Superficial Back Muscles

Question 1

What is the MA of the Latissimus Dorsi?

Answer 1

Extension of the shoulder, adduction of the shoulder, internal (medial) rotation of the shoulder, and raises body towards arm when climbing

Question 2

What is the P of the Latissimus Dorsi?

Answer 2

Propelling a wheelchair forward and pushing downwards on the arms of a chair to go from sitting to standing

Question 3

What is the DA of the Latissimus Dorsi?

Answer 3

The floor of the intertubercular sulcus of the humerus

Question 4

What is the PA of the Latissimus Dorsi?

Answer 4

Inferior angle of the scapula, spinous processes of T7-T12, ribs 9-12 or 10-12, thoracolumbar fascia, and iliac crest

Question 5

What is the N for the Latissimus Dorsi?

Answer 5

Thoracodorsal nerve (C6-C8)

Question 6

What is the P of the Trapezius?

Answer 6

Upper and lower fibers reach for an object overhead and middle fibers row a kayak or canoe

Question 7

What is the MA of the Upper Trapezius?

Answer 7

Bilaterally: extension of the head and neck

Unilaterally: laterally flexion of the head and neck to the same side, contralateral rotation of the head and neck, elevation of the scapula, and upward rotation of the scapula

Question 8

What is the MA of the Middle Trapezius?

Answer 8

Adduction of the scapula and stabilization of the scapula

Question 9

What is the MA of the Lower Trapezius?

Answer 9

Depression of the scapula and upward rotation of the scapula

Question 10

What is the PA of the Trapezius?

Answer 10

External occipital protuberance, superior nuchal line, ligamentum nuchae, and spinous processes of C7-T12

Question 11

What is the DA of the Trapezius?

Answer 11

Lateral 1/3 of clavicle, acromion, and spine of scapula

Question 12

What is the N for the Trapezius?

Answer 12

Spinal accessory nerve (CN XI) and ventral ramus C3 and C4 (pain and proprioceptive fibers)

Question 13

What is the P of the Levator Scapulae?

Answer 13

Shrugging shoulders, carrying a briefcase, carrying a backpack on one shoulder

Question 14

What is the MA of the Levator Scapulae?

Answer 14

Unilaterally: elevation of the scapula and downward rotation of the scapula

Question 15

What is the PA of the Levator Scapulae?

Answer 15

Transverse processes of C1-C4

Question 16

What is the N for the Levator Scapulae?

Answer 16

Cervical nerve (C3 and C4) and dorsal scapular nerve (C4 and C5)

Question 17

What is the DA of the Levator Scapulae?

Answer 17

The medial border of the scapula between the superior angle and the root of the scapular spine

Question 18

What is the P of the Rhomboids?

Answer 18

Reaching into back pocket

Question 19

What is the MA of the Rhomboids?

Answer 19

Adduction of the scapula, downward rotation of the scapula, and fixes the scapula to the thoracic wall

Question 20

What is the PA of the Rhomboid Minor?

Answer 20

The spinous processes of C7 and T1 and nuchal ligament

Question 21

What is the PA of the Rhomboid Major?

Answer 21

The spinous processes of T2-T5

Question 22

What is the DA of the Rhomboid Minor?

Answer 22

The medial border of the scapular spine

Question 23

What is the DA of the Rhomboid Major?

Answer 23

The medial border of the scapula between the root of the scapular spine and the inferior angle

Question 24

What is the N for the Rhomboids?

Answer 24

The dorsal scapular nerve (C4 and C5)