Accessory Muscles of Respiration

Question 1

Serratus Posterior Superior (origin)

Answer 1

ligamentum nuchae; spinous processes of C7-T3

Question 2

Serratus Posterior Superior (insertion)

Answer 2

Superior aspect of rib 2-4

Question 3

Serratus Posterior Superior (action)

Answer 3

Elevation of ribs

Question 4

Serratus Posterior Superior (innervation)

Answer 4

Ventral rami of upper thoracic nerves

Question 5

Serratus Posterior Inferior (origin)

Answer 5

Spinous processes of T11-L2

Question 6

Serratus Posterior Inferior (insertion)

Answer 6

inferior aspect of ribs 9-12

Question 7

Serratus Posterior Inferior (action)

Answer 7

depresses ribs

Question 8

Serratus Posterior Inferior (innervation)

Answer 8

Ventral rami of lower thoracic nerves

Question 9

Levatores costarum (origin)

Answer 9

Transverse processes C7-T11

Question 10

Levatores costarum (insertion)

Answer 10

Corresponding rib at superior border, between costal angle and tubercle

Question 11

Levatores costarum (action)

Answer 11

assists with deep inspiration

Question 12

Levatores costarum (innervation)

Answer 12

dorsal rami