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Anatomy Flashcards > Shoulder Muscles (origins, insertions, actions, innervation) > Flashcards

Shoulder Muscles (origins, insertions, actions, innervation) Flashcards

1
Q

Trapzius: Insertion

A

Posterior 1/3 clavicle

Medial border acromion; upper border scapular spine

Triangular space base of scapular spine

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2
Q

Trapezius: Origin

A

External occipital protuberance; Ligamentum nuchae

Spinous C7-T3

Spinous T4-T12

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3
Q

Trapezius: Actions

A

Elevation scapula

Retraction scapula

Upward rotation scapula

Depression scapula

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4
Q

Trapezius: Innervation

A

Accessory Nerve (CN XI)

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5
Q

Latissimus dorsi: Origin

A

Spinous T6-T12

Lumbar and sacral vertebrae

Posterior iliac crest

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6
Q

Latissimus dorsi: Insertion

A

Medial lip and floor of intertubercle groove of humerus

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7
Q

Latissimus dorsi: Actions

A

Extension arm

Adduction arm

Internal rotation glenohumeral

Horizontal abduction glenohumeral

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8
Q

Latissimus dorsi: Innervation

A

Thoracodorsal nerve

(C6-C8)

Brachial plexus: Posterior

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9
Q

Levator scapulae: Origin

A

Transverse process C1-C4

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10
Q

Levator scapulae: Insertion

A

Superior angle-Medial border scapula above spine base

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11
Q

Levator scapula: Actions

A

Elevate scapula

downward rotate/adduction

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12
Q

Levator scapulae: Innervation

A

Dorsal scapular nerve (C5)

(C3,C4)

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13
Q

Rhomboid minor: Origin

A

Lower ligamentum nuachae

Spinous C7-T1

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14
Q

Rhomboid minor: Insertion

A

Medial border scapula base of spine

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15
Q

Rhomboid minor: Actions

A

Elevation scapula

Retraction scapula

Downward rotation glenohumeral

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16
Q

Rhomboid minor: Innervation

A

Dorsal scapular nerve

(C5)

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17
Q

Rhomboid major: Origin

A

Spinous T2-T5

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18
Q

Rhomboid major: Insertion

A

Medial border scapula below minor

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19
Q

Rhomboid major: Actions

A

Elevation of scapula

Retraction of scapula

Downward roation glenohumeral

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20
Q

Rhomboid major: Innervation

A

Dorsal scapular nerve

(C5)

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21
Q

Serratus anterior: Origin

A

Anterior Ribs 1-8

Anteriolateral thoracic wall

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22
Q

Serratus anterior: Insertion

A

Inferior angle: anterior medial border scapula

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23
Q

Serratus anterior: Actions

A

Protraction of scapula

Upward rotation glenoid cavity

Holds medial border against thoracic

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24
Q

Serratus anterior: Innervation

A

Long thoracic nerve

(C5-C7)

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25
Q

Deltoid: Origin

A

Anteriolateral 1/3 clavicle

Lateral aspect of acromion

Inferior spine of scapula

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26
Q

Deltoid: Insertion

A

Deltoid tuberosity of humerus

27
Q

Deltoid: Actions

A

Flexion/Internal rotation of arm (horiz/diag add)

Abduction (horiz abd)

Extension/External rotation of arm (horiz/diag abd)

28
Q

Deltoid: Innervation

A

Axillary nerve

(C5,C6)

Brachial Plexus: Posterior

29
Q

Sternocleidomastoid: Origin

A

Sternum (tendinous head)

Medial 1/3 clavicle (muscular head)

30
Q

Sternocleidomastoid: Insertion

A

Mastoid of skull

31
Q

Sternocleidomastoid: Actions

A

Head flexion same side

Head internal rotation

32
Q

Sternocleidomastoid: Innervation

A

Accessory nerve (CN XI)

33
Q

Subclavius: Origin

A

1 Rib

34
Q

Subclavius: Insertion

A

Undersurface clavicle

35
Q

Subclavius: Actions

A

Depress clavicle

Maintain sternoclavicular joint

36
Q

Subclavius: Innervation

A

Nerve to subclavius

(C5,C6)

37
Q

Supraspinatus: Origin

A

Medial 2/3 supraspinous fossa

38
Q

Supraspinatus: Insertion

A

Superior greater tubercle of humerus

39
Q

Supraspinatus: Action

A

Abduction of arm

40
Q

Supraspinatus: Innervation

A

Suprascapular nerve

(C5,C6)

*Brachial Plexus: Upper *

41
Q

Infraspinatus: Origin

A

Medial infraspinatus fossa

42
Q

Infraspinatus: Insertion

A

Greater tubercle of humerus below supraspinatus

43
Q

Infraspinatus: Actions

A

Extension of arm

External rotation of arm

(Horiz/diag abd arm)

44
Q

Infraspinatus: Innervation

A

Suprascapular nerve

(C5,C6)

Brachial Plexus: Upper

45
Q

Teres minor: Origin

A

Upper 2/.3 lateral border scapula

46
Q

Teres minor: Insertion

A

Greater tubercle of humerus below infraspinatus

47
Q

Teres minor: Actions

A

Extension arm

External rotation of arm

(horiz/diag abd of arm)

48
Q

Teres minor: Innervation

A

Axillary nerve

(C5,C6)

Brachial Plexus: Posterior

49
Q

Teres major: Origin

A

Posterior inferior angle of scapula

50
Q

Teres major: Insertion

A

Medial lip intertubicular groove

51
Q

Teres major: Actions

A

Extension of arm

Internal rotation of arm

Adduction of arm

52
Q

Teres major: Innervation

A

Lower subscapular nerve

(C5,C6)

Brachial plexus: Posterior

53
Q

Subscapularis: Origin

A

Subscapular fossa of anterior scapula

54
Q

Subscapularis: Insertion

A

Lesser tubercle (crest) of humerus

55
Q

Subscapularis: Actions

A

Internal rotation of arm

  • Extension of arm*
  • Adduction of arm*
56
Q

Subscapularis: Innervation

A

Upper and lower subscapular nerve

(C5,C6)

Brachial Plexus: Posterior

57
Q

Pectoralis major: Origin

A

Medial anterior 1/3 clavicle

Anterior costal cartilate rib 1-6

Sternum

58
Q

Pectoralis major: Insertion

A

Lateral lip intertubicular groove

(crest greater tubercle)

59
Q

Pectoralis major: Actions

A

Internal rotation, Adduction

Flexion (clavicular fibers)

Extension (sternocostal fibers)

horiz/diag add

60
Q

Pectoralis major: Innervation

A

Medial pectoralis nerve (C8, T1): Medial

Lateral pectoralis nerve (C5-C7): Lateral

61
Q

Pectoralis minor: Origin

A

Anterior ribs 3-5

62
Q

Pectoralis minor: Insertion

A

Coracoid process of scapula

63
Q

Pectoralis minor: Actions

A

Depress shoulder

Down rotation of scapula

Abduct

64
Q

Pectoralis minor: Innervation

A

Medial pectoralis nerve

(C8, T1)

Brachial Plexus: Medial

Anatomy Flashcards (13 decks)

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