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YBOD200 > Shoulder girdle and shoulder joint > Flashcards

Shoulder girdle and shoulder joint Flashcards

1
Q

which articulation forms the shoulder (glenohumeral) joint??

A

head of humerus and glenoid fossa of scapula

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2
Q

what covers each articular surface

A

hyaline cartilage

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3
Q

what does the fibrous membrane of a joint capsule attach to

A

attaches to margin of the glenoid cavity

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4
Q

where ligaments lie anterosuperiorly

A

superior,middle, and inferior glenohumeral ligaments

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5
Q

what deepens the glenoid cavity

A

fibrocartilaginous disc

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6
Q

what does the glenoid labrum attach

A

to the margin of the glenoid fossa

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7
Q

where does the fibrous membrane of joint capsule attach

A
  • Attaches to margin of the glenoid cavity
    • Outside attachment of the glenoid labrum and
      long head of triceps brachii muscle tendon
    • As well as anatomical neck of the humerus
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8
Q

how does the ligament form

A

by thickening of the fibrous membrane

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9
Q

where the coracohumeral ligament lie

A

Coracohumeral ligament lies superiorly between the base of the coracoid process and the greater tubercle of the humerus

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10
Q

transverse humeral ligament lie

A

between greater and lesser tubercles of the humerus

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11
Q

coraco-acromial ligament

A

between coracoid process and acromion process

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12
Q

how does bursae form

A

synovial membrane protrudes through to form bursae

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13
Q

function of bursae

A

to reduce friction between tendons and other structures

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14
Q

most consistent form of bursae

A

subtendinous bursa-between subscapularis muscle and fibrous membrane

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15
Q

location of subacrimonal (subdeltoid) bursa

A

-between acromion and supraspinatus muscle
- between deltoid and supraspinatus muscles

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16
Q

aterial blood supply

A
  • Branches of anterior and posterior circumflex humeral arteries
    • Branches of suprascapular arteries
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17
Q

innervation

A
  • Posterior cord of the brachial plexus
    • Suprascapular, axillary and lateral pectoral nerves
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18
Q

what forms the shoulder girdle

A

the scapula and clavicle

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19
Q

what does the girdle link

A

it is the link between the thorax and upper limb

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20
Q

origion of trapezius muscle

A
  • Superior nuchal line
    • External occipital protuberance
    • Nuchal ligament
    • Spinous processes of C7 to T1
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21
Q

insertion of trapezius muscle

A
  • Upper fibres on lateral 1/3 of the clavicle
    • Middle fibres on acromion and scapula spine
    • Lower fibres on tubercle of scapula spine
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22
Q

action of trapezius muscle

A
  • Scapula elevation, scapula rotation during abduction (Upper)
    • Scapula retraction (Middle fibres)
    • Scapula depression (Lower fibres)
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23
Q

innervation of trapezius

A
  • Accessory nerve (CN XI)
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24
Q

levator scapulae muscle
origin

A
  • Transverse processes of C1-C4
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25
Q

insertion

A
  • Superior border of the scapula
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26
Q

action

A
  • Shoulder elevation
    • Assists in lateral rotation of the scapula
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27
Q

innervation

A
  • Dorsal scapular nerve (C5)
    • Anterior rami of C3-C5 spinal nerves
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28
Q

rhamboid minor muscle

A

lies deep to trapezius

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29
Q

origin

A
  • Lower end of nuchal ligament
    • Spinous process of C7 – T1
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30
Q

insertion

A
  • Medial border of the scapula
    • Until root of the spine of the scapula
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31
Q

rhamboid major muscle

A

lies deep to trapezius, inferior to the rhamboid minor

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32
Q

origin

A

spinous process of T1-T4

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33
Q

insertion

A
  • Medial border of the scapula
    • Until the inferior angle of the scapula
34
Q

rhamboid minor and major action

A
  • Holds scapula against the thoracic wall
    • Retracts the scapula
    • Assists in elevation of the scapula
35
Q

rhomboid minor and major innervation

A
  • Dorsal scapular nerve (C4 - C5)
36
Q

serratous anterior muscle origin

A
  • Finger-like processes from ribs 1 – 8 laterally
37
Q

insertion

A
  • Costal surface of the medial border of the scapula
38
Q

actions

A
  • Holds scapula against the thoracic wall
  • Protraction and rotation (in abduction) of the scapula
39
Q

