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Spinal Anatomy I - Exam 3 > Select Muscles of the Thorax > Flashcards

Flashcards in Select Muscles of the Thorax Deck (16):
1

What is the origin of the levator costarum brevis?

transverse tubercles of transverse processes from C7, T1-T11

2

What is the insertion of the levator costarum brevis?

between the costal tubercle and costal angle of the rib below

3

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

- elevate the rib
- collectively may laterally flex and rotate trunk

4

What will innervate the levator costarum brevis?

dorsal rami of T1-T12 spinal nerves

5

What is the origin of the levator costarum longus?

transverse tubercles of transverse processes from T7-T10

6

What is the insertion of the levator costarum longus?

near costal angle of rib 9-12

7

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

- elevate rib
- collectively may laterally flex and rotate trunk

8

What will innervate the levator costarum longus?

dorsal rami of lower thoracic spinal nerves

9

What is the origin of the serratus posterior superior?

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

10

What is the insertion of the serratus posterior superior?

upper outer border of ribs 2-5

11

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

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

12

What will innervate the serratus posterior superior?

ventral rami of T2-T5 spinal nerves, intercostal nerves

13

What is the origin of the serratus posterior inferior?

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

14

What is the insertion of the serratus posterior inferior?

inferior outer border of ribs 9-12

15

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

draws lower 4 ribs down and back, forced inspiration

16

What will innervate the serratus posterior inferior?

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

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