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Gross Anatomy > Test 2 Muscles of Shoulder and Arm > Flashcards

Test 2 Muscles of Shoulder and Arm Flashcards

0
Q

deltopectoral grove

A
  • between pectoralis major and deltoid

- cephalic vein runs through

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1
Q

anterior axioappendicular muscles
(thoracoappendicular or pectoral)
-move pectoral girdle

A
  • pectoralis major
  • pectoralis minor
  • sublavius
  • serratus anterior
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2
Q 
clavipectoral triangle
(deltopectoral)
A

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

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3
Q

pectoralis major origin

A

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

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4
Q

pectoralis major insertion

A

lateral lip of intertubercular sulcus(grove) of humerus

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5
Q

Pectoralis major innervation

A

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

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6
Q

pectoralis major action

A
  • 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

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7
Q

pectoralis minor insertion

A

Medial border and superior surface of coracoid process of scapula

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8
Q

pectoralis minor origin

A

3rd-5th costal ribs near their costal cartilages

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9
Q

pectoralis minor inervation

A

medial pectoral nerve (C8, T1)

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10
Q

pectoralis minor action

A

stabalizes scapula by drawing inferiorly nd anteriorly against thoracic walll

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11
Q

subclavius origin

A

junction of first rib and its costal cartilage

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12
Q

subclavius insertion

A

inferior surface of middle 1/3 of clavicle

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13
Q

subclavius innervation

A

subclavian nerve

C5, C6

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14
Q

subclavius action

A

anchors and depresses clavicle

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15
Q

serratus anterior origin

A

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

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16
Q

serratus anterior insertion

A

anterior surface of medial border of scapula

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17
Q

serratus anterior innervation

A

long thoracic nerve

C5, C6, C7

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18
Q

serratus anterior action

A

protracts scapula and holds against thoracic wall; rotates scapula

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19
Q

superficial posterior axioappendicular

extrinsic shoulder

A

trapezius

latissimus dorsi

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20
Q

deep posterior axioappendicular

extrinsic shoulder

A

levator scapula

rhomboids

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21
Q

scapulohumoral (intrinsic shoulder)

A
  • deltoid
  • teres major
  • 4 rotator cuff muscles; supraspinatus, infraspinatus, teres minor, subscapularis
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22
Q

deltoid proximal attachment ,origin

A
  • lateral 1/3 of clavicle

- acromion and spine of scapula

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23
Q

deltoid distal attachment, insertion

A

deltoid tuberosity of humerus

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24
Q

deltoid innervation

A

axillary neve

C5,C6

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25
Q

deltoid action

A
  • clavicular (anterior) flexes and medialy rotates
  • acromial (middle) abducts arm
  • spinal (posterior) part extends and laterally rotates arm
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26
Q

supraspinatus proximal attachment , origin

A

supraspinous fossa of scapula

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27
Q

supraspinatous distal attachment , insertion

A

superior facet of greater tubercle of humerus

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28
Q

supraspinatus innervation

A

suprascapular nerve

C4, C5, C6

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29
Q

supraspinatus action

A
  • initiates and assists deltoid in abduction of arm

- acts with rotator cuff muscles

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30
Q

infraspinatus proximal attachment, origin

A

infraspinous fossa of scapula

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31
Q

infraspinatus distal attatchment, insertion

A

middle facet of greater tubercle of humerus

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32
Q

infraspinatus innervation

A

suprascapular nerve

C5, C6

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33
Q

infraspinatus action

A
  • laterally rotate arm

- help hold humoral head in glenoid cavity of scapula

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34
Q

teres minor proximal attachment, origin

A

Middle part of lateral border of scapula

35
Q

Teres minor Distal attachment, insertion

A

Inferior facet of greater tubercle of humerus

36
Q

Teres minor innervation

A

axillary nerve

C5,C6

37
Q

teres minor action

A
  • laterally rotate arm

- help hold humoral head in glenoid cavity of scapula

38
Q

teres major proximal attachment , origin

A

Posterior surface of interior angle of scapula

39
Q

Teres major distal attachment insertion

A

Medial lip intertubercular groove of humerus

40
Q

teres major innervation

A

lower subscapular nerve

C5, C6

41
Q

subscapularis proximal attachment , origin

A

subscapular fossa (most of anterior surface of scapula)

