Posterior Abdominal Muscles

Question 1

The quadratus lumborum is implicated in the formation of which ligament?

Answer 1

the iliolumbar ligament

Question 2

What is the insertion of the quadratus lumborum?

Answer 2

transverse tubercles of the transverse process L1-L4 and 12th rib

Question 3

What will innervate the quadratus lumborum?

Answer 3

the ventral rami of T12 and L1-L3 or L4 spinal nerves

Question 4

What is the origin of the psoas major?

Answer 4

vertebral bodies of T12, L1-L5, S1 and transverse processes of L1-L5

Question 5

What will innervate the psoas major?

Answer 5

primarily the ventral rami of L2 and L3, may include ventral rami of L1 and L4 spinal nerves

Question 6

What is the origin of psoas minor?

Answer 6

vertebral bodies T12, L1

Question 7

What will innervate the psoas minor?

Answer 7

the ventral ramus of L1 spinal nerve

Question 8

What will innervate the illiacus?

Answer 8

the femoral nerve, primarily the ventral rami of L2 and L3