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Anatomy > Lecture 8: Shoulder complex joint > Flashcards

Lecture 8: Shoulder complex joint Flashcards

1
Q

Action of supraspinatous

A

Works with deltoid in abduction of humerus, acts with other rotator cuff muscles in stabilizing shoulder joint

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2
Q

Superficial extrinsic muscles include and are innervated by

A 
Trapezius
Latissimus dorsi
Levator scapulae
Rhomboideus major
Rhomboideus minor
Innervated by CN XI/ventral rami
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3
Q

Glenohumeral joint articulating bones

A

Glenoid fossa of scapula

Head of humerous

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4
Q

Pectoralis minor innervation

A

Medial pectoral nerve

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5
Q

Cutaneous branches of dorsal rami penetrate what, supply what

A

Penetrate deep and superficial back muscles

Supply skin on either side of midline of back

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6
Q

Supraclavicular nerves come from? They supply which area

A

Cervical plexus C3-4

Supply skin over the clavicle and the superior-lateral aspect of pectoralis major

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7
Q

Action of teres minor

A

Laterally rotates humerus, helps hold humeral head in place

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8
Q

Levator scapulae innervation

A

Cervical nerves C3-C5 and dorsal scapular nerve

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9
Q

Blood supply of rhomboids

A

Dorsal scapular artery

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10
Q

Action of subclavius

A

Anchors and depresses clavicle

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11
Q

Supraspinatous innervation

A

Suprascapular nerve

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12
Q

Deltoid innervation

A

Axillary nerve

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13
Q

Glenohumeral ligaments

A

Glenohumeral (superior, middle, inferior)
Coracohumeral
Coracoacromial

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14
Q

Lateral coracoclavicular ligament name

A

Trapezoid ligament

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15
Q

Action of levator scapulae

A

Elevates to scapula at the superior angle and assists in the downward rotation of the scapula

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16
Q

Costoclavicular ligament function

A

Serves as axis for elevation and depression and for protraction and retraction
Main check for elevation

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17
Q

Blood supply of serratus anterior

A

Long thoracic artery

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18
Q

Distal attachment of deltoid

A

deltoid tuberosity of humerus

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19
Q

Muscle(s) involved in upward rotation of scapula

A

Serratus anterior

Upper and lower trapezius

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20
Q

Rotator cuff muscles

A

Supraspinatous
Infraspinatous
Teres minor
Subscapularis (SITS)

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21
Q

Blood supply of subscapularis

A

Suprascapular artery

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22
Q

Subscapularis innervation

A

upper and lower subscapular nerves

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23
Q

Articulating bones of sternoclavicular joint

A

Articular notch on sternum
Sternal end of clavicle
First costal cartilage

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24
Q

Teres major innervation

A

Lower subscapular nerve

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25
Q

Nerves supplying the shoulder

A

Supraclavicular nerves

Cutaneous branches of dorsal rami

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26
Q

Blood supply of latissimus dorsi

A

Thoracodorsal artery and a branch of the subscapular artery

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27
Q

Nerve involved in Serratus anterior paralysis

A

Long thoracic nerve

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28
Q

Functional type-sternoclavicular

A

Dairthrotic

Triaxial

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29
Q

Action of deltoid

A

Flexes, medially rotates, abducts, extends and laterally rotates humerus

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30
Q

Proximal attachment of subscapularis

A

Subscapular fossa of scapula (anterior surface)

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31
Q

Scapulohumeral musculature function

A

Attach the scapula to the humerus, move humerus and shoulder joint and contribute to stabilization of this joint

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32
Q

Distal attachment of serratus anterior

A

Anterior surface of medial border of scapula

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33
Q

Subclavius origin

A

Junction of first rib and costal cartilage 1

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34
Q

Innervation of scapulohumeral muscles

A

Brachial plexus

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35
Q

Muscle(s) involved in abduction of scapula

A

Serratus anterior

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36
Q

Infraspinatous blood supplly

A

Suprascapular artery

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37
Q

Action of pectoralis minor

A

Draws scapula inferiorly and anteriorly against thoracic wall (stabilizes scapula)

