Quadratus Lumborum

Question 1

Quadratus Lumborum (ORIGIN)

Answer 1

Iliac crest and iliolumbar ligament

Question 2

Quadratus Lumborum (INSERTION)

Answer 2

Inferior border of the 12th rib and transverse processes of L1-L4

Question 3

Quadratus Lumborum (INNERVATION)

Answer 3

Ventral rami of T12-L4 spinal nerves

Question 4

Quadratus Lumborum (BLOOD SUPPLY)

Answer 4

Lumbar arteries, subcostal artery, and iliolumbar artery

Question 5

Quadratus Lumborum (ACTION)

Answer 5

Lateral flexion of the vertebral column.
Extension of the lumbar spine.
Fixes the 12th rib during respiration.