Muscles- Body Wall

Question 1

external intercostal

Answer 1

O: lower margin of upper rib
I: upper margin of lower rib
A: raise ribs during inspiration

Question 2

internal intercostal

Answer 2

O: upper margin of lower rib
I: lower margin of upper rib
A: lower ribs during forced expiration

Question 3

rectus abdominis

Answer 3

O: pubis
I: costal cartilage of ribs 5-7 and xiphoid process
A: flex trunk, compress abdomen, and stabilize pelvis

Question 4

external oblique

Answer 4

O: ribs
I: iliac crest and linea alba
A: flex trunk, compress abdomen, and stabilize pelvis

Question 5

internal oblique

Answer 5

O: iliac crest
I: ribs
A: flex trunk, compress abdomen, and stabilize pelvis

Question 6

transverse abdominis

Answer 6

A: compress abdomen

Question 7

quadratus lumborum (QL)

Answer 7

O: iliac crest
I: transverse process L1-L4 and 12th rib
A: bearing down, expiration, and stabilize 12th rib

Question 8

diaphragm

Answer 8

O: ribs 7-12, xiphoid process, and body of vertebrae L1-L3
I: central tendon of diaphragm
A: principle of muscle respiration