Extrinsic Back Muscles

Question 1

Trapezius origin

Answer 1

Superior nuchal line
Occipital protuberance
Ligamentum nuchae
Spinous processes C7-T12

Question 2

Trapezius insertion

Answer 2

Upper: lateral third of clavicle
Middle: acromion
Lower: medial end of scapula spine

Question 3

Trapezius action

Answer 3

Adduct scapula

Fixed scapula: extend head and neck, laterally flex head/neck, rotate vertebrae

Question 4

Upper trapezius action

Answer 4

Elevate scapula
Adduct/retract scapula
Rotate scapula upward
Rotate head/neck

Question 5

Middle trapezius action

Answer 5

Adduct/retract scapula

Question 6

Lower trapezius action

Answer 6

Depress scapula
Adduct scapula
Rotate upward(axis of rotation)

Question 7

Trapezius nerve

Answer 7

Roots of spinal accessory nerve (11)

Spinal nerves C3,4- pain/proprioception

Question 8

Trapezius blood supply

Answer 8

Transverse cervical artery

Question 9

Latissimus dorsi origin

Answer 9

T7-T12
Lumbar fascia 
Iliac crest (posterior 1/4)
Inferior ribs 3-4
Scapular inferior angle

Question 10

Latissimus dorsi insertion

Answer 10

Floor of intertubercular groove

Question 11

Latissimus dorsi action

Answer 11

Adduct arm
(Hyper)extend arm
Medial rotation of arm
Excessive expiration 
FIXED HUMEROUS: raise body or lower scapula

Question 12

Latissimus dorsi nerve

Answer 12

Thoracodorsal (C6-8)

Question 13

Latissimus dorsi blood supply

Answer 13

Thoracodorsal artery

Question 14

Rhomboid minor origin

Answer 14

Inferior ligamentum nuchae

Spinous processes C7-T1

Question 15

Rhomboid minor insertion

Answer 15

Vertebral scapula border adjacent to root of scapular spine

Question 16

Rhomboid major origin

Answer 16

Spinous processes T2-5

Question 17

Rhomboid major insertion

Answer 17

Vertebral border of scapula between spine and inferior angle

Question 18

Rhomboid action

Answer 18

Adduct/retract scapula
Elevate scapula
Rotate scapula downward

Question 19

Rhomboid nerve

Answer 19

Dorsal scapular (C4-5)

Question 20

Rhomboid blood supply

Answer 20

Dorsal scapular

Question 21

Levator scapula origin

Answer 21

Transverse processes of C1-4

Question 22

Levator scapula insertion

Answer 22

Vertebral border of scapula above spine(superior angle)

Question 23

Levator scapula action

Answer 23

Elevate scapula
Rotate scapula downward
Adduct scapula

Question 24

Levator scapula nerve

Answer 24

Dorsal scapular (C5 only)
Anterior rami C3-4

Question 25

Levator scapula blood supply

Answer 25

Dorsal scapular artery

Question 26

Serratus posterior superior origin

Answer 26

Lower nuchal ligament

C7-T2

Question 27

Serratus posterior superior insertion

Answer 27

Upper ribs 2-4 near angle

Question 28

Serratus posterior superior action

Answer 28

Elevate upper ribs

Proprioception

Question 29

Serratus posterior superior nerve

Answer 29

Intercostals (anterior/ventral rami) 2-5

Question 30

Serratus posterior superior blood supply

Answer 30

Intercostal artery

Question 31

Serratus posterior inferior origin

Answer 31

T10-L2

Question 32

Serratus posterior inferior insertion

Answer 32

Lower border last 3-4 ribs

Question 33

Serratus posterior inferior action

Answer 33

Proprioception
Depress ribs
Stabilize ribs to prevent diaphragm movement upward

Question 34

Serratus posterior inferior nerve

Answer 34

Intercostals (ventral rami) 9-12

Question 35

Serratus posterior inferior blood supply

Answer 35

Intercostal artery