Muscles That Move The Abdominal Wall

Question 1

External oblique

Answer 1

Origin: outer surfaces of lower 8 ribs

Insertion: outer lip of iliac crest and lines alba

Action: compress abdomen, flexes and rotates vertebral column

Nerve supply: intercostal 7 to 12

Question 2

Internal oblique

Answer 2

Origin: iliac crest and I guitar ligament

Insertion: lower 3 to 4 ribs, lines alba and crest of pubis

Action: compressed abdomen, flexes, and rotates vertebral column

Nerve supply: intercostal nerves 7 to 12

Question 3

Transversus abdominis

Answer 3

Origin: costal cartilage of lower 6 ribs, processes of lumbar vertebrae, lip of iliac crest, and inguinal ligament

Insertion: lines alba and crest of pubis

Action: compress abdomen, flexes and rotates vertebral column

Nerve supply: intercostal nerves 7-12

Question 4

Rectus abdominis

Answer 4

Origin: crest of pubis and pubic symphysis

Insertion: xiphoid process of sternum and ribs 5-7

Action: compress abdomen, flexes and rotates vertebral column

Nerve supply: intercostal nerves 7-12