Back and Neck Muscles

Question 1

Trapezius origin

Answer 1

external occipital protuberance of occipital bone, ligamentum nuchae (C1-C6), spinous
processes of C7 through T12

Question 2

Trapezius insertion

Answer 2

spine of scapula, acromion process of scapula, lateral 1/3 of clavicle

Question 3

Trapezius actions

Answer 3

upper fibers: upward rotation of scapula, elevation of scapula
middle fibers: retraction of scapula
lower fibers: upward rotation of scapula, depression of scapula

Question 4

Trapezius innervation

Answer 4

accessory nerve (Cranial Nerve XI)

Question 5

Trapezius blood supply

Answer 5

transverse cervical a.

Question 6

Latissimus dorsi origin

Answer 6

spinous processes of T7 through L5, posterior iliac crest of ilium

Question 7

Latissimus dorsi insertion

Answer 7

crest of lesser tubercle of humerus, floor of intertubercular groove of humerus

Question 8

Latissimus dorsi actions

Answer 8

extension of humerus, medial rotation of humerus, adduction of humerus

Question 9

Latissimus dorsi innervation

Answer 9

thoracodorsal nerve

Question 10

Latissimus dorsi blood supply

Answer 10

thoracodorsal a.

Question 11

Levator scapulae origin

Answer 11

transverse processes of Cl through C4

Question 12

Levator scapulae insertion

Answer 12

superior angle of scapula

Question 13

Levator scapulae actions

Answer 13

elevation of scapula, downward rotation of scapula

Question 14

Levator scapulae innervation

Answer 14

dorsal scapular nerve

Question 15

Levator scapulae blood supply

Answer 15

dorsal scapular a.

Question 16

Rhomboid major origin

Answer 16

spinous processes of T2 through T5

Question 17

Rhomboid major insertion

Answer 17

medial (vertebral) border of scapula inferior to base of the spine

Question 18

Rhomboid major actions

Answer 18

retraction of scapula, elevation of scapula, downward rotation of scapula

Question 19

Rhomboid major innervation

Answer 19

dorsal scapular nerve

Question 20

Rhomboid major blood supply

Answer 20

dorsal scapular a.

Question 21

Rhomboid minor origin

Answer 21

spinous processes of C7 and Tl, lower ligamentum nuchae

Question 22

Rhomboid minor insertion

Answer 22

medial (vertebral) border at the base of the spine of the scapula

Question 23

Rhomboid minor actions

Answer 23

retraction of scapula, elevation of scapula, downward rotation of scapula

Question 24

Rhomboid minor innervation

Answer 24

dorsal scapular nerve

Question 25

Rhomboid minor blood supply

Answer 25

dorsal scapular a.

Question 26

Splenius capitis origin

Answer 26

lower half of ligamentum nuchae, spinous processes of C7-T4 vertebrae

Question 27

Splenius capitis insertion

Answer 27

mastoid process of temporal bone, occipital bone below lateral nuchal line

Question 28

Splenius capitis actions

Answer 28

extend head and neck, laterally flex head and neck; rotate head to same side

Question 29

Splenius capitis innervation

Answer 29

dorsal rami of middle cervical spinal nerves

Question 30

Splenius capitis blood supply

Answer 30

Occipital a.

Question 31

Splenius cervicis origin

Answer 31

spinous processes of T3-T6 vertebrae

Question 32

Splenius cervicis insertion

Answer 32

transverse processes of C1-C3 vertebrae (anterior to Levator Scapulae)

Question 33

Splenius cervicis actions

Answer 33

extend head and neck, laterally flex head and neck; rotate head to same side

Question 34

Splenius cervicis innervation

Answer 34

dorsal rami of spinal nerves

Question 35

Spenius cervicis blood supply

Answer 35

Occipital a.

Question 36

Semispinalis capitis origin

Answer 36

transverse processes of C7-T12 vertebrae

Question 37

Semispinalis capitis insertion

Answer 37

between superior and inferior nuchal lines of occipital bone

Question 38

Semispinalis capitis actions

Answer 38

extend head and neck, rotate head and vertebral column contralaterally

Question 39

Semispinalis capitis innervation

Answer 39

dorsal rami of spinal nerves

Question 40

Semispinalis capitis blood supply

Answer 40

occipital artery

Question 41

Erector Spinae Group origin

Answer 41

transverse and spinous processes of T10-L5, sacrum, iliac crest of ilium

Question 42

Erector Spinae Group insertion

Answer 42

spinous processes of thoracic vertebrae, transverse processes of cervical and thoracic vertebrae, ribs, occipital bone, sometimes temporal bone

Question 43

Erector Spinae Group Actions

Answer 43

extend vertebral column, lateral flexion of vertebral column, head and neck

Question 44

Erector Spinae Group Innervation

Answer 44

dorsal rami of spinal nerves C1-S5

Question 45

Erector Spinae Group Blood supply

Answer 45

deep cervical artery, posterior intercostal arteries, subcostal arteries, lumbar artery

Question 46

Serratus Posterior Superior origin

Answer 46

spines of C7 -T3, ligamentum nuchae

Question 47

Serratus Posterior Superior insertion

Answer 47

Ribs 1-4

Question 48

Serratus Posterior Superior Actions

Answer 48

Draws upper ribs up and back

Question 49

Serratus Posterior Superior Innervation

Answer 49

ventral rami of T1-T4 nerves (intercostal nerves)

Question 50

Serratus Posterior Superior Blood supply

Answer 50

posterior intercostal arteries 1-4

Question 51

Serratus Posterior Inferior origin

Answer 51

spinous processes of T11-L2 (via thoracolumbar fascia)

Question 52

Serratus Posterior Inferior Insertion

Answer 52

inferior border of ribs 8-12

Question 53

Serratus Posterior Inferior Actions

Answer 53

draws lower ribs down and back

Question 54

Serratus Posterior Inferior Innervation

Answer 54

ventral rami of T9-T12 (intercostal nerves)

Question 54

Serratus Posterior Inferior Blood supply

Answer 54

lowest posterior intercostal artery, subcostal artery, first two lumbar arteries