Extrinsic Back Muscles - Exam 1

Question 1

trapezius origin

Answer 1

external occipital protuberance, nuchal ligament, SP of thoracic vertebrae

Question 2

trapezius insertion

Answer 2

lateral clavicle, acromion, scapular spine

Question 3

trapezius blood supply

Answer 3

descending - occipital artery
transverse - transverse cervical artery
ascending - dorsal scapular artery

Question 4

trapezius innervation

Answer 4

spinal accessory nerve (cranial nerve XI)

Question 5

trapezius actions

Answer 5

descending - elevation of scapula
transverse - retraction of scapula
ascending - depression of scapula

Question 6

latissimus dorsi origin

Answer 6

thoracolumbar fascia, iliac crest, SP lower thoracic vertebrae (T7-T12), inferior angle of scapula, lower ribs

Question 7

latissimus dorsi insertion

Answer 7

inter tubercular groove of humerus

Question 8

latissimus dorsi blood supply

Answer 8

thoracodorsal artery

Question 9

latissimus dorsi innervation

Answer 9

thoracodorsal nerve

Question 10

latissimus dorsi actions

Answer 10

medial rotation of humerus, ADduction of arm, extension of arm
“pull ups”

Question 11

rhomboid minor origin

Answer 11

SP of C7-T1

Question 12

rhomboid minor insertion

Answer 12

medial border of scapula (above spine)

Question 13

rhomboid minor blood supply

Answer 13

dorsal scapular artery

Question 14

rhomboid minor innervation

Answer 14

dorsal scapular nerve

Question 15

rhomboid minor actions

Answer 15

retraction of scapula

Question 16

rhomboid major origin

Answer 16

SP of T2-T5

Question 17

rhomboid major insertion

Answer 17

medial border of scapula (below spine)

Question 18

rhomboid major blood supply

Answer 18

dorsal scapular artery

Question 19

rhomboid major innervation

Answer 19

dorsal scapular nerve

Question 20

rhomboid major actions

Answer 20

retraction of scapula

Question 21

levator scapula origin

Answer 21

TP of C1-C4

Question 22

levator scapula insertion

Answer 22

superior angle of scapula

Question 23

levator scapula blood supply

Answer 23

dorsal scapular artery

Question 24

levator scapula innervation

Answer 24

dorsal scapular nerve

Question 25

levator scapula actions

Answer 25

raising scapula superiorly

Question 26

triangle of auscultation

Answer 26

lateral border of trap, medial border of scap, superior border of lat good for hearing lung sounds

Question 27

extrinsic back muscles function

Answer 27

limb mobility, respiration

Question 28

superficial extrinsic back muscles

Answer 28

trap, latissimus dorsi, rhomboids, levator

Question 29

serratus posterior superior origin

Answer 29

nuchal ligament

Question 30

serratus posterior superior insertion

Answer 30

upper ribs

Question 31

serratus posterior superior action

Answer 31

aids in respiration

Question 32

serratus posterior inferior origin

Answer 32

SP of T11-L2

Question 33

serratus posterior inferior insertion

Answer 33

lower ribs

Question 34

serratus posterior inferior action

Answer 34

aids in respiration

Question 35

intermediate extrinsic back muscles function

Answer 35

aids in respiration

Question 36

intermediate extrinsic back muscles

Answer 36

serratus posterior superior and inferior