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MSK > Shoulder girdle & joint > Flashcards

Shoulder girdle & joint Flashcards

1
Q

Origin of trapezius

A
  • Superior nuchal line
    • External occipital protuberance
    • Nuchal ligament
    • Spinous processes of C7 to T12
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2
Q

Insertion of trapezius

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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3
Q

Action of trapezius

A
  • Scapula elevation, scapula rotation during abduction (Upper)
    • Scapula retraction (Middle fibres)
    • Scapula depression (Lower fibres)
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4
Q

Innervation of trapezius

A

Accessory nerve (CN XI)

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5
Q

Origin of levator scapulae muscle

A

Transverse processes of C1-C4

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6
Q

Insertion of levator scapulae muscle

A

Superior border of the scapula

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7
Q

Action of levator scapulae muscle

A
  • Shoulder elevation
    • Assists in lateral rotation of the scapula
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8
Q

Innervation of levator scapulae muscle

A
  • Dorsal scapular nerve (C5)
    • Anterior rami of C3-C5 spinal nerves
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9
Q

Origin of rhomboid minor muscle

A
  • Lower end of nuchal ligament
    • Spinous process of C7 – T1
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10
Q

Insertion of rhomboid minor muscle

A
  • Medial border of the scapula
    • Until root of the spine of the scapula
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11
Q

Origin of rhomboid major muscle

A

Spinous process of T1 – T4

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12
Q

Insertion of rhomboid major muscle

A
  • Medial border of the scapula
    • Until the inferior angle of the scapula
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13
Q

Action of both rhomboid minor and major

A
  • Holds scapula against the thoracic wall
    • Retracts the scapula
    • Assists in elevation of the scapula
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14
Q

Insertion of both rhomboid minor and major

A

Dorsal scapular nerve (C4 - C5)

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15
Q

Origin of serattus anterior muscle

A

Finger-like processes from ribs 1 – 8 laterally

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16
Q

Insertion of serattus anterior muscle

A

Costal surface of the medial border of the scapula

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17
Q

Action of serattus anterior muscle

A
  • Holds scapula against the thoracic wall
  • Protraction and rotation (in abduction) of the scapula
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18
Q

Innervation of serattus anterior muscle

A

Long thoracic nerve (C5 - C7)

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19
Q

Origin of subclavius muscle

A

First rib and its costal cartilage

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20
Q

Insertion of subclavius muscle

A

Inferior surface of the middle 1/3 of the clavicle

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21
Q

Action of suvbclavius muscle

A

Anchors and depresses the clavicle

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22
Q

Innervation of subclavius muscle

A

Nerve to subclavius (C5 – C6)

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23
Q

Origin of pec major muscle

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
24
Q

Insertion of pec major muscle

A

Lateral lip of intertubercular sulcus of the humerus

25
Q

Action of pec major muscle

A
  • Adduction
    • Medial rotation
    • Clavicular fibres flex at the shoulder joint
26
Q

Innervation of pec major muscle

A

Medial and lateral pectoral nerves

27
Q

Origin of pec minor

A

Anterior surfaces and superior border of ribs 3 to 5

28
Q

Insertion of pec minor

A

Medial border of the coracoid process of the scapula

29
Q

Action of pec minor

A

Protracts and depresses shoulder

30
Q

Innervation of pec minor

A

Medial pectoral nerve

31
Q

Origin of latissimus dorsi muscle

A
  • Spinous processes of T7 to L5
    • Posterior surface of the sacrum
    • Posterior part of iliac crest
    • Rib 9 - 12
32
Q

Insertion of latissimus dorsi muscle

A

Floor of the intertubercular sulcus

33
Q

Action of latissimus dorsi muscle

A
  • Extension
    • Medial rotation
    • Adduction
34
Q

Innervation of latissimus dorsi muscle

A

Thoracodorsal nerve (C6 – C8)

35
Q

Origin of deltoid muscle

A
  • Anterior border of the lateral 1/3 of the clavicle
    • Inferior lip/edge of the spine of the scapula
    • Lateral border of acromion
36
Q

Insertion of deltoid muscle

A

Deltoid tuberosity of the humerus

37
Q

Action of deltoid muscle

A
  • Major abductor at the shoulder joint beyond 15°
    • Anterior fibres flex and medially rotate
    • Posterior fibres extend and laterally rotate
38
Q

Innervation of deltoid muscle

A

Axillary nerve (C5 – C6)

39
Q

Origin of teres major muscle

A
  • Posterior surface of the inferior angle of the scapula
    • On the lateral border
40
Q

Insertion of teres major muscle

A

Medial lip of the intertubercular groove

41
Q

Action of teres major muscle

A

Medial rotation and extension

42
Q

Innervation of teres major muscle

A

Lower subscapular nerve (C5 - C7)

43
Q

Origin of supraspinatus muscle

A

Supraspinous fossa

44
Q

Insertion of supraspinatus muscle

A

Superior facet of the greater tubercle of the humerus

45
Q

Action of supraspinatus muscle

A

Initiation of abduction

46
Q

Innervation of supraspinatus muscle

A

Suprascapular nerve (C5 – C6)

47
Q

Origin of infraspinatus muscle

A

Infraspinous fossa

48
Q

Insertion of infraspinatus muscle

A

Middle facet of the greater tubercle of the humerus

49
Q

Action of infraspinatus muscle

A

Lateral rotation

50
Q

Innervation of infraspinatus muscle

A

Suprascapular nerve (C5 – C6)

51
Q

Origin of teres minor muscle

A

Upper 2/3 of the posterior surface of the lateral border of the scapula

52
Q

Insertion of teres minor muscle

A

Inferior facet of the greater tubercle of the humerus

53
Q

Action of teres minor muscle

A

Lateral rotation

54
Q

Innervation of teres minor muscle

A

Axillary nerve (C5-C6)

55
Q

Origin of subscapularis muscle

A

Subscapular fossa

56
Q

Insertion of subscapularis muscle

A

Lesser tubercle of the humerus

57
Q

Action of subscapularis muscle

A

Adduction and medial rotation

MSK (10 decks)

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