Anterior Shoulder - Axilla and Arm Muscles Flashcards Preview

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Flashcards in Anterior Shoulder - Axilla and Arm Muscles Deck (62)
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1

Pectoralis Major- Clavicular Head Origin

Anterior surface of medial half of clavicle

2

Pectoralis Major- Clavicular Head Insertion

Lateral lip intertubercular sulcus of humerus

3

Pectoralis Major- Clavicular Head Innervation

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

4

Pectoralis Major- Clavicular Head Action

Both heads adducts and medially rotates humerus; draws scapula anteriorly and inferiorly. Clavicular head flexes humerus

5

Pectoralis Major- Sternocostal Head Origin

Anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscle

6

Pectoralis Major- Sternocostal Head Insertion

Lateral lip intertubercular sulcus of humerus

7

Pectoralis Major- Sternocostal Head Innervation

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

8

Pectoralis Major- Sternocostal Head Action

Both heads adducts and medially rotates humerus; draws scapula anteriorly and inferiorly. Sternocostal head extends it from the flexed position

9

Serratus Anterior Origin

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

10

Serratus Anterior Insertion

Anterior surface of medial border of scapula

11

Serratus Anterior Innervation

Long thoracic nerve

12

Serratus Anterior Action

Protracts scapula and holds it against thoracic wall; rotates scapula

13

Serratus Anterior Root

C5,C6,C7

14

Subclavius Origin

Junction of 1st rib and its costal cartilage

15

Subclavius Insertion

Inferior surface of middle third of clavicle

16

Subclavius Innervation

Nerve to subclavius (C5,C6)

17

Subclavius Root

C5,C6

18

Coracobrachialis Origin

Tip of coracoid process of scapula

19

Coracobrachialis Insertion

Middle third of medial surface of humerus

20

Coracobrachialis Innervation

Musculocutaneous nerve (C5,C6,C7)

21

Coracobrachialis Action

Helps flex and adduct arm; resists dislocation of shoulder

22

Biceps Brachii - Short Head Origin

Tip of coracoid process of scapula

23

Biceps Brachii - Short Head Insertion

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

24

Biceps Brachii - Short Head Innervation

Musculocutaneous nerve (C5,C6,C7)

25

Biceps Brachii - Short Head Action

Supinates forearm and, when it is supinated, flexes elbow, short head resists dislocation of shoulder

26

Biceps Brachii - Long Head Origin

Supraglenoid tubercle of scapula

27

Biceps Brachii - Long Head Insertion

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

28

Biceps Brachii - Long Head Innervation

Musculocutaneous nerve (C5,C6,C7)

29

Biceps Brachii - Long Head Action

Supinates forearm and, when it is supinated, flexes elbow

30

Brachialis Origin

Distal half of anterior surface of humerus