Shoulder Muscles

Question 0

Deltoid insertion

Answer 0

Deltoid tuberosity of humeru

Question 1

Deltoid origin

Answer 1

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

Question 2

Deltoid innervation

Answer 2

Axillary nerve

Question 3

Deltoid action

Answer 3

Abducts arm
Anterior fibers flex arm
Posterior fibers extend arm

Question 4

Supraspinatus origin

Answer 4

Supraspinous fossa

Question 5

Supraspinatous insertion

Answer 5

Greater tubercle of humerus (superior)

Question 6

Supraspinatous innervation

Answer 6

Suprascapular nerve

Question 7

Supraspinatous action

Answer 7

Abducts arm

Question 8

Infraspinatus origin

Answer 8

Infraspinous fossa

Question 9

Infraspinatous insertion

Answer 9

Greater tubercle of humerus (middle)

Question 10

Infraspinatus innervation

Answer 10

Suprascapular nerve

Question 11

Infraspinatus action

Answer 11

Laterally rotates arm

Question 12

Teres minor origin

Answer 12

Lateral border of scapula (upper half)

Question 13

Teres minor insertion

Answer 13

Greater tubercle of humerus (inferior)

Question 14

Teres minor innervation

Answer 14

Axillary nerve

Question 15

Teres minor action

Answer 15

Lateral rotation of arm

Question 16

Teres major origin

Answer 16

Lateral border of scapula (inferior half and inferior angle)

Question 17

Teres major insertion

Answer 17

Anterior side of humerus (medial lip of intertubercular groove)

Question 18

Teres major action

Answer 18

Extends and medially rotates arm

Question 19

Subscapularis origin

Answer 19

Subscapular fossa

Question 20

Subscapularis insertion

Answer 20

Lesser tubercle of humerus

Question 21

Subscapularis innervation

Answer 21

Upper and lower subscapular nerves

Question 22

Subscapularis action

Answer 22

Adducts and medially rotates arm

Question 23

Pectoralis major origin

Answer 23

Clavicular head: medial 1/3 of clavicle

Sternocostal head: sternum and adjacent costal cartilage

Question 24

Pectoralis major insertion

Answer 24

Anterior side of humerus (lateral lip of intertubercular groove)

Question 25

Pectoralis major innervation

Answer 25

Medial and lateral pectoral nerves

Question 26

Pectoralis major action

Answer 26

Flexes, adducts, medially rotates arm

Question 27

Pectoralis minor origin

Answer 27

Ribs 3-5

Question 28

Pectoralis minor insertion

Answer 28

Coracoid process of scapula

Question 29

Pectoralis minor innervation

Answer 29

Medial pectoral nerve

Question 30

Pectoralis minor action

Answer 30

Depresses scapula | Assists with protraction

Question 31

Serratus anterior origin

Answer 31

Upper ribs (1-8)

Question 32

Serratus anterior insertion

Answer 32

Medial border of the scapula (anterior side)

Question 33

Serratus anterior innervation

Answer 33

Long thoracic nerve

Question 34

Serratus anterior action

Answer 34

Protracts and laterally rotates scapula

Question 35

Teres major innervation

Answer 35

Lower subscapular nerve