5

.pubic crest
.pubic symphysis

Question 6

Origin for pyramidalis

Answer 6

Pubis
Pubic symphysis

Question 7

Insertion of external oblique

Answer 7

.xiphoid
.linea alba
.pubic crest
.pubic tubercle
.iliac crest ( anterior 1/2)
Via apponeurosis

Question 8

Insertion of internal oblique

Answer 8

.xiphoid
.linea alba
.pubis symphysis
* via aponeurosis*
Ribs 10-12

Question 9

Insertion for transverse abdominis

Answer 9

.xiphoid
.linea alba
.symphysis pubis
via aponeurosis

Question 10

Insertion for rectus abdominis

Answer 10

Xiphoid process
5/6/7th costal cartilages

Question 11

Insertion for pyramidalis

Answer 11

Linea alba

Question 12

What 3 nerves innervate the abdominal wall?

Answer 12

1.) ventral rami of T7-T12
2.) iliohypogastric
3.) ilioinguinal

Question 13

What 2 muscles are not innervated by the iliohypogastric or ilioinguinal

Answer 13

1.) rectus abdominis
2.) pyramidalis

Question 14

What muscle is only innervated by T12?

Answer 14

Pyramidalis

Question 15

What is the only muscle of the abdominal wall that does not contribute to forced expiration?

Answer 15

Pyramidalis