Posterior Abdominal Muscles, Select Muscles of the Thorax

Question 1

quadratus lumborum is implicated in the formation of which ligament

Answer 1

iliolumbar ligament

Question 2

origin of the psoas major

Answer 2

vertebral bodies T12, L1-5, S1

transverse processes of L1-L5

Question 3

innervates the psoas major

Answer 3

primarily venteral rami of L2& L3, may include ventral rami of L1 & L4 spinal nerves

Question 4

origin of the psoas minor

Answer 4

vertebral bodies T12, L1

Question 5

innervates the psoas minor

Answer 5

ventral ramus of L1 spinal nerve

Question 6

innervation of the iliacus

Answer 6

femoral nerve, primarily the ventral rami of L2 & L3

Question 7

origin of the elevator costarum brevis

Answer 7

transverse tubercles of transverse process of C7, T1-11

Question 8

innervate the levator costarum brevis

Answer 8

dorsal rami of T1-12 spinal nerves

Question 9

origin of levator costarum longus

Answer 9

dorsal rami of the lower thoracic spinal nerves

Question 10

origin of the serratus posterior superior

Answer 10

spinous tubercles of spinous processes form C7, T1 and T12, possibly T3

Question 11

innervates the serratus posterior superior

Answer 11

ventral rami of T2-T5 spinal nerves….intercostal nerves

Question 12

origin of the serratus posterior inferior

Answer 12

spinous tubercles of spinous processes from T11, T12, L1 & L2

Question 13

innervate the serratus posterior inferior

Answer 13

ventral rami of T9-T11, intercostal nerves & ventral ramus of T12, subcostal nerve