Muscles of abdomen

Question 1

Origin of external obliques

Answer 1

Lower 8 ribs

Question 2

Insertion of external obliques

Answer 2

Linea Alba
Pubic crest and tubercle
Anterior superior illiac spine (ASIS)
1/2 of iliac crest

Question 3

Action of External obliques

Answer 3

Flexes and laterally bends trunk

Question 4

Origin of internal obliques

Answer 4

Thoracolumbar fascia
Anterior 2/3 of iliac crest
Lateral 2/3 of inguinal ligament

Question 5

Insertion of internal obliques

Answer 5

Lower 3 or 4 ribs
Linea alba
Pubic crest

Question 6

Action of internal obliques

Answer 6

Flexes and laterally bends trunk

Question 7

Origin of transverse abdominis

Answer 7

Lower 6 ribs
Thoracolumbar fascia
Anterior 3/4 of iliac crest, lateral 1/3 of inguinal ligament

Question 8

Insertion of Transverse Abdominus

Answer 8

Linea alba
Pubic crest
Pecten pubis

Question 9

Action of Transverse Abdominus

Answer 9

Flexes and laterally bends the trunk

Question 10

Origin of Pyramidalis

Answer 10

Pubis, anterior to the rectus abdominus

Question 11

Insertion of Pyramidalis

Answer 11

Linea Alba

Question 12

Action of Pyramidalis

Answer 12

Draws Linea Alba inferiorly

Question 13

Origin of Quadratus Lumborum

Answer 13

Posterior part of iliac crest
Iliolumbar ligament

Question 14

Insertion of Quadratus Lumborum

Answer 14

TVP’s of L1-L4
12th rib

Question 15

Action of Qudratus Lumborum

Answer 15

Laterally bends the trunk, flexes the 12th rib

Question 16

Origin of Rectus Abdominis

Answer 16

Pubis and pubic symphysis

Question 17

Insertion of Rectus Abdominis

Answer 17

Xiphoid process
Costal Cartilages 5-7

Question 18

Action of rectus abdominis

Answer 18

Flexes the trunk