Back Muscles

Question 1

What are the muscles of the back derived from?

Answer 1

Paraxial mesoderm

Question 2

What layer of the back are the trapezius and latissimus dorsi a part of?

Answer 2

Extrinsic Superficial

Question 3

What layer of the back are the levator scapulae, rhomboid major and minor, and serrates posterior superior and inferior a part of?

Answer 3

Extrinsic intermediate

Question 4

What layer of the back are the splenius capitis and splenius cervicis a part of?

Answer 4

Intrinsic Superficial

Question 5

What layer of the back is the erector spinae a part of?

Answer 5

Intrinsic intermediate

Question 6

What layer of the back are the interspinales, rotatores costar, intertransversarii, multifidus, and semispinalis capitis and cervicis a part of?

Answer 6

Intrinsic Deep

Question 7

What is the most medial of back muscles?

Answer 7

Multifidis

Question 8

Which compartment of the intertransversarii is innervated by the dorsal rami?

Answer 8

Medial compartment

Question 9

Which compartment of the intertransversarii is innervated by the ventral rami?

Answer 9

Lateral compartment

Question 10

What is the main function of these small intrinsic muscles?

Answer 10

Serve as mechanoreceptors