Shoulder Flashcards

1
Q

what is the part of the scapula that articulates with the humerus?

A

glenoid cavity

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2
Q

what does the glenoid cavity articulate with?

A

the head of the humerus

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3
Q

the anterior part of the pectoral girdle

A

clavicle

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4
Q

branch of the brachiocephalic trunk, which arises from the aortic arch

A

right subclavian artery

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5
Q

artery that arises directly from the aortic arch

A

left subclavian artery

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6
Q

origin of supraspinatus

A

supraspinous fossa of the scapula

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7
Q

insertion of supraspinatus

A

superior facet of the greater tubercle of the humerus

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8
Q

innervation of supraspinatus

A

suprascapular n. (C4-C6)

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9
Q

action of supraspinatus

A

initiation of abduction

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10
Q

origin of infraspinatus

A

infraspinous process of scapula

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11
Q

insertion of infraspinatus

A

middle facet of the greater tubercle of humerus

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12
Q

innervation of infraspinatus

A

suprascapular n. (C4-C6)

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13
Q

origin of the teres minor

A

lateral border of the scapula

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14
Q

insertion of teres minor

A

inferior facet of the greater tubercle of the humerus

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15
Q

innervation of teres minor

A

axilllary n. (C5,C6)

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16
Q

action of teres minor

A

lateral (external) rotation, weak adduction

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17
Q

origin of subscapularis

A

subscapular fossa of the scapula

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18
Q

insertion of subscapularis

A

lesser tubercle of the humerus

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19
Q

innervation of subscapularis

A

superior subscapular n. (C5,C6)

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20
Q

action of subscapularis

A

medial (internal) rotation

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21
Q

origin of clavicular part of deltoid

A

lateral 1/3 of clavicle

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22
Q

origin of acromial part of deltoid

A

acromion

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23
Q

origin of the spinal part of deltoid

A

spine of the scapula

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24
Q

insertion of deltoid

A

deltoid tuberosity of the humerus

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25
Q

innervation of deltoid

A

axillary n. (C5,C6)

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26
Q

action of deltoid

A

clavicular: flexion, internal rotation, adduction
acromial: abduction
spinal: extension, external rotation, adduction

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27
Q

origin of teres major

A

inferior angle of the scapula

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28
Q

insertion of teres major

A

crest of lesser tubercle of the humerus (anterior angle)

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29
Q

innervation of teres major

A

lower subscapular n. (C5-C7)

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30
Q

action of teres major

A

internal rotation, adduction, extension

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31
Q

origin of clavicular part of pectoralis major

A

medial half of clavicle

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32
Q

origin of sternocostal part of pectoralis major

A

sternum and costal cartilages 1-6

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33
Q

origin of abdominal part of pectoralis major

A

rectus sheath (anterior layer)

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34
Q

insertion of pectoralis major

A

crest of greater tubercle of the humerus

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35
Q

innervation of pectoralis major

A

medial and lateral pectoral nn. (C5-T1)

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36
Q

action of pectoralis major

A

entire muscle: adduction, internal rotation

clavicular and sternocostal parts: flexion, assist in respiration when shoulder is fixed

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37
Q

borders of the quadrangular space

A

teres minor, teres major, long head of triceps brachii, humerus

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38
Q

what nerve passes through quadrangular space? what does it innervate?

A

axillary n.; teres minor and deltoid

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39
Q

what artery comes out of quadrangular space?

A

posterior circumflex humeral a.

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40
Q

borders of triangular space

A

teres minor and teres major

41
Q

what comes out of triangular space?

A

circumflex scapular a.

42
Q

borders of triceps hiatus

A

long head of triceps, humerus, teres major

43
Q

what comes out of triceps hiatus?

A

deep brachial a. and radial n.

44
Q

What is the origin of levator scapulae?

A

Transverse process of C1-C4

45
Q

innervation of levator scapulae

A

dorsal scapular nerve (C4-C5)

46
Q

action of levator scapulae

A

elevates the scapula medially while moving inferior angle medially, inclines neck ipsilaterally

47
Q

What is the insertion of levator scapulae?

