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PT 504 Anatomy Lab > Anterior Shoulder - Axilla and Arm Muscles > Flashcards

Anterior Shoulder - Axilla and Arm Muscles Flashcards

1
Q

Pectoralis Major Clavicular Head Origin

A

anterior surface of medial half of clavicle

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2
Q

Pectoralis Major Insertion

A

Lateral lip of intertubercular sulcus of humerus

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3
Q

Pectoralis Major Action

A

Adducts and medially rotates the humerus; draws scapula anteriorly and inferiorly

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4
Q

Pectoralis Major Innervation

A

Lateral and medial pectoral nerves; clavicular head (C5,C6); sternocostal head (C7,C8,T1)

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5
Q

Pectoralis Minor Origin

A

3rd-5th ribs near their costal cartilages

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6
Q

Pectoralis Minor Insertion

A

Medial border and superior surface of coracoid process of scapula

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7
Q

Pectoralis Minor Action

A

Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

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8
Q

Pectoralis Minor Innervation

A

Medial Pectoral Nerve (C8,T1)

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9
Q

Serratus Anterior Origin

A

External surfaces of lateral parts of 1st-8th ribs

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10
Q

Serratus Anterior Insertion

A

Anterior surface of medial border of scapula

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11
Q

Serratus Anterior Action

A

Protracts the scapula and holds it against thoracic wall; rotates scapula

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12
Q

Serratus Anterior Innervation

A

Long thoracic nerve (C5,C6,C7)

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13
Q

Subclavius Origin

A

Junction of 1st rib and its costal cartilage

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14
Q

Subclavius Insertion

A

Inferior surface of middle third of clavicle

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15
Q

Subclavius Action

A

Anchors and depresses clavicle

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16
Q

Subclavius Innervation

A

Nerve to subclavius (C5,C6)

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17
Q

Corachobrachialis Origin

A

Tip of coracoid process of scapula

18
Q

Corachobrachialis Insertion

A

Middle third of medial surface of humerus

19
Q

Corachobrachialis Action

A

Helps flex and adduct arm; resists dislocation of shoulder

20
Q

Corachobrachialis Innervation

A

Musculocutaneous nerve (C5,C6,C7)

21
Q

Biceps Brachii Long head Origin

A

Supraglenoid tubercle of scapula

22
Q

Biceps Brachii insertion

A

Tuberosity of radius and bicipital aponeurosis

23
Q

Biceps Brachii action

A

Supinates forearm and flexes forearm when it is supinated; short head resists should dislocation

24
Q

Biceps Brachii short head origin

A

tip of coracoid process of scapula

25
Q

Biceps brachii innervation

A

Musculocutaneous nerve (C5,C6,C7)

26
Q

Brachialis origin

A

Distal half of anterior surface of humerus

27
Q

Brachialis insertion

A

Coronoid process and tuberosity of ulna

28
Q

Brachialis Action

A

Flexes forearm in all positions

29
Q

Brachialis Innervation

A

Musculocutaneous nerve (C5,C6) and radial nerve (C5,C7)

30
Q

Triceps brachii medial head origin

A

Posterior surface of humerus, inferior to radial groove

31
Q

triceps brachii lateral head origin

A

Posterior surface of humerus, superior to radial groove

32
Q

triceps brachii long head origin

A

Infraglenoid tubercle of scapula

33
Q

triceps brachii insertion

A

Proximal end of olecranon of ulna and fascia of forearm

34
Q

triceps brachii action

A

Chief extensor of forearm; long head resists dislocation of the humerus; especially important during adduction

35
Q

triceps brachii innervation

A

Radial nerve (C6,C7,C8)

36
Q

Anconeus origin

A

Lateral epicondyle of humerus

37
Q

Anconeus insertion

A

Lateral surface of olecranon and superior part of posterior surface of ulna

38
Q

Anconeus Action

A

Assists triceps in extending forearm; stabilizes elbow joint; may abduct ulna during pronation

39
Q

Anconeus Innervation

A

Radial nerve (C7,C8,T1)

40
Q

Pectoralis Major Sternocostal Head Origin

A

anterior surface of sternum; superior six costal cartilages; aponeurosis of external oblique

41
Q

Pectoralis Major Sternocostal head action

A

Extends the humerus from the flexed position

42
Q

Pectoralis Major Clavicular Head action

A

Flexes humerus

PT 504 Anatomy Lab (15 decks)

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