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Musculoskeletal System > Muscles Of Upper Arm And Shoulder > Flashcards

Muscles Of Upper Arm And Shoulder Flashcards

1
Q

What is the insertion of the subclavius?

A

The acromial end of the clavicle - inferior

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2
Q

What is the action of the subclavius?

A

Pulls tip of shoulder down and pulls clavicle medially

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3
Q

What is the nerve supply to the subclavius?

A

Nerve to subclavius

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4
Q

What is the arterial supply to the subclavius?

A

Clavicular branch of the thoracoacromial artery

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5
Q

What is the origin of the subscapularis?

A

Subscapular fossa of the scapula

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6
Q

What is the insertion of the subscapularis?

A

Lesser tubercle of the humerus

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7
Q

What is the action of the subscapularis?

A

Internal rotation at shoulder

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8
Q

What is the nerve supply to the subscapularis?

A

Subscapular nerve

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9
Q

What is the arterial supply to the subscapularis?

A

Subscapular artery

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10
Q

The tendons of which 4 muscles make up the rotator cuff of the shoulder joint?

A

Subscapularis, supraspinatus, infraspinatus and teres minor

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11
Q

What is the origin of the coracobrachialis?

A

Coracoid process of the scapula

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12
Q

What is the insertion of the coracobrachialis?

A

Upper one third of the frontal humerus

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13
Q

What is the action of the coracobrachialis?

A

Flexion and adduction at shoulder

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14
Q

What is the nerve supply to the coracobrachialis?

A

Musculocutaneous nerve

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15
Q

What is the arterial supply to the coracobrachialis?

A

Brachial artery

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16
Q

What is the origin of the supraspinatus?

A

Supraspinous fossa of the scapula

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17
Q

What is the insertion of the supraspinatus?

A

Greater tubercle of the humerus

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18
Q

What is the action of supraspinatus?

A

Abduction of the arm to 15 degrees

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19
Q

What is the nerve supply to the supraspinatus?

A

Suprascapular nerve

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20
Q

What is the arterial supply to the supraspinatus?

A

Suprascapular artery

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21
Q

What is the origin of the infraspinatus?

A

Infraspinous fossa of scapula

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22
Q

What is the insertion of the infraspinatus?

A

greater tubercle of the humerus

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23
Q

What is the action of the infraspinatus?

A

External rotation of arm

24
Q

What is the nerve supply to the infraspinatus?

A

Suprascapular nerve (C5, C6)

25
Q

What is the arterial supply to the infraspinatus?

A

circumflex scapular artery and suprascapular artery

26
Q

What is the origin of teres minor?

A

Upper two thirds of lateral margin of scapula

27
Q

What is the insertion of teres minor?

A

Greater tubercle of humerus

28
Q

What is the action of teres minor?

A

External rotation

29
Q

What is the nerve supply to teres minor?

A

Axillary nerve

30
Q

What is the arterial supply to teres minor?

A

Circumflex scapular artery and posterior circumflex humeral artery

31
Q

What is the origin of the long head of biceps brachii?

A

Supraglenoid tubercle of scapula

32
Q

What is the insertion of the long head of biceps brachii?

A

Radial tuberosity

33
Q

What is the action of the long head of biceps brachii?

A

Flexion of elbow and shoulder, supinator of forearm

34
Q

What is the nerve supply to the long head of biceps brachii?

A

Musculocutaneous nerve

35
Q

What is the arterial supply to the long head of biceps brachii?

A

Brachial artery

36
Q

What is the origin of the short head of biceps brachii?

A

Coracoid process of scapula

37
Q

What is the insertion of the short head of biceps brachii?

A

Radial tuberosity

38
Q

What is the action of the short head of biceps brachii?

A

Flexion of elbow and shoulder, supination of forearm

39
Q

What is the nerve supply to the short head of biceps brachii?

A

Musculocutaneous nerve

40
Q

What is the arterial supply to the short head of biceps brachii?

A

brachial artery

41
Q

What is the origin of the deltoid?

A

Acromion, crest of the spine of the scapula and the lateral one third of the clavicle

42
Q

What is the insertion of the deltoid?

A

Deltoid tuberosity of the humerus

43
Q

What is the action of the deltoid?

A

Abduction
Via anterior fibres = Flexion
Via posterior fibres = Extension

44
Q

What is the nerve supply to the deltoid?

A

Axillary nerve

45
Q

What is the arterial supply to the deltoid?

A

Posterior circumflex humeral artery

46
Q

What is the origin of the teres major?

A

Dorsal surface of the inferior angle of the scapula

47
Q

What is the insertion of teres major?

A

Crest of the lesser tubercle of the humerus

48
Q

What is the action of teres major?

A

Internal rotation, adduction and extension of shoulder

49
Q

What is the nerve supply to teres major?

A

Subscapular nerve

50
Q

What is the arterial supply to teres major?

A

Circumflex scapular artery and subscapular artery

51
Q

What is the origin of the subclavius?

A

Costal cartilage and first rib

52
Q

What is the origin of the brachialis?

A

Distal anterior humerus

53
Q

What is the insertion of the brachialis?

A

Coronoid process of ulna

54
Q

What is the action of brachialis?

A

Flexion at elbow

55
Q

What is the nerve supply to brachialis?

A

Musculocutaneous nerve

56
Q

What is the arterial supply to brachialis?

A

Brachial artery

57
Q

Where does the triceps insert?

A

Olecranon fossa

Musculoskeletal System (26 decks)

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