innervation

A
  • Long thoracic nerve (C5 - C7)
40
Q

subclavius muscle-origin

A
  • First rib and its costal cartilage
41
Q

insertion

A
  • Inferior surface of the middle 1/3 of the clavicle
42
Q

action

A
  • Anchors and depresses the clavicle
43
Q

innervation

A
  • Nerve to subclavius (C5 – C6)
44
Q

pectoralis major muscle lie

A

lie deep to the breast

45
Q

pectoralis major muscle lie

A

lie deep to the breast, separated from it via the deep fascia

46
Q

what are the 3 origins of the pectoralis major muscles

A
  • Anterior border of the medial half of the clavicle
    • Anterior surface of the sternum and ribs 1-7 costal cartilage
    • Aponeurosis of the External oblique muscle
47
Q

insertion of pectoralis major muscle

A
  • Lateral lip of intertubercular sulcus of the humerus
48
Q

action of pect. major

A
  • Adduction
    • Medial rotation
    • Clavicular fibres flex at the shoulder joint
49
Q

innervation

A
  • Medial and lateral pectoral nerves
50
Q

pectoralis minor muscle origin

A
  • Anterior surfaces and superior border of ribs 3 to 5
51
Q

pect. minor muscles

A
  • Medial border of the coracoid process of the scapula
52
Q

pect. minor action

A
  • Protracts and depresses shoulder
53
Q

pect. minor innervation

A

by the medial pectoral nerve

54
Q

latissimus dorsi muscle origin

A
  • Spinous processes of T7 to L5
    • Posterior surface of the sacrum
    • Posterior part of iliac crest
    • Rib 9 - 12
55
Q

LD muscle insertion

A
  • Floor of the intertubercular sulcus
56
Q

LD muscle action

A
  • Extension
    • Medial rotation
    • Adduction
57
Q

LD muscle innervation

A
  • Thoracodorsal nerve (C6 – C8)
58
Q

deltoid muscle origin

A
  • Anterior border of the lateral 1/3 of the clavicle
    • Inferior lip/edge of the spine of the scapula
    • Lateral border of acromion
59
Q

deltoid muscle insertion

A
  • Deltoid tuberosity of the humerus
60
Q

deltoid muscle

A
  • Major abductor at the shoulder joint beyond 15°
    • Anterior fibres flex and medially rotate
    • Posterior fibres extend and laterally rotate
61
Q

deltoid muscle innervation

A
  • Axillary nerve (C5 – C6)
62
Q

teres major muscle origin

A
  • Posterior surface of the inferior angle of the scapula
    • On the lateral border
63
Q

TM muscle insertion

A
  • Medial lip of the intertubercular groove
64
Q

TM muscle action

A
  • Medial rotation and extension
65
Q

TM muscle innervation

A
  • Lower subscapular nerve (C5 - C7)
66
Q

supraspinatus muscle(rotator cuff) origin

A
  • Supraspinous fossa
67
Q

Supraspinatus muscle insertion

A
  • Superior facet of the greater tubercle of the humerus
68
Q

supraspinatus action

A
  • Initiation of abduction
69
Q

supraspinatus innervation

A
  • Suprascapular nerve (C5 – C6)
70
Q

infraspinatus muscle (rotator cuff) origin

A

infraspinous fossa

71
Q

infraspinatus muscle insertion

A
  • Middle facet of the greater tubercle of the humerus
72
Q

infraspinatus muscle action

A

lateral rotation

73
Q

infraspinatus muscle innervation

A
  • Suprascapular nerve (C5 – C6)
74
Q

teres minor muscle( rotator cuff) origin

A
  • Upper 2/3 of the posterior surface of the lateral border of the scapula
75
Q

teres minor insertion

A
  • Inferior facet of the greater tubercle of the humerus
76
Q

teres minor action

A
  • Lateral rotation
77
Q

teres minor innervation

A
  • Axillary nerve (C5-C6)
78
Q

subscapularis muscle (rotator cuff) origin

A

subscapular fossa

79
Q

subscapularis muscle insertion

A
  • Lesser tubercle of the humerus
80
Q

subscapularis muscle action

A
  • Adduction and medial rotation
81
Q

subscapularis muscle innervation

A
  • Upper and lower subscapular nerves (C5-C6)

YBOD200 (5 decks)

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