Test 2 Muscles of Shoulder and Arm Flashcards Preview

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Flashcards in Test 2 Muscles of Shoulder and Arm Deck (86):
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anterior axioappendicular muscles
(thoracoappendicular or pectoral)
-move pectoral girdle

-pectoralis major
-pectoralis minor
-sublavius
-serratus anterior

1

deltopectoral grove

-between pectoralis major and deltoid
-cephalic vein runs through

2

clavipectoral triangle
(deltopectoral)

formed by deltoid and pectoralis major diverging ,superiorly, along with the clavicle

3

pectoralis major origin

clavicular head-anterior surface of medial 1/2 of clavicle

sternocostal head-anterior surface of sternum, superior six costal cartalidges, apeneurosis of external oblique muscle

4

pectoralis major insertion

lateral lip of intertubercular sulcus(grove) of humerus

5

Pectoralis major innervation

Lateral and medial pectoral nerve clavicular head (C5, C6), sternocostal head ( C7, C8,T1)

6

pectoralis major action

-adducts and medially rotates humerus
-draws scapula anteriorly and inferiorly

-acting alone clavicular head flexes humerus and sternocostal head extends it from the flexed position

7

pectoralis minor insertion

Medial border and superior surface of coracoid process of scapula

8

pectoralis minor origin

3rd-5th costal ribs near their costal cartilages

9

pectoralis minor inervation

medial pectoral nerve (C8, T1)

10

pectoralis minor action

stabalizes scapula by drawing inferiorly nd anteriorly against thoracic walll

11

subclavius origin

junction of first rib and its costal cartilage

12

subclavius insertion

inferior surface of middle 1/3 of clavicle

13

subclavius innervation

subclavian nerve
(C5, C6)

14

subclavius action

anchors and depresses clavicle

15

serratus anterior origin

externl surface of lateral parts of 1st - 8th ribs

16

serratus anterior insertion

anterior surface of medial border of scapula

17

serratus anterior innervation

long thoracic nerve
(C5, C6, C7)

18

serratus anterior action

protracts scapula and holds against thoracic wall; rotates scapula

19

superficial posterior axioappendicular
(extrinsic shoulder)

trapezius
latissimus dorsi

20

deep posterior axioappendicular
(extrinsic shoulder)

levator scapula
rhomboids

21

scapulohumoral (intrinsic shoulder)

-deltoid
-teres major
-4 rotator cuff muscles; supraspinatus, infraspinatus, teres minor, subscapularis

22

deltoid proximal attachment ,origin

-lateral 1/3 of clavicle
-acromion and spine of scapula

23

deltoid distal attachment, insertion

deltoid tuberosity of humerus

24

deltoid innervation

axillary neve
(C5,C6)

25

deltoid action

-clavicular (anterior) flexes and medialy rotates
-acromial (middle) abducts arm
-spinal (posterior) part extends and laterally rotates arm

26

supraspinatus proximal attachment , origin

supraspinous fossa of scapula

27

supraspinatous distal attachment , insertion

superior facet of greater tubercle of humerus

28

supraspinatus innervation

suprascapular nerve
C4, C5, C6

29

supraspinatus action

-initiates and assists deltoid in abduction of arm
-acts with rotator cuff muscles

30

infraspinatus proximal attachment, origin

infraspinous fossa of scapula

31

infraspinatus distal attatchment, insertion

middle facet of greater tubercle of humerus

32

infraspinatus innervation

suprascapular nerve
C5, C6

33

infraspinatus action

-laterally rotate arm
- help hold humoral head in glenoid cavity of scapula

34

teres minor proximal attachment, origin

Middle part of lateral border of scapula

35

Teres minor Distal attachment, insertion

Inferior facet of greater tubercle of humerus

36

Teres minor innervation

axillary nerve
C5,C6

37

teres minor action

-laterally rotate arm
- help hold humoral head in glenoid cavity of scapula

38

teres major proximal attachment , origin

Posterior surface of interior angle of scapula

39

Teres major distal attachment insertion

Medial lip intertubercular groove of humerus

40

teres major innervation

lower subscapular nerve
C5, C6

41

subscapularis proximal attachment , origin

subscapular fossa (most of anterior surface of scapula)

