Intermediate Back Muscles

Question 1

serratus posterior superior origin?

Answer 1

lower end of lig nuchae and SPs of C7-T2/3

Question 2

insertion of serratus posterior superior?

Answer 2

ribs 2-5 lateral to angle

Question 3

serratus posterior superior innervation?

Answer 3

first four intercostal nerves

Question 4

what are the first four intercostal nerves?

Answer 4

ventral rami of first four thoracic nerves

Question 5

blood supply of sps?

Answer 5

highest intercostal artery, posterior intercostal arteries

Question 6

action of sps?

Answer 6

elevate ribs during inspiration

Question 7

origin of serratus posterior inferior?

Answer 7

SPs of T10-L2

Question 8

insertion of serratus posterior inferior?

Answer 8

lower 3-4 ribs lateral to angles

Question 9

innervation of spi?

Answer 9

lowest 4 intercostal nerves

Question 10

what are the lowest four intercostal nerves?

Answer 10

ventral rami of lower thoracic

Question 11

what is the blood supply of serratus posterior inferior?

Answer 11

posterior intercostal arteries

Question 12

what is the action of spi?

Answer 12

depresses lower ribs down and back during inspiration