A

superior part of the medial border of the scapula

48
Q

origin of trapezius (descending)

A

external occipital protuberance, spinous processes of C1-C7

49
Q

origin of trapezius (transverse)

A

aponeurosis at T1-T4 spinous processes

50
Q

origin of trapezius (ascending)

A

spinous process T5-T12

51
Q

insertion of trapezius (descending)

A

clavicle (lateral 1/3)

52
Q

insertion of trapezius (transverse)

A

acromion

53
Q

insertion of trapezius (ascending)

A

scapular spine

54
Q

innervation of trapezius

A

Accessory n., C3-C4 of cervical plexus

55
Q

action of trapezius

A

descending - draws scap up, rotates glenoid cavity superiorly, tilts head same side, rotates it opposite side
transverse - draws scap medially
ascending - draws scap medially downward

56
Q

origin of rhomboid minor

A

spinous process of C7-T1

57
Q

origin of rhomboid major

A

spinous process T2-T5

58
Q

insertion of rhomboids

A

medial border of the scapula above (minor) and below (major) the scapular spine

59
Q

innervation of rhomboids

A

dorsal scapular n. (C4-C5)

60
Q

actions of rhomboids

A

minor - draws scap medially upward while moving inferior angle medially
major - steadies scapula; draws scap medially upward

61
Q

origin of latissimus dorsi (vertebral)

A

spinous process of T7-T12; thoracolumbar fascia

62
Q

origin of latissimus dorsi (scapular)

A

scapula (inferior angle)

63
Q

origin of latissimus dorsi (costal)

A

9th to 12th ribs

64
Q

origin of latissimus dorsi (iliac)

A

iliac crest (posterior 1/3)

65
Q

insertion of latissimus dorsi

A

floor of the intertubercular sulcus of the humerus

66
Q

innervation of latissimus dorsi

A

thoracodorsal n. (C6-C8) “6 to 8, lats are great”

67
Q

action of latissimus dorsi

A

handcuff: internal rotation, adduction, extension, respiration (cough muscle)

68
Q

contents of triangular space

A

circumflex scapular a.

69
Q

contents of quadrangular space

A

axillary n. and posterior circumflex humeral a.

70
Q

contents of triceps hiatus

A

deep a. of the arm and radial n.

71
Q

origin of pectoralis minor

A

3rd to 5th ribs

72
Q

insertion of pectoralis minor

A

coracoid process of the scapula

73
Q

innervation of pectoralis minor

A

medial pectoral n. (C8,T1)

74
Q

action of pectoralis minor

A

anterior tilt of scapula, rotates glenoid cavity inferiorly, assist in respiration

75
Q

origin of serratus anterior

A

1st to 9th ribs

76
Q

insertion of serratus anterior

A

medial border of the scapula

77
Q

innervation of serratus anterior

A

long thoracic n. (C5-C7)

78
Q

action of serratus anterior (whole muscle)

A

draws scapula laterally forward (protraction), elevates ribs when shoulder is fixed

79
Q

origin of subclavius

A

1st rib

80
Q

insertion of subclavius

A

inferior surface of the clavicle

81
Q

innervation of subclavius

A

n. to subclavius (C5,C6)

82
Q

action of subclavius

A

steadies the clavicle in the sternoclavicular joint

83
Q

origin of sternocleidomastoid (sternal head)

A

manubrium of the sternum

84
Q

origin of sternocleidomastoid (clavicular head)

A

medial 1/3 of the clavicle

85
Q

insertion of sternocleidomastoid

A

mastoid process and superior nuchal line

86
Q

innervation of sternocleidomastoid

A

Accessory N. (CN XI)

87
Q

action of sternocleidomastoid

A

uni: tilts head to the same side and rotates head to the opposite side
bi: extends the head and aid in breathing when the head is fixed

88
Q

origin of anterior scalene

A

C3-C6 transverse process

89
Q

origin of middle scalene

A

C1-C2 transverse process, C3-C7 posterior tubercle of the transverse processes

90
Q

origin of posterior scalene

A

C5-C7 posterior tubercles of transverse processes

91
Q

insertion of anterior scalene

A

scalene tubercle of the 1st rib

92
Q

insertion of middle scalene

A

1st rib, behind the groove for the subclavian artery

93
Q

insertion of posterior scalene

A

outer surface of 2nd rib

94
Q

innervation of scalene

A

Direct branches from cervical and brachial plexuses (C3 to C8)

95
Q

action of scalene

A

With the ribs mobile,
elevates the upper ribs during forced respiration.

With the ribs fixed,

uni: bend the cervical spine ipsilaterally
bi: flex the neck.

96
Q

branches of axillary a.

A

superior thoracic, thoracoacromial, lateral thoracic, subscapular, anterior and posterior circumflex humeral

“HoTeL SPA”

97
Q

what kind of joint is glenohumeral?

A

ball and socket synovial

98
Q

what kind of joint is acromioclavicular?

A

plane synovial joint

99
Q

what kind of joint is the sternoclavicular?

A

saddle synovial