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Muscles Of The Shoulder Flashcards

1
Q

What is the origin of the biceps brachii?

A

Short head= apex of the coracoid process of the scapula
Long head=supraglenoid tubercle of the scapula

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2
Q

What is the insertion of the biceps brachii?

A

Radial tuberosity, antebrachial fascia

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3
Q

What is the Action of the biceps brachii?

A

Flexion and supination of the forearm
Flexion of the shoulder

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4
Q

What is the origin of the pectoralis major?

A

Medial 1/2 of the clavicle
manubrium
Sternal body
True ribs and their costal cartilages

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5
Q

What is the insertion of the pectoralis major?

A

Greater tubercle of the humerus

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6
Q

What is the action of the pectoralis major?

A

Arm adduction, medial rotation and flexion (clavicular head)
Arm extension (sternocostal head)

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7
Q

What is the origin of the anterior deltoid?

A

Lateral 1/3 of the clavicle
Acromion of the scapula
Spine the scapula

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8
Q

What is the insertion of the anterior deltoid?

A

Deltoid tuberosity of the humerus

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9
Q

What is the action of the anterior deltoid?

A

Medial rotation and flexion of the shoulder

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10
Q

What nerve innervates the anterior deltoid?

A

Axillary nerve

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11
Q

What nerve innervates the biceps brachii?

A

Musculocutaneous nerve

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12
Q

What is the origin of the coracobrachialis?

A

Coracoid process of the scapula

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13
Q

What is the insertion of the coracobrachialis?

A

Middle 1/3 of Medial aspect of the humerus

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14
Q

What is the action of the coracobrachialis?

A

Arm adduction and flexion

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15
Q

What is the innervation of the coracobrachialis?

A

Musculocutaneous nerve

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16
Q

What is the origin of the latissimus dorsi?

A

Spinous processes of T7-L5
Ribs 9-12
Iliac crest

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17
Q

What is the insertion of the latissimus dorsi?

A

Intertubercular sulcus of the humerus

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18
Q

What is the action of the latissimus dorsi?

A

Shoulder extension, adduction and medial rotation

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19
Q

What is the origin of the teres major?

A

Inferior angle of the scapula

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20
Q

What is the insertion of the teres major?

A

Lesser tubercle of the humerus

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21
Q

What is the action of the teres major?

A

Extension and medial rotation of the shoulder

22
Q

What is the origin of the posterior deltoid?

A

Lateral 1/3 of the clavicle
Acromion of scapula
Spine of scapula

23
Q

What is the insertion of the posterior deltoid?

A

Deltoid tuberosity of the humerus

24
Q

What is the action of the posterior deltoid?

A

Lateral rotation and extension of the shoulder

25
Q

What is the origin of the triceps?

A

Posterior aspect of the humerus
Infraglenoid tubercle of the scapula

26
Q

What is the insertion of the triceps?

A

Olecranon process of the ulna

27
Q

What is the action of the triceps?

A

Extension of the shoulder
Extension of the forearm

28
Q

What is the origin of the supraspinatus?

A

Supraspinous fossa of the scapula

29
Q

What is the insertion of the supraspinatus?

A

Greater tubercle of the humerus

30
Q

What is the action of the supraspinatus?

A

Abduction of the shoulder

31
Q

What is the origin of the teres minor?

A

Lateral border of the scapula

32
Q

What is the insertion of the teres minor?

A

Greater tubercle of the humerus

33
Q

What is the action of the teres minor?

A

Lateral rotation of the shoulder

34
Q

What is the origin of the infraspinatus?

A

Infraspinous fossa of the scapula

35
Q

What is the insertion of the infraspinatus?

A

Greater tubercle of the humerus

36
Q

What is the origin of the subscapularis?

A

Subscapular fossa of the scapula

37
Q

What is the insertion of the subscapularis?

A

Lesser tubercle of the humerus

38
Q

What is the action of the subscapularis?

A

Medial rotation of the shoulder

39
Q

What is the origin of the rhomboid major?

A

Spinous process of T2-T5

40
Q

What is the insertion of the rhomboid major?

A

Medial border of the scapula, inferior to the scapula spine

41
Q

What is the action of the rhomboid major?

A

Retracts and downwardly rotates the shoulder girdle

42
Q

What is the origin of the rhomboid minor?

A

Spinous processes of C7-T1

43
Q

What is the insertion of the rhomboid minor?

A

Medial border of the scapula, adjacent to the scapula spine

44
Q

What is the action of the rhomboid minor?

A

Retracts and downwardly rotates the shoulder girdle

45
Q

What is the origin of the serratus anterior?

A

Ribs 1-9 (external surfaces)

46
Q

What is the insertion of the serratus anterior?

A

Medial border of the scapula

47
Q

What is the action of the serratus anterior?

A

Protracts and upwardly rotates the shoulder girdle

48
Q

What is the origin of the pectoralis minor?

A

Ribs 3-5 (anterior ends)

49
Q

What is the insertion of the pectoralis minor?

A

Coracoid process of the scapula

50
Q

What is the action of the pectoralis minor?

A

Protracts and downwardly rotates the shoulder girdle

Muscles (6 decks)

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