42

subscapularis distal attachment, insertion

Lesser tubercle of humerus

43

subscapularis innervation

Upper and lower subscapular nerves
C5 C6 C7

44

subscapularis action

-medially rotates and adducts arm
-helps hold humeral head in glenoid cavity

45

biceps brachii proximal attatchment, origin

short head:tip of corocoid process of scapula

long head: supraglenoid tubercle of scapula

46

biceps brachii distal attachment, insertion

-tuberosity of radius
-fascia of forearm via bicipital aponeurous

47

biceps brachii innervation

musculocutaneous nerve
C5 C6

48

biceps brachii action

-Supinates forearm and, when it is supinated, flexes forearm
-flexes arm
-short head helps resist dislocation of shoulder

49

brachialis proximal attachment ,origin

distal half of anterior surface of humerus

50

brachialis distal attachment , insertion

coronoid process and tuberosity of ulna

51

brachialis innervation

musculocutaneous nerve
C5 C6

52

brachialis action

flexes forearm in all positions

53

coracobrachialis proximal attachment, origin

tip of coracoid process of scapula

54

coracobrachialis distal attachment , insertion

middle 1/3 of medial surface of humerus

55

coracobrachialis innervation

musculocutaneous nerve
C6 C7 C8

56

coracobrachialis action

-helps flex and adduct arm
-resists dislocation of shoulder

57

triceps brachii proximal attachment origin

long head: infraglenoid tubercle of scapula

lateral head:posterior surface of humerus, superior to radial groove

medial head:posterior of surface of humerus, inferior to radial groove

58

triceps brachi distal attachment , insertion

proximal end of olecranon of ulna and fascia of forearm

59

triceps brachii innervation

radial nerve
C6 C7 C8

60

anconeus proximal attachment origin

lateral epicondyle of humerus

61

anconeus distal attachment insertion

lateral surface of olecrnon and superior part of posterior surface of ulna

62

anconeus innervation

radial nerve
C7 C8 T1

63

anconeus action

-Assist triceps in extending forearm
-stabilizes elbow joint
-abducts ulna during pronation

64

Posterior axioappendicular muscles

-Trapezius and Latissimus Dorsi(superifical)
-Levator scapula and rhomboid major and minor (Deep)

65

Trapezius origin

Middle superior nuchal line, EOP, nuchal ligament, C7-T12 spinous processes

66

Trapezius insertion

Lateral 1/3 of clavicle, acromion, spine of scapula

67

Trapezius Innervation

Spinal Accessory Nerve CN 11(C3, C4)

68

Trapezius Action

Descending fibers: elevate scapula
Ascending fibers:depress scapula
Middle fibers: retract scapula
Ascending and descending fibers: rotate glenoid cavity superiorly

69

Latissimus Dorsi Origin

Illiac crest, thoracolumbar fascia, inferior 3-4 ribs, inferior 6 spinous processes of verterbrae

70

Latissimus Dorsi Insertion

Floor of intertubercular sulcus of humerus

71

Latissimus Dorsi Innervation

Thoracodorsal Nerve
C 6,7,8 keeps the lats great!

72

Latissimus Dorsi Action

medially rotate, adduct and extend humerus
also helps bring body close to arms in upward climbing

73

Levator Scapula Origin

Posterior tubercles of transverse process of C1-C4

74

Levator Scapula Insertion

medial border of scapula superior to the spine of scapula

75

Levator Scapula Innervation

Dorsalscapular nerve
C3, C4, C5

76

Levator Scapula Action

Inferiorly tilt glenoid cavity by rotating scapula
elevates scapula

77

Rhomboid Minor Origin

Nuchal ligament
Spinous process of C7-T1

78

Rhomboid minor insertion

Triangular area of medial end of scapular spine

79

Rhomboid minor Innervation

Dorsalscapular nerve
C4, C5

80

Rhomboid Minor Action

Retract scapula
Fix scapula to thoracic wall
Rotate scapula to depress glenoid cavity

81

Rhomboid Major Origin

Spinous process of T2-T5

82

Rhomboid Major Insertion

medial border of scapula from level of spine to inferior angle

83

Rhomboid major innervation

Dorsalscapular nerve
C4, C5

84

Rhomboid major action

Retract scapula
Fix scapula to thoracic wall
Rotate scapula to depress the glenoid cavity

85

Muscles of the rotator cuff

SITS
Supraspinatus, Infrspinatus, Teres Minor, Subscapularis