Select muscles of the thorax

Question 1

What will innervate the levator costarum brevis?

Answer 1

the dorsal rami of T1-T12 spinal nerves

Question 2

What is the origin of the levator costarum longus?

Answer 2

transverse tubercles of transverse processes from T7-T10

Question 3

What is the insertion of the levator costarum longus?

Answer 3

near costal angle of rib 9-rib 12

Question 4

Contraction of levator costarum longus will result in what movements?

Answer 4

elevate the rib, collectively may laterally flex and rotate trunk

Question 5

What is the origin of the serratus posterior superior?

Answer 5

spinous tubercles of spinous processes from C7, T1 and T2, possibly T3

Question 6

What is the insertion of the serratus posterior superior?

Answer 6

upper outer border of rib 2 - rib 5 in inspiration

Question 7

What will innervate the serratus posterior superior?

Answer 7

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

Question 8

What is the origin of the serratus posterior inferior?

Answer 8

spinous tubercles of spinous processes from T11, T12, L1 and L2, possibly L3

Question 9

What is the insertion of the serratus posterior inferior?

Answer 9

inferior outer border of ribs 9-12

Question 10

Contraction of serratus posterior inferior will result in what movements?

Answer 10

draws lower 4 ribs down and back, forced inspiration