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38
Q

Trapezius innervated by

A

CN XI and ventral rami of 3/4th cervical nerves

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39
Q

Rhomboids innervation

A

Dorsal scapular nerve

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40
Q

Distal attachment of levator scapulae

A

Medial border of scapula at level of and above the spine

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41
Q

Scapulohumeral muscles include

A

Deltoid
Teres minor
Serratus anterior

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42
Q

Coracoacromial arch consists of

A

Acromion process
Coracoid process
Coracoacromial ligament

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43
Q

Innervation of subclavius

A

Nerve to subclavius

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44
Q

Distal attachment of subscapularis

A

Lesser tubercle of humerus

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45
Q

Blood supply of teres major

A

Circumflex scapular artery

46
Q

Innervation of pectoralis major

A

Lateral and medial pectoral nerves

47
Q

Acromioclavicular joint- articulating bones

A

Concave facet on acromion process

Convex facet on lateral end of clavical

48
Q

Distal attachment of infraspinatous

A

Middle facet of greater tubercle of humerus

49
Q

Infraspinatous innervation

A

Suprascapular nerve

50
Q

Proximal attachment of deltoid

A

Lateral third of clavicle, acromion process and spine of scapula

51
Q

Degrees of should abduction contributed by scapulothoracic movment

A

60 degrees
Sternoclavicular joint-40 degrees
Acromioclavicular joint- 20 degrees

52
Q

Trapezius muscle actions upper through lower

A

Upper- elevates scapula (shrug)
Middle- adducts scapula
Lower- Depresses scapula
Upper/lower combo- upwardly rotate scapula

53
Q

Distal attachment of teres minor

A

Inferior facet of greater tubercle of humerus

54
Q

Structureal type of joint-sternoclavicular

A

Synovial joint
Shallow, saddle
Articular disc

55
Q

Contents of quadrilateral space

A

Axillary nerve

Posterior circumflex humeral artery

56
Q

Action of infraspinatous

A

Laterally rotates humerus, helps hold humeral head in place

57
Q

Functional type-acromioclavicular joint

A

Triaxial
Diarthrotic
Gliding and rotation of scapula on clavicle

58
Q

Degrees of shoulder abduction contributed by glenohumeral joint

A

120 degrees

59
Q

Most common muscle torn in rotator cuff

A

Supraspinatous

60
Q

Proximal attachment of teres major

A

Posterior surface of inferior angle of scapula

61
Q

Proximal attachment of teres minor

A

Middle part of lateral border of scapula

62
Q

Scapulohumeral rhythm

A

Refers to relatively uninterrupted movement of upper extermity from dependent position to full abduction

63
Q

Muscle(s) involved in elevation of scapula

A

Levator scapulae and rhomboids

64
Q

Glenohumeral joint capsule is ___ ____ and allows

A

Very lax

up to an inch of passive distraction

65
Q

Muscle(s) involved in depression of scapula

A

Latissimus dorsi

66
Q

Steps in arm abduction- first few degrees of abduction

A

Supraspinatous

67
Q

Sternoclavicular ligaments

A

Anterior/posterior sternoclavicular ligaments
Costoclavicular ligament
Interclavicular ligament

