Superficial Back Muscles

Front 1

What is the origin of the trapezius?

Back 1

superior nuchal line, EOP, T1-T12 spinous processes

Front 2

What is the insertion of the trapezius?

Back 2

spine of scapula, acromion, clavical

Front 3

What is the action of the trapezius?

Back 3

elevates, retracts pectoral girdle, superiorly rotates scapula

Front 4

What nerve innervates the trapezius?

Back 4

accessory nerve CN XI

Front 5

What is the origin of the Latissimus Dorsi?

Back 5

T7 - L5 spinous processes, thoracolumbar fascia, dorsal sacrum, iliac crest

Front 6

What is the insertion of the Latissimus dorsi?

Back 6

floor intertubercular groove

Front 7

What is the action of the latissimus dorsi?

Back 7

extends, adducts, medially rotates humerus

Front 8

what nerve innervates the latissimus dorsi?

Back 8

thoracodorsal nerve

Front 9

What do the superior latissimus dorsi, medial border of scapula, and lateral trapezius form?

Back 9

the triangle of auscultation - good place to put your stethoscope, the triangle expands as the patient leans forward

Front 10

origin of levator scapulae

Back 10

c1-c2 transverse processes, C3-C4 posterior tubercules

Front 11

insertion of the levator scapulae

Back 11

superior angle of scapula

Front 12

action of the levator scapulae

Back 12

elevates, protracts pectoral girdle, inferiorly rotates scapula

Front 13

what is the nerve that innervates the levator scapulae

Back 13

C3-C4 ventral rami and dorsal scapular nerve

Front 14

What 3 muscles are innervated by the dorsal scapular nerve?

Back 14

the rhomboid major, rhomboid minor, and the levator scapulae

Front 15

What is the origin of the rhomboid major?

Back 15

T2-T5 spinous processes

Front 16

insertion of rhomboid major? minor?

Back 16

medial border to scapula

same, + superior to major

Front 17

action of rhomboid major and minor?

Back 17

retracts, elevates pectoral girdle, inferiorly rotates scapula

Front 18

origin of serratus posterior superior?

Back 18

C7-T3 spinous processes

Front 19

origin of serratus posterior superior?

Back 19

superior borders of ribs 2-5

Front 20

action of serratus posterior superior?

Back 20

move ribs 2-5 weakly

Front 21

what nerve innervates serratus posterior superior?

Back 21

ventral rami T2-5

Front 22

what is the origin of the serratus posterior inferior?

Back 22

T11-L3 spinous processes

Front 23

insertion of the serratus posterior inferior?

Back 23

inferior borders of ribs 9-12

Front 24

action of teh serratus posterior inferior?

Back 24

weakly depresses ribs 9-12

Front 25

nerve that innervates serratus posterior inferior?

Back 25

ventral rami T9-12

Front 26

origin of teres major?

Back 26

posterior surface inferior angle of scapula

Front 27

insertion of teres major?

Back 27

medial lip intertubercular groove

Front 28

action of teres major?

Back 28

extends, adducts, medially rotates humerus

Front 29

nerve that innervates teres major?

Back 29

lower subscapular nerve

Front 30

origin of deltoid?

Back 30

spine fo scapula, acromion, clavicle (same as trapezius)

Front 31

insertion of deltoid?

Back 31

deltoid tuberosity of humerus

Front 32

action of deltoid?

Back 32

anterior - flex, medially rotate humerus
lateral - abduct humerus
posterior - extend, laterally rotate humerus

Front 33

nerve that innervates deltoid?

Back 33

axillary nerve

Front 34

what is the function of the bursae?

Back 34

lubricate the joint

Front 35

Origin of supraspinatus

Back 35

supraspinous fossa

Front 36

insertion of supraspinatus?

Back 36

greater tubercle of humerus

Front 37

action of supraspinatus?

Back 37

abducts humerus

Front 38

nerve that innervates supraspinatus?

Back 38

spurascapular nerve

Front 39

origin of infraspinatus?

Back 39

infraspinous fossa

Front 40

insertion of infraspinatus?

Back 40

greater tubercle of humerus

Front 41

insertion of infraspinatus?

Back 41

greater tubercle of humerus

Front 42

action of infraspinatus?

Back 42

laterally rotates humerus

Front 43

nerve that innervates infraspinatus?

Back 43

suprascapular nerve

Front 44

origin of subscapularis?

Back 44

subscapular fossa

Front 45

insertion of subscapularis?

Back 45

lesser tubercle of humerus

Front 46

action of subscapularis?

Back 46

medially rotates humerus

Front 47

nerve that innervates subscapularis

Back 47

upper and lower subscapular nerves

Front 48

origin of teres minor?

Back 48

posterior surface, middle lateral border to scapula

Front 49

insertion of teres minor?

Back 49

greater tubercle of humerus

Front 50

action of teres minor?

Back 50

laterally rotates humerus

Front 51

nerve that innervates teres minor?

Back 51

axillary nerve

Front 52

what is in the origin of serratus anterior?

Back 52

ribs 1-8, laterally

Front 53

insertion of serratus anterior?

Back 53

anterior side of scapula along medial border

Front 54

action of serratus anterior?

Back 54

protracts pectoral girdle, holds scapula to rib cage, superiorly rotates scapula

Front 55

nerve that innervates serratus anterior?

Back 55

long thoracic nerve

Front 56

what is odd about the long thoracic nerve?

Back 56

it is on the surface of the muscle

Front 57

what nerve goes through the quandrangular space?

Back 57

axillary nerve

Front 58

what artery goes through the triangular space?

Back 58

circumflex scapular artery

Front 59

what is the main blood supply of the superficial back muscles?

Back 59

subclavian artery that branches off to a number of other arteries

Front 60

once subclavian artery passes first rib, what does it's name become?

Back 60

axillary artery

Front 61

suprascapular artery goes over what ligament?

Back 61

transverse scapular ligament

Front 62

what usually causes a lesion of long thoracic nerve? and what results?

Back 62

trauma usually, wing

Front 63

what nerve is very susceptible if a fracture of the surgical neck of humerus occurs?

Back 63

axillary nerve because it goes through the quandrangular space