Flexors of the Trunk

Question 1

Rectus Abdominus Origin

Answer 1

Pubic Crest

Question 2

Rectus Abdominus Insertion

Answer 2

Cartilage of 5th-7th ribs & xiphoid process

Question 3

Rectus Abdominus Nerve

Answer 3

Lateral flexion

Question 4

Rectus Abdominus Action

Answer 4

T7 – T12 Intercostal nerves

Question 5

External Obliques Origin

Answer 5

Lateral surface of 5th- 12th rib

Question 6

External Obliques Insertion

Answer 6

Abdominal aponeurosis & lower 3 ribs & iliac crest

Question 7

External Obliques Nerve

Answer 7

Rotation of trunk, expiration & lateral flexion

Question 8

External Obliques Action

Answer 8

Anterior primary rami of the lower 6 thoracic nerves T7 to T12

Question 9

Internal Obliques Origin

Answer 9

Iliac crest & thoracolumbar fascia & inguinal ligament

Question 10

Internal Obliques Insertion

Answer 10

Same as external: Abdominal aponeurosis & lower 3 ribs & iliac crest

Question 11

Internal Obliques Nerve

Answer 11

Rotation of trunk, expiration & lateral flexion

Question 12

Internal Obliques Action

Answer 12

Anterior primary rami of the lower 6 thoracic nerves T7 to T12, also the L1 nerve

Question 13

Psoas Major Origin

Answer 13

T12-L4 transverse processes vertebral bodies & disks

Question 14

Psoas Major Insertion

Answer 14

Lessor trochanter

Question 15

Psoas Major Nerve

Answer 15

N/A

Question 16

Psoas Major Action

Answer 16

Anterior rami of L1, L2, L3

Question 17

Psoas Minor Origin

Answer 17

Same as major: T12-L4 transverse processes vertebral bodies & disks

Question 18

Psoas Minor insertion

Answer 18

Same as major: Lessor trochanter

Question 19

Psoas Minor Nerve

Answer 19

N/A

Question 20

Psoas Minor Action

Answer 20

Lumbar plexes L1 – L13