Muscles Of The Abdominal Wall

Question 1

Quadratus Lumborum (origin)

Answer 1

Medial half of inferior border of 12th rib, tips of lumbar transverse processes

Question 2

Quadratus Lumborum (insertion)

Answer 2

Iliolumbar ligament
internal lip of iliac crest

Question 3

Quadratus Lumborum (action)

Answer 3

Extends and laterally flexes vertebral column
Fixes 12th rib during inspiration

Question 4

Quadratus Lumborum (nerve)

Answer 4

Ventral rami
(Front nerves)

Question 5

Quadratus Lumborum (blood)

Answer 5

Iliolumbar artery

Question 6

Psoas Minor (origin)

Answer 6

Vertebral margin of T12-L1 vertebrae
Corresponding intervertebral disc

Question 7

Psoas Minor (insertion)

Answer 7

Insert on pectineal line of the superior ramus of pubis

Question 8

Psoas Minor (action)

Answer 8

Flexes pelvis on vertebral column

Question 9

Psoas Minor (nerve)

Answer 9

Ventral rami of first lumbar nerve

Question 10

Psoas Minor (blood)

Answer 10

Lumbar branch of Iliolumbar artery

Question 11

Psoas Major (origin)

Answer 11

Bodies and transverse processes of all lumbar vertebrae

Question 12

Psoas Major (insertion)

Answer 12

Lesser trochanter of femur

Question 13

Psoas Major (action)

Answer 13

Flex hip

Question 14

Psoas Major (nerves)

Answer 14

Lumbar nerves 2-4

Question 15

Psoas Major (blood)

Answer 15

Iliolumbar artery

Question 16

Transversus abdominis (origin)

Answer 16

Thoracolumbar fascia
Lateral part of inguinal ligament
Tips of lower 6 ribs
Anterior iliac crest

Question 17

Transversus abdominis (insertion)

Answer 17

Aponeurosis into linea alba

Question 18

Transversus abdominis (action)

Answer 18

Compression of the abdominal cavity

Question 19

Transversus abdominis (nerve)

Answer 19

Lower intercostal nerves,
L1

Question 20

Transversus abdominis (blood)

Answer 20

Posterior intercostal and subcostal arteries
Superior and inferior epigastric arteries

Question 21

Rectus abdominus (origin)

Answer 21

Pubic symphasis
Pubic crest

Question 22

Rectus abdominus (insertion)

Answer 22

Xiphoid process
Costal cartilages 5-7

Question 23

Rectus abdominus (action)

Answer 23

Flexes trunk
Compresses abdominal viscera

Question 24

Rectus Abdominus (nerve)

Answer 24

Ventral rami of six inferior thoracic nerves

Question 25

Rectus abdominus (blood)

Answer 25

Superior and inferior epigastric arteries

Question 26

Internal oblique (origin)

Answer 26

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

Question 27

Internal oblique (insertion)

Answer 27

Inferior border of ribs 10-12

Question 28

Internal oblique (action)

Answer 28

Compresses and supports abdominal viscera
Flexes and rotates trunk

Question 29

Internal oblique (nerve)

Answer 29

Ventral rami of six inferior thoracic and first lumbar nerves

Question 30

Internal oblique (blood)

Answer 30

Superior and inferior epigastric and deep circumflex iliac arteries

Question 31

External oblique (origin)

Answer 31

External surfaces of ribs 5-12

Question 32

External oblique (insertion)

Answer 32

Linea alba
Pubic tubercle
Anterior half of iliac crest

Question 33

External oblique (action)

Answer 33

Flex and rotates trunk

Question 34

External oblique (nerve)

Answer 34

Ventral rami of six inferior thoracic nerves

Question 35

External oblique (blood)

Answer 35

Superior and inferior epigastric arteries