Abdominal wall and obliques

Question 1

External abdominal oblique origin

Answer 1

External surfaces of ribs 5 - 12

Question 2

External abdominal oblique insertion

Answer 2

• • Linea alba
  • pubic tubercle
  • ant. half of iliac crest

Question 3

External abdominal oblique innervation

Answer 3

• Thoracoabdominal nerves (T5-T11 spinal nerves)
• Subcostal nerve (ant. ramus of T12)

Question 4

External abdominal oblique function

Answer 4

• Support and compress abdominal viscera
• Flexes and rotates trunk

Question 5

Internal abdominal oblique origin

Answer 5

• Thoracolumbar fascia
• Ant. 2/3 of iliac crest
• Connective tissue deep to lateral third of inguinal ligament

Question 6

Internal abdominal oblique insertion

Answer 6

Inf. border of ribs 10-12, linea alba and pecten pubis via conjoint tendon

Question 7

Internal abdominal oblique innervation

Answer 7

• Thoracoabdominal nerves (ant. rami of t6-t12)
• 1st lumbar nerve

Question 8

Internal abdominal oblique function

Answer 8

• Support and compresses abdominal viscera
• Flexes and rotates trunk

Question 9

Transversus abdominis origin

Answer 9

• 7-12th costal cartilages
• Thoracolumbar fascia
• Iliac crest
• Connective tissue deep to lateral third of inguinal ligament

Question 10

Transversus abdominis insertion

Answer 10

• Linea alba with internal oblique
• pubic crest via conjoint tendon

Question 11

Transversus abdominis innervation

Answer 11

• Thoracoabdominal nerves (ant. rami of T6-T12)
• First lumbar nerve

Question 12

Transversus abdominis function

Answer 12

Support and compresses viscera

Question 13

Rectus abdominis origin

Answer 13

Pubic symphysis and pubic crest

Question 14

Rectus abdominis insertion

Answer 14

Xiphoid process and 5-7th Costal cartilage

Question 15

Rectus abdominis innervation

Answer 15

Thoracoabdominal nerves (ant. rami of T6-T12)

Question 16

Rectus abdominis function

Answer 16

• Flexes trunk
• Compresses abdominal viscera
• Stabilises and controls tilt of pelvis

Question 17

Psoas major origin

Answer 17

Transverse processes, vertebral bodies, intervertebral disk of T12-L5

Question 18

Psoas major insertion

Answer 18

Lesser trochanter of femur

Question 19

Psoas major innervation

Answer 19

ant. rami of L1-L3

Question 20

Psoas major function

Answer 20

Flexion of hip

Question 21

Psoas minor origin

Answer 21

Lateral surface of T12 and L1 vertebral bodies

Question 22

Psoas minor insertion

Answer 22

Superior ramus of pubic bone (pectineal line)

Question 23

Psoas minor innervation

Answer 23

L1 spinal nerve anterior rami

Question 24

Psoas minor function

Answer 24

Stabilizing hip, pelvis and hip joint
assists in spinal flexion

Question 25

Iliacus origin

Answer 25

Iliac fossa

Question 26

Iliacus insertion

Answer 26

Lesser trochanter of femur

Question 27

Iliacus innervation

Answer 27

Femoral nerve

Question 28

Iliacus function

Answer 28

Flexion of hip joint

Question 29

Quadratus lumborum origin

Answer 29

• 12th rib
• Transverse processes of L1-L3 vertebrae

Question 30

Quadratus lumborum insertion

Answer 30

Iliac crest

Question 31

Quadratus lumborum innervation

Answer 31

• Subcostal nerve (T12)
• Ant. rami of L1-L4

Question 32

Quadratus lumborum function

Answer 32

Lateral flexion of spine