Intercostals (External, Internal, Innermost)

Question 1

Intercostals (ORIGIN)

Answer 1

Inferior border of the rib above

Question 2

Intercostals (INSERTION)

Answer 2

Superior border of the rib below

Question 3

Intercostals (INNERVATION)

Answer 3

Intercostal nerves (T1-T11)

Question 4

Intercostals (BLOOD SUPPLY)

Answer 4

Intercostal arteries

Question 5

Intercostals (ACTION)- external, internal and innermost (same)

Answer 5

External: Elevate ribs during inspiration
Internal and Innermost: Depress ribs during forced expiration