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Flashcards in Movements of the Arm Deck (36)
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1

Pectoralis major origin?

sternal end of clavicle, sternum, cartilage of ribs 1-6, & aponeurosis of external oblique muscle

2

Latissimus dorsi origin?

indirectly via lumbodorsal fascia into spines of T7-L5, lower 4 ribs & iliac crest

3

Deltoid origin?

lateral 3rd of clavicle, acromion & spine of scapula

4

Supraspinatus origin?

supraspinous fossa of scapula

5

Infraspinatus origin?

infraspinous fossa of scapula

6

Subscapularis origin?

subscapular fossa of scapula

7

Teres minor origin?

lateral border of dorsal scapular surface

8

Teres major origin?

posterior surface of scapula at inferior angle

9

Coracobrachialis origin?

coracoid process of scapula

10

Pectoralis major insertion?

by a short tendon into intertubercular groove of humerus

11

Latissimus dorsi insertion?

floor of intertubercular groove of humerus

12

Deltoid insertion?

deltoid tuberosity of humerus

13

Supraspinatus insertion?

superior part of greater tubercle of humerus

14

Infraspinatus insertion?

greater tubercle of humerus, posterior to supraspinatus

15

Subscapularis insertion?

lesser tubercle of humerus

16

Teres minor insertion?

greater tubercle of humerus, inferior to infraspinatus

17

Teres major insertion?

intertubercular groove of humerus, tendon fused with tendon of latissimus dorsi

18

Coracobrachialis insertion?

medial surface of humerus shaft

19

Pectoralis major action?

prime mover of arm flexion
agonist of arm flexion
rotates arm medially
adducts arm against resistance

20

Latissimus dorsi action?

prime mover of arm extension
agonist of arm extension
powerful arm adductor
medially rotates arm & shoulder

21

Deltoid action?

Prime mover of arm abduction when it's fibers contract simultaneously
agonist of arm abduction
antagonist of pectoralis major & latissimus dorsi

22

Supraspinatus action?

initiates abduction
stabilizes shoulder joint

23

Infraspinatus action?

stabilizes shoulder joint

24

Subscapularis action?

Chief medial rotator of humerus

25

Teres minor action?

stabilizes shoulder joint

26

Teres major action?

extends, medially rotates, and adducts humerus
synergist of latissimus dorsi

27

Coracobrachialis action?

flexes and adducts humerus
synergist of pectoralis major

28

Pectoralis major innervation?

Lateral & medial pectoral nerves C5-C8 and T1

29

Latissimus dorsi innervation?

Thoracodorsal C6- C8

30

Deltoid innervation?

Axillary nerve C5- C6