Serratus posterior inferior

Question 1

origin of serratus posterior inferior

Answer 1

SPs of T10-L2

Question 2

insertion of serratus posterior inferior

Answer 2

lower 3-4 ribs lateral to angles

Question 3

innervation of serratus posterior inferior

Answer 3

lowest 4 intercostal nerves (ventral rami T8-T11)

Question 4

blood supply of serratus posterior inferior

Answer 4

posterior intercostal arteries

Question 5

action of serratus posterior inferior

Answer 5

depresses lower ribs down and back during inspiration