Other Deep Back Muscles

Question 1

Which muscles are considered other deep back muscles?

Answer 1

Interspinalis, intertransversarii, levator costarum longus and brevis muscles

Question 2

What is the origin of interspinalis muscle?

Answer 2

Spinous process

Question 3

Where is the interspinalis muscle best developed?

Answer 3

In cervical and lumbar regions

Question 4

What is the insertion of the interspinalis muscle?

Answer 4

Adjacent spinous process

Question 5

What is the interspinalis muscle’s action?

Answer 5

Extend the spine

Question 6

All of these muscles are innervated by what?

Answer 6

Posterior rami

Exception: intertransversarii innervated by anterior rami as well

Question 7

What is the origin of the intertransversarii muscle?

Answer 7

Transverse processes

Question 8

What is the insertion for the intertransversarii muscle?

Answer 8

Adjacent TPs

Question 9

What is the action of the intertransversarii muscle?

Answer 9

Laterally flex the spine

Question 10

What is the origin for levator costarum longus?

Answer 10

Transverse processes C7-T11

Question 11

What does the levator costarum longus muscle insert on?

Answer 11

2nd rib inferior to origin

Question 12

What is the origin of levator costarum brevis?

Answer 12

TP C7-T11

Question 13

What is the insertion site for levator costarum brevis?

Answer 13

Adjacent rib inferior to origin

Question 14

What is the action of both levator costarum brevis and longus?

Answer 14

Elevate ribs