Abdominal Muscles

Question 1

Rectus abdominus origin

Answer 1

Pubic symphysis & pubic crest

Question 2

Rectus abdominus insertion

Answer 2

Xiphoid process, costal cartilages 5-7

Question 3

Rectus abdominus action

Answer 3

Flexes trunk, compresses abdominal viscera

Question 4

Rectus abodominus innervation

Answer 4

Ventral rami

Question 5

Rectus abdominus blood supply

Answer 5

Superior and inferior epigastric arteries

Question 6

Internal oblique origin

Answer 6

Thoracolumbar fascia, anterior 2/3 iliac crest, lateral half of inguinal ligament

Question 7

Internal oblique insertion

Answer 7

Inferior border of ribs 10-12

Question 8

Internal oblique action

Answer 8

Compresses and supports abdominal viscera, flexes and rotates trunk

Question 9

Internal oblique innervation

Answer 9

Ventral rami of six inferior thoracic and first lumbar nerves

Question 10

Internal oblique blood supply

Answer 10

Superior and inferior epigastric and deep circumflex iliac arteries

Question 11

External oblique origin

Answer 11

External surfaces of ribs 5-12

Question 12

External oblique insertion

Answer 12

Linda alba, pubic tubercle, anterior half of iliac crest

Question 13

External oblique action

Answer 13

Flex and rotate trunk

Question 14

External oblique innervation

Answer 14

Ventral rami of six inferior thoracic nerves

Question 15

External oblique blood supply

Answer 15

Superior and inferior epigastric arteries

Question 16

Quadratus lumborum origin

Answer 16

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

Question 17

Quadratus lumborum insertion

Answer 17

Iliolumbar ligament, internal lip of iliac crest

Question 18

Quadratus lumborum action

Answer 18

Extends and laterally flexes vertebral column, fixes 12th rib during inspiration

Question 19

Quadratus lumborum innervation

Answer 19

Ventral rami

Question 20

Quadratus lumborum blood supply

Answer 20

Iliolumbar artery

Question 21

Psoas minor origin

Answer 21

Vertebral margins of T12-L1 vertebrae, corresponding intervertebral disk

Question 22

Psoas minor insertion

Answer 22

Pectineal line of pelvis

Question 23

Psoas minor action

Answer 23

Flexes pelvis on vertebral column

Question 24

Psoas minor innervation

Answer 24

Ventral rami of first lumbar nerve

Question 25

Psoas minor blood supply

Answer 25

Lumbar branch of Iliolumbar artery

Question 26

Psoas major origin

Answer 26

All bodies and transverse processes of all lumbar vertebrae

Question 27

Psoas major insertion

Answer 27

Lesser trochanter

Question 28

Psoas major action

Answer 28

Flex hip

Question 29

Psoas major innervation

Answer 29

Lumbar nerves 2-4

Question 30

Psoas major blood supply

Answer 30

Iliolumbar artery

Question 31

Transverse abdominus origin

Answer 31

Thoracolumbar fascia, lateral part of inguinal ligament, tips of lower 6 ribs, anterior iliac crest

Question 32

Transverse abdominus insertion

Answer 32

Aponeurosis into linea alba

Question 33

Transverse abdominus action

Answer 33

Compression of the abdominal cavity

Question 34

Transverse abdominus innervation

Answer 34

Lower intercostal nerves, L1

Question 35

Transverse abdominus blood supply

Answer 35

Posterior intercostal and subcostal arteries, superior and inferior epigastric arteries