Superficial Back Musculature

Question 1

Trapezius, origin

Answer 1

occipital protuberance, ligamentum nuchae, spinous processes of C7-T12

Question 2

Trapezius, insertion

Answer 2

upper: lateral third of clavicle
middle: spine of scapula
lower: root of spine of scapula

Question 3

Trapezius, action

Answer 3

upper: elevation of scapula and upward rotation of scapula
middle: retraction of scapula
lower: depression of scapula and upward rotation of scapula

Question 4

Trapezius, nerve supply

Answer 4

spinal accessory nerve

Question 5

Trapezius, blood supply

Answer 5

transverse cervical artery

Question 6

Rhomboid Minor, origin

Answer 6

spinous processes of C7-T1

Question 7

Rhomboid Minor, insertion

Answer 7

root of spine of scapula

Question 8

Rhomboid Minor, action

Answer 8

retraction of scapula and downward rotation of scapula

Question 9

Rhomboid Minor, nerve supply

Answer 9

dorsal scapular nerve

Question 10

Rhomboid Minor, blood supply

Answer 10

dorsal scapular artery

Question 11

Rhomboid Major, origin

Answer 11

spinous processes of T2-T5

Question 12

Rhomboid Major, insertion

Answer 12

vertebral border of scapula from root of spine to inferior angle

Question 13

Rhomboid Major, action

Answer 13

retraction of scapula and downward rotation of scapula

Question 14

Rhomboid Major, nerve supply

Answer 14

dorsal scapular nerve

Question 15

Rhomboid Major, blood supply

Answer 15

dorsal scapular artery

Question 16

Levator Scapulae, origin

Answer 16

transverse processes of C1-C4

Question 17

Levator Scapulae, insertion

Answer 17

vertebral border of scapula from superior angle to root of spine

Question 18

Levator Scapulae, action

Answer 18

elevation of scapula, downward rotation of scapula

Question 19

Levator Scapulae, nerve supply

Answer 19

dorsal scapular nerve

Question 20

Levator Scapulae, blood supply

Answer 20

dorsal scapular artery

Question 21

Latissimus Dorsi, origin

Answer 21

thoracolumbar aponeurosis, spinous processes of T7-T12, iliac crest, lower ribs

Question 22

Latissimus Dorsi, insertion

Answer 22

floor of bicipital groove of humerus

Question 23

Latissimus Dorsi, action

Answer 23

extension of shoulder, internal rotation of shoulder, adduction of shoulder

Question 24

Latissimus Dorsi, nerve supply

Answer 24

thoracodorsal nerve

Question 25

Latissimus Dorsi, blood supply

Answer 25

thoracodorsal artery

Question 26

Serratus Posterior Superior, origin

Answer 26

ligamentum nuchae, spinous processes of C7-T3

Question 27

Serratus Posterior Superior, insertion

Answer 27

superior borders of ribs 2, 3, 4

Question 28

Serratus Posterior Superior, action

Answer 28

elevates ribs

Question 29

Serratus Posterior Superior, nerve supply

Answer 29

intercostal nerves T1-T4

Question 30

Serratus Posterior Superior, blood supply

Answer 30

posterior intercostal arteries

Question 31

Serratus Posterior Inferior, origin

Answer 31

spinous processes of T11-L2

Question 32

Serratus Posterior Inferior, insertion

Answer 32

inferior borders of ribs 9-12

Question 33

Serratus Posterior Inferior, action

Answer 33

depresses ribs

Question 34

Serratus Posterior Inferior, nerve supply

Answer 34

intercostal nerves T9-T12

Question 35

Serratus Posterior Inferior, blood supply

Answer 35

posterior intercostal arteries

Question 36

Iliocostalis, origin

Answer 36

posterior ribs, thoracolumbar aponeurosis, iliac crests, sacrum

Question 37

Iliocostalis, insertion

Answer 37

cervical transverse processes, posterior ribs

Question 38

Iliocostalis, action

Answer 38

bilaterally- extension of vertebral column | unilaterally- lateral flexion of vertebral column

Question 39

Iliocostalis, nerve supply

Answer 39

dorsal rami of spinal nerves

Question 40

Iliocostalis, blood supply

Answer 40

posterior intercostal arteries, lumbar arteries

Question 41

Longissimus, origin

Answer 41

lower cervical and thoracic transverse processes, thoracolumbar aponeurosis, iliac crests, sacrum

Question 42

Longissimus, insertion

Answer 42

mastoid process, cervical and thoracic transverse processes

Question 43

Longissimus, action

Answer 43

bilaterally- extension of vertebral column | unilaterally- lateral flexion of vertebral column

Question 44

Longissimus, nerve supply

Answer 44

dorsal rami of spinal nerves

Question 45

Longissimus, blood supply

Answer 45

posterior intercostal arteries, lumbar arteries

Question 46

Spinalis, origin

Answer 46

ligamentum nuchae, cervical, thoracic, and lumbar spinous processes, sacrum, iliac crests

Question 47

Spinalis, insertion

Answer 47

occipital bone, C2-4 and most thoracic spinous processes

Question 48

Spinalis, action

Answer 48

bilaterally- extension of vertebral column | unilaterally- lateral flexion of vertebral column

Question 49

Spinalis, nerve supply

Answer 49

dorsal rami of spinal nerves

Question 50

Spinalis, blood supply

Answer 50

posterior intercostal arteries, lumbar arteries