Abdominal Musculature

Question 1

Rectus abdominis (abs)

Pubic bone up to ribs 5-7

Answer 1

Integrated function:
Eccentrically decelerates spinal extension, lateral flexion, and rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

Question 2

External oblique (abs)

From ribs 4-12 down into iliac crest of pelvis on both sides of the body

Answer 2

Integrated function:
Eccentrically decelerates spinal extension, lateral flexion, and rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

Question 3

Internal oblique (abs)

Anterior (front) iliac crest up to ribs 12-9

Answer 3

Integrated function:
Eccentrically decelerates spinal extension, rotation, and lateral flexion
Isometrically stabilizes the lumbo-pelvic-hip complex

Question 4

Transverse abdominis (abs)

From ribs 7-12, anterior (front)2/3 iliac crest of pelvis down to hip

Answer 4

Integrated function:

Isometrically stabilizes the lumbo-pelvic-hip complex

Question 5

Diaphragm (abs)

Inside the middle of rib cage 6-12

Answer 5

Integrated function:

Stabilizes the lumbo-pelvic-hip complex