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Anatomy Muscle Tables > Shoulder > Flashcards

Flashcards in Shoulder Deck (36):
0

Deltoid origin

Spine of the scapula, acromion, lateral 1/3 of clavicle

1

Deltoid insertion

Deltoid tuberosity of humerus

2

Deltoid innervation

Axillary nerve

3

Deltoid action

Abducts arm; anterior fibers can flex arm, posterior fibers can extend arm

4

Supraspinatus origin

Supraspinous fossa

5

Supraspinatus insertion

Greater tubercle of humerus (superior part)

6

Supraspinatus innervation

Suprascapular nerve

7

Supraspinatus action

Abducts arm
(also responsible for initiating abduction)

8

Infraspinatus origin

Infraspinous fossa

9

Infraspinatus insertion

Greater tubercle of humerus (middle part)

10

Infraspinatus innervation

Suprascapular nerve

11

Infraspinatus action

Laterally rotates arm

12

Teres minor origin

Lateral border of scapula
(upper half)

13

Teres minor insertion

Greater tubercle of humerus (inferior part)

14

Teres minor innervation

Axillary nerve

15

Teres minor action

Laterally rotates arm

16

Teres major origin

Lateral border of scapula
(lower half and inferior angle)

17

Teres major insertion

Anterior side of humerus (medial lip of intertubercular groove)

18

Teres major innervation

Lower subscapular nerve

19

Teres major action

Extends and medially rotates arm

20

Subscapularis origin

Subscapular fossa

21

Subscapularis insertion

Lesser tubercle of humerus

22

Subscapularis innervation

Upper and Lower subscapular nerves

23

Subscapularis action

Adducts and medially rotates arm

24

Pectoralis major origin

Clavicular head: medial ½ of clavicle
Sternocostal head: sternum and adjacent costal cartilages

25

Pectoralis major insertion

Anterior side of humerus (lateral lip of intertubercular groove)

26

Pectoralis major innervation

Medial and Lateral pectoral nerves

27

Pectoralis major action

Flexes, adducts and medially rotates arm

28

Pectoralis minor origin

Ribs 3-5

29

Pectoralis minor insertion

Coracoid process of scapula

30

Pectoralis minor innervation

Medial pectoral nerve

31

Pectoralis minor action

Depresses scapula and assists with protraction

32

Serratus anterior origin

Upper ribs (typically 1-8)

33

Serratus anterior insertion

Medial border of the scapula (anterior side)

34

Serratus anterior innervation

Long thoracic nerve

35

Serratus anterior action

Protracts and laterally rotates scapula