back muscles

Question 1

trapezius origin

Answer 1

base of the occiput
spinous processes of C7-T12

Question 2

trapezius insertion:

Answer 2

spine of the scapula, acromium process of the clavicle

Question 3

trapezius innervation:

Answer 3

spinal accessory nerve

Question 4

trapezius vasculature:

Answer 4

ascending branch of the transverse cervical artery

Question 5

trapezius function:

Answer 5

upper: elevates scapula
middle: adducts (retracts) scapula
lower: depresses scapula

rotates scapula during abduction of humerus above the horizontal

Question 6

latissimus dorsi innervation:

Answer 6

thoracordorsal nerve (C6-C8)

Question 7

latissimus dorsi vasculature:

Answer 7

thoracordorsal artery

Question 8

latissimus dorsi origin:

Answer 8

spinous processes T7-L5, sacrum, iliac crest, ribs 10-12

Question 9

latissimus dorsi insertion:

Answer 9

floor of inter-tubercular sulcus of humerus

*anterior side of the humerus

Question 10

latissimus dorsi function:

Answer 10

adduct, medially rotate, and elevates humerus

Question 11

levator scapulae origin:

Answer 11

transverse processes of C1-C4

Question 12

levator scapulae insertion point:

Answer 12

upper portion of the medial scapula (superior angle)

Question 13

levator scapulae innervation:

Answer 13

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

Question 14

levator scapulae vasculature:

Answer 14

thyrocervical branch (transverse and ascending cervical arteries)

Question 15

levator scapulae function:

Answer 15

elevates scapula

Question 16

rhomboid major innervation:

Answer 16

dorsal scapular nerve (C4-C5)

Question 17

rhomboid major vasculature:

Answer 17

dorsal scapular artery

Question 18

rhomboid major insertion:

Answer 18

medial border of scapula

Question 19

rhomboid major origin:

Answer 19

T2-T5

Question 20

rhomboid major function:

Answer 20

retracts/adducts and elevates scapula

Question 21

rhomboid minor innervation:

Answer 21

dorsal scapular nerve (C4-C5)

Question 22

rhomboid minor vasculature:

Answer 22

dorsal scapular artery

Question 23

rhomboid minor origin:

Answer 23

spinous processes of C7 and T1

Question 24

rhomboid minor insertion:

Answer 24

root of the scapula spine (on the start of that ridge)

Question 25

rhomboid minor function:

Answer 25

retracts/adducts and elevates scapula

Question 26

serratus posterior superior origin:

Answer 26

lower ligamentum nuchae
spinous processes of C7-T3

Question 27

serratus posterior superior insertion:

Answer 27

upper border of ribs 2-5

Question 28

serratus posterior superior innervation:

Answer 28

intercostal nerves (ventral rami of upper thoracic nerves, T2-T5)

Question 29

serratus posterior superior function:

Answer 29

elevates ribs 2-5 during inspiration

Question 30

serratus posterior inferior origin:

Answer 30

spinous processes of T11-L3

Question 31

serratus posterior inferior insertion:

Answer 31

lower border of ribs 9-12

Question 32

serratus posterior inferior innervation:

Answer 32

intercostal nerves (ventral rami of lower thoracic nerves T9-T12)

Question 33

serratus posterior inferior function:

Answer 33

depresses ribs 9-12 during expiration
prevents lower ribs from being elevated when the diaphragm contracts

Question 34

splenius capitus insertion:

Answer 34

mastoid process, skull near superior nuchal line

Question 35

splenius capitus origin:

Answer 35

lower half of ligamentum nuchae
spinous processes C8-T4

Question 36

splenius capitus innervation:

Answer 36

dorsal rami of middle cervical nerves

Question 37

splenius capitus function:

Answer 37

together: draws head backwards, extending the neck
individual: draws and rotates head to the side

Question 38

splenius cerivicus origin:

Answer 38

spinous processes T3-T6

Question 39

splenius cervicus insertion:

Answer 39

transverse processes of C1-C3

Question 40

splenius cervicus innervation:

Answer 40

dorsal rami of the middle cervical nerves

Question 41

splenius cervicus function:

Answer 41

together: extend neck (do not attach to head)
individual: draw and rotate head to one side

Question 42

what are the. 3 erector spinae muscles?

Answer 42

iliocostalis
longissimus
spinalis