68
Q

Distal attachment supraspinatous

A

Superior facet of greater tubercle of humerous

69
Q

Shoulder complex components

A

Scapulothoracic joint

Coracoacromial arch

70
Q

Medial coracoclavicular ligament name

A

Conoid ligament

71
Q

Action of serratus anterior

A

Protracts scapula, fixes scapula to thoracic wall, rotates scapula

72
Q

Blood supply of levator scapulae

A

Dorsal scapular artery

73
Q

Steps in arm abduction- snubbing of head of humerus into glenoid fossa

A

Rotator cuff muscles

74
Q

Blood supply of trapezius

A

Dorsal scapular artery

75
Q

Rhomboids action

A

Adducts scapula, rotates glenoid fossa downward, fixes scapula to thoracic wall

76
Q

Steps in arm abduction- external rotation of humerus

A

Infraspinatous

77
Q

Insertion of pectoralis minor

A

Coracoid process

78
Q

Proximal attachment infraspinatous

A

Infraspinous fossa of scapula

79
Q

Action of teres major

A

Adducts and medially rotates humerus

80
Q

Teres minor blood supply

A

Circumflex scapular artery

81
Q

Distal attachments of trapezius- upper through lower

A

Upper-lateral third of clavicle
Middle- Acromion and crest of scapular spine
Lower- tubercle of scapular spine

82
Q

Distal attachment of latissimus dorsi

A

Floor of intertubercular (bicipital) groove

83
Q

Distal attachment of rhomboid

A

Medial border of scapula from level of the spine inferiorly to the inferior angle

84
Q

Quadrilateral space bounderies

A

Inferior glenohumeral capusle
Teres major
Triceps longus
Surgical neck of humerus

85
Q

Anterior/posterior sternoclavicular ligaments function

A

Reinforce the capsule and check anterior posterior movement of clavicular head

86
Q

Proximal attachment of serratus anterior

A

External surface of lateral parts of ribs 1-8

87
Q

Teres minor innervation

A

Axillary nerve

88
Q

Nerve involved in Deltoid paralysis

A

Axillary nerve

89
Q

Structural type-acromioclavicular joint

A

Synovial

Plane

90
Q

Action of subscapularis

A

Medially rotates and adducts humerus

Helps hold humeral head in place

91
Q

Superior/inferior acromioclavicular ligaments function

A

They reinforce the joint capsule

They are weak

92
Q

Muscle(s) involved in downward rotation of scapula

A

Rhomboids

Levator scapulae

93
Q

Steps in arm abduction -movment of scapula

A

Serratus anterior clamps scapula to thoracic wall

94
Q

Action of latissimus dorsi muscle

A

Extends, adducts and internally rotates the humerus

95
Q

Ratio of Glenohumeral rotation contribution to Scapulothoracic rotation contribution

A

2:1

96
Q

Acromioclavicular ligaments

A

Superior and inferior acromioclavicular ligaments

Coracoclavicular (trapezoid-lateral, conoid-medial)

97
Q

Blood supply of deltoid

A

Deltoid branch of thoracoacromial artery

98
Q

Serratus anterior innervation

A

Long thoracic nerve

99
Q

Supraspinatous blood supply

A

Suprascapular artery

100
Q

Pectoralis minor origin

A

Ribs 3-5 near costal cartilages

101
Q

Muscle(s) involved in abduction of shoulder

A

Middle deltoid

Biceps brachii assists

102
Q

Glenoid labrum

A

Fibrocartilege meniscus

Deepens articulating surface of glenoid fossa

103
Q

Origin of pectoralis major

A

Anterior surface of the medial half of the clavicle
Anterior surface off the manubrium and body of the sternum
Costal cartilages 2-6
Aponeurosis of the external oblique

104
Q

Supraspinatous proximal attachment

A

Supraspinous fossa of scapula

105
Q

Distal attachment of teres major

A

Medial lip of intertubercular groove of humerus (crest of lesser tubercle)

106
Q

Latissimus dorsi innervation

A

Thoracodorsal nerve c6-c8

107
Q

Insertion of subclavius

A

Inferior surface of middle third of clavicle

108
Q

Coracoclavicular ligament function

A

Provides joint stability and is stronger than the clavicle itself

109
Q

Pectoralis major insertion

A

Lateral lip of the intertubercular groove = crest of greater tubercle

110
Q

Action of pectoralis major

A

Adducts and medially rotates humerus
Flexes arm
Extends arm from flexed position
Draws scapula anteriorly and inferiorly

Anatomy (34 decks)

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