Select Muscles of the Thorax

Question 1

What is the origin of the levator costarum brevis?

Answer 1

transverse tubercles of transverse processes from C7, T1-T11

Question 2

What is the insertion of the levator costarum brevis?

Answer 2

between the costal tubercle and costal angle of the rib below

Question 3

Contraction of the levator costarum brevis will result in what movements?

Answer 3

• elevate the rib

- collectively may laterally flex and rotate trunk

Question 4

What will innervate the levator costarum brevis?

Answer 4

dorsal rami of T1-T12 spinal nerves

Question 5

What is the origin of the levator costarum longus?

Answer 5

transverse tubercles of transverse processes from T7-T10

Question 6

What is the insertion of the levator costarum longus?

Answer 6

near costal angle of rib 9-12

Question 7

Contraction of the levator costarum longus will result in what movements?

Answer 7

• elevate rib

- collectively may laterally flex and rotate trunk

Question 8

What will innervate the levator costarum longus?

Answer 8

dorsal rami of lower thoracic spinal nerves

Question 9

What is the origin of the serratus posterior superior?

Answer 9

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

Question 10

What is the insertion of the serratus posterior superior?

Answer 10

upper outer border of ribs 2-5

Question 11

Contraction of the serratus posterior superior will result in what movements?

Answer 11

elevate the upper outer border of ribs 1-5 in inspiration

Question 12

What will innervate the serratus posterior superior?

Answer 12

ventral rami of T2-T5 spinal nerves, intercostal nerves

Question 13

What is the origin of the serratus posterior inferior?

Answer 13

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

Question 14

What is the insertion of the serratus posterior inferior?

Answer 14

inferior outer border of ribs 9-12

Question 15

Contraction of the serratus posterior inferior will result in what movements?

Answer 15

draws lower 4 ribs down and back, forced inspiration

Question 16

What will innervate the serratus posterior inferior?

Answer 16

• ventral rami of T9-T11, the intercostal nerves

- ventral ramus of T12, the subcostal nerve