42
Q

subscapularis distal attachment, insertion

A

Lesser tubercle of humerus

43
Q

subscapularis innervation

A

Upper and lower subscapular nerves

C5 C6 C7

44
Q

subscapularis action

A
  • medially rotates and adducts arm

- helps hold humeral head in glenoid cavity

45
Q

biceps brachii proximal attatchment, origin

A

short head:tip of corocoid process of scapula

long head: supraglenoid tubercle of scapula

46
Q

biceps brachii distal attachment, insertion

A
  • tuberosity of radius

- fascia of forearm via bicipital aponeurous

47
Q

biceps brachii innervation

A

musculocutaneous nerve

C5 C6

48
Q

biceps brachii action

A
  • Supinates forearm and, when it is supinated, flexes forearm
  • flexes arm
  • short head helps resist dislocation of shoulder
49
Q

brachialis proximal attachment ,origin

A

distal half of anterior surface of humerus

50
Q

brachialis distal attachment , insertion

A

coronoid process and tuberosity of ulna

51
Q

brachialis innervation

A

musculocutaneous nerve

C5 C6

52
Q

brachialis action

A

flexes forearm in all positions

53
Q

coracobrachialis proximal attachment, origin

A

tip of coracoid process of scapula

54
Q

coracobrachialis distal attachment , insertion

A

middle 1/3 of medial surface of humerus

55
Q

coracobrachialis innervation

A

musculocutaneous nerve

C6 C7 C8

56
Q

coracobrachialis action

A
  • helps flex and adduct arm

- resists dislocation of shoulder

57
Q

triceps brachii proximal attachment origin

A

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
Q

triceps brachi distal attachment , insertion

A

proximal end of olecranon of ulna and fascia of forearm

59
Q

triceps brachii innervation

A

radial nerve

C6 C7 C8

60
Q

anconeus proximal attachment origin

A

lateral epicondyle of humerus

61
Q

anconeus distal attachment insertion

A

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

62
Q

anconeus innervation

A

radial nerve

C7 C8 T1

63
Q

anconeus action

A
  • Assist triceps in extending forearm
  • stabilizes elbow joint
  • abducts ulna during pronation
64
Q

Posterior axioappendicular muscles

A
  • Trapezius and Latissimus Dorsi(superifical)

- Levator scapula and rhomboid major and minor (Deep)

65
Q

Trapezius origin

A

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

66
Q

Trapezius insertion

A

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

67
Q

Trapezius Innervation

A

Spinal Accessory Nerve CN 11(C3, C4)

68
Q

Trapezius Action

A

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

69
Q

Latissimus Dorsi Origin

A

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

70
Q

Latissimus Dorsi Insertion

A

Floor of intertubercular sulcus of humerus

71
Q

Latissimus Dorsi Innervation

A

Thoracodorsal Nerve

C 6,7,8 keeps the lats great!

72
Q

Latissimus Dorsi Action

A

medially rotate, adduct and extend humerus

also helps bring body close to arms in upward climbing

73
Q

Levator Scapula Origin

A

Posterior tubercles of transverse process of C1-C4

74
Q

Levator Scapula Insertion

A

medial border of scapula superior to the spine of scapula

75
Q

Levator Scapula Innervation

A

Dorsalscapular nerve

C3, C4, C5

76
Q

Levator Scapula Action

A

Inferiorly tilt glenoid cavity by rotating scapula

elevates scapula

77
Q

Rhomboid Minor Origin

A

Nuchal ligament

Spinous process of C7-T1

78
Q

Rhomboid minor insertion

A

Triangular area of medial end of scapular spine

79
Q

Rhomboid minor Innervation

A

Dorsalscapular nerve

C4, C5

80
Q

Rhomboid Minor Action

A

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

81
Q

Rhomboid Major Origin

A

Spinous process of T2-T5

82
Q

Rhomboid Major Insertion

A

medial border of scapula from level of spine to inferior angle

83
Q

Rhomboid major innervation

A

Dorsalscapular nerve

C4, C5

84
Q

Rhomboid major action

A

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

85
Q

Muscles of the rotator cuff

A

SITS

Supraspinatus, Infrspinatus, Teres Minor, Subscapularis

Gross Anatomy (20 decks)

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