Layer 2 Back Muscles

Question 1

Which muscles are in the second layer of the back?

Answer 1

Rhomboid major and minor + levator scapulae

Question 2

What is the origin of the rhomboid major?

Answer 2

Spinous processes of T2-5

Question 3

What is the rhomboid major insertion?

Answer 3

Medial border of scapula inferior to scapular spine

Question 4

What action do the rhomboid major and minor muscles perform?

Answer 4

Retract and elevate the scapula, rotate the glenoid cavity inferiorly

Question 5

What are the rhomboid major and minor as well as levator scapula muscles innervated by?

Answer 5

Dorsal scapular nerve

Question 6

What is the origin for rhomboid minor?

Answer 6

Spinous processes of C7-T1, lower part of the Ligamentum nuchae

Question 7

What is the insertion for rhomboid minor?

Answer 7

Medial border of scapula at scapular spine

Question 8

What is the origin of levator scapula?

Answer 8

Posterior tubercles of transverse process of C1-4

Question 9

What is the insertion for the levator scapula?

Answer 9

Medial border of scapula superior to scapular spine

Question 10

What is the levator muscle’s action?

Answer 10

Elevate scapula and rotate glenoid cavity inferiorly