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Anatomy > Shoulder And Arm Muscles > Flashcards

Shoulder And Arm Muscles Flashcards

1
Q

Origin for trapezius

A

Superior nuchal line, external occipital protuberance, nuchal ligament, spinous processes C7-T12

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2
Q

Insertion for trapezius

A

Lateral clavicle, acromion process, scapular spine

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3
Q

Nerve for trapezius

A

Spinal accessory nerve (CN XI)

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4
Q

Action for trapezius

A

Upper part: elevates scapula;
Middle part: retracts scapula;
Lower part: depresses scapula

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5
Q

Origin for Latissumus dorsi

A

Spinous processes T7-T12, thoracolumbar fascia, iliac crest, inferior 4 ribs

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6
Q

Insertion for Latissumus dorsi

A

Floor of intertubercular groove

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7
Q

Nerve for Latissumus dorsi

A

Thoracodorsal nerve

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8
Q

Action for Latissumus dorsi

A

Extends, internally rotates, adducts shoulder

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9
Q

Origin for deltoid (anterior, lateral, posterior parts)

A

Anterior part: lateral 1/3 clavicle;
Lateral part: acromion process;
Posterior part: scapular spine

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10
Q

Insertion for deltoid (anterior, lateral, posterior parts)

A

Deltoid tuberosity

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11
Q

Nerve for deltoid (anterior, lateral, posterior parts)

A

Axillary nerve

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12
Q

Action for deltoid (anterior, lateral, posterior parts)

A

Anterior part: flexes and internally rotates shoulder;
Lateral part: abduct shoulder;
Posterior part: extends and externally rotates shoulder

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13
Q

Origin for rhomboid minor

A

Spinous processes of C7-T1, nuchal ligament

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14
Q

Insertion for rhomboid minor

A

Medial border of scapular superior to scapular spine

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15
Q

Nerve for rhomboid minor

A

Dorsal scapular nerve

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16
Q

Action for rhomboid minor

A

Retract and elevate scapula, depress glenoid fossa

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17
Q

Origin for rhomboid major

A

Spinous processes of T2-T5

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18
Q

Insertion for rhomboid major

A

Medial border of scapula inferior to scapular spine

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19
Q

Nerve for rhomboid major

A

Dorsal scapular nerve

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20
Q

Action for rhomboid major

A

Retract and elevate scapular, depress glenoid fossa

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21
Q

Origin for levator scapulae

A

Transverse processes of C1-C4

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22
Q

Insertion for levator scapulae

A

Medial border of scapula inferior to superior angle

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23
Q

Nerve for levator scapulae

A

Dorsal scapular nerve

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24
Q

Action for levator scapulae

A

Elevates scapula

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25
Q

Origin for pectoralis major

A

Clavicular head: medial 1/2 of clavicle
Sternocostal head: sternum, costal cartilages 1-6

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26
Q

Insertion for pectoralis major

A

Lateral lip of intertubercular groove

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27
Q

Nerve for pectoralis major

A

Lateral and medial pectoral nerves

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28
Q

Action for pectoralis major

A

Abducts and internally rotates shoulder
Clavicular head: flexes shoulder
Sternocostal head: extends shoulder from flexed position

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29
Q

Origin for pectoralis minor

A

Ribs 3-5 near costal cartilages

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30
Q

Insertion for pectoralis minor

A

Corocoid process

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31
Q

Nerve for pectoralis minor

A

Medial pectoral nerve

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32
Q

Action for pectoralis minor

A

Stabilizes scapula against thoracic wall and depresses scapula

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33
Q

Origin for subclavius

A

1st rib and its costal cartilage

34
Q

Insertion for subclavius

A

Inferior surface of clavicle

35
Q

Nerve for subclavius

A

Subclavian nerve

36
Q

Action for subclavius

A

Anchors clavicle to 1st rib and depresses clavicle

37
Q

Origin for Serratus anterior

A

Lateral parts of ribs 1-8

38
Q

Insertion for Serratus anterior

A

Anterior surface of medial scapular border

39
Q

Nerve for Serratus anterior

A

Long thoracic nerve

40
Q

Action for Serratus anterior

A

Protracts scapula

41
Q

Origin for Subscapularis

A

Subscapular fossa

42
Q

Insertion of the Subscapularis

A

Lesser tubercle of humerus

43
Q

Nerve for Subscapularis

A

Upper and lower Subscapular nerves

44
Q

Action of Subscapularis

A

Internally rotates shoulder

45
Q

Origin of Supraspinatus

A

Supraspinous fossa

46
Q

Insertion of Supraspinatus

A

Greater tubercle of humerus, posterior humerus

47
Q

Nerve for Supraspinatus

A

Suprascapular nerve

48
Q

Action for Supraspinatus

A

Initiates shoulder abduction

49
Q

Origin for Infraspinatus

A

Infraspinous fossa

50
Q

Insertion for Infraspinatus

A

Greater tubercle of humerus, posterior humerus

51
Q

Nerve for Infraspinatus

A

Suprascapular nerve

52
Q

Action for Infraspinatus

A

Externally rotates shoulder

53
Q

Origin for Teres minor

A

Upper 2/3 of lateral scapula border

54
Q

Insertion for Teres minor

A

Greater tubercle of humerus, posterior humerus

55
Q

Nerve for Teres minor

A

Axillary nerve

56
Q

Action for Teres minor

A

Externally rotates shoulder

57
Q

Origin for Teres major

A

Posterior surface of inferior angle of scapula

58
Q

Insertion for Teres major

A

Medial lip of intertubercular groove

59
Q

Nerve for Teres major

A

Lower Subscapular nerve

60
Q

Action for Teres major

A

Extends, adducts, and internally rotates shoulder

61
Q

Origin for coracobrachialis

A

Coracoid process

62
Q

Insertion for coracobrachialis

A

Medial mid-shaft humerus

63
Q

Nerve for coracobrachialis

A

Musculocutaneous nerve

64
Q

Action for coracobrachialis

A

Flexes and adducts shoulder

65
Q

Origin for biceps brachii (long and short heads)

A

Long head: supraglenoid tubercle
Short head: coracoid process

66
Q

Insertion for biceps brachii (long and short heads)

A

Radial tuberosity, deep forearm fascia

67
Q

Nerve for biceps brachii (long and short heads)

A

Musculocutaneous nerve

68
Q

Action for biceps brachii (long and short heads)

A

Supinates forearm, flexes elbow, weakly flexes shoulder

69
Q

Origin for brachialis

A

Distal 1/2 of anterior humerus

70
Q

Insertion for brachialis

A

Ulnar tuberosity

71
Q

Nerve for brachialis

A

Musculocutaneous nerve

72
Q

Action for brachialis

A

Flexes elbow in all positions

73
Q

Origin for triceps brachii (long, lateral, and short heads)

A

Long head: infraglenoid tubercle
Medial and lateral heads: posterior humerus

74
Q

Insertion for triceps brachii (long, lateral, and short heads)

A

Olecranon process

75
Q

Nerve for triceps brachii (long, lateral, and short heads)

A

Radial nerve

76
Q

Action for triceps brachii (long, lateral, and short heads)

A

Extends elbow; long head assists with extension and adduction of shoulder

77
Q

Origin of anconeus

A

Lateral epicondyle

78
Q

Insertion for anconeus

A

Lateral olecranon process

79
Q

Nerve for anconeus

A

Radial nerve

80
Q

Action for anconeus

A

Weakly extends elbow

Anatomy (8 decks)

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