Intermediate (respiratory) Back Muscles

Question 1

List all the intermediate (respiratory) muscles

Answer 1

1. Serratus posterior superior

2. Serratus posterior inferior

Question 2

What is serratus posterior superior deep to?

Answer 2

Rhomboid muscles

Question 3

What is serratus posterior inferior deep to?

Answer 3

Latissimus dorsi

Question 4

Function of serratus posterior superior

Answer 4

Elevate ribs

Question 5

Function of serratus posterior inferior

Answer 5

Depress ribs

Question 6

Origin of serratus posterior superior

Answer 6

• Lower portion of ligamentum nuchae

- C7-T3 spinous process

Question 7

Insertion of serratus posterior superior

Answer 7

• Upper border of 2nd - 5th rib

Lateral to their costal angles

Question 8

Innervation of serratus posterior superior?

Answer 8

• Anterior (ventral) rami of T2-T5 spinal nerves

Question 9

Blood supply of serratus posterior superiority

Answer 9

• intercostal artery (dorsal branch of upper posterior)

Question 10

Origin of serratus posterior inferior

Answer 10

• T11-L3 spinous process

- supra-spinous ligament

Question 11

Insertion of serratus posterior inferior

Answer 11

• Lower border of 9th - 12th rib

Angles of ribs

Question 12

Innervation of serratus posterior inferior

Answer 12

• Anterior (ventral) rami of T9-T12 of spinal nerves

Question 13

Blood supply of serratus posterior inferior

Answer 13

• intercostal artery (dorsal branch of lower posterior)

- Subcostal artery