Abdomen & pelvis

Question 1

External Oblique

Answer 1

Attachments
External surface of ribs 5-12
Linea alba, pubic tubercle, iliac crest

Actions
Compress and support abdominal viscera
Flex trunk
Rotate trunk

Question 2

Internal Oblique

Answer 2

Attachments
Thoracolumbar fascia, iliac crest, connective tissue deep to inguinal ligament
Ribs 10-12, linea alba, pectin pubis

Actions
Compress and support abdominal viscera
Flex trunk
Rotate trunk

Question 3

Rectus Abdominis

Answer 3

Attachments
Pubic symphysis, pubic crest
Xiphoid process, costal cartilages 5-7

Actions
Flex trunk
Compress abdominal viscera
Stabilizes pelvis (and controls pelvic tilt)

Question 3

Transversus Abdominis

Answer 3

Attachments
Costal cartilages 7-12, thoracolumbar fascia, iliac crest, connective tissue deep to inguinal ligament
Linea alba, pectin pubis, pubic crest

Actions
Compress and support abdominal viscera

Question 4

Quadratus Lumborum

Answer 4

Attachments
Rib 12, transverse processes of lumbar vertebrae
Iliolumbar ligament, iliac crest

Actions
Extends vertebral column
Laterally flexes vertebral column
Stabilizes 12th rib during inspiration