Scapular and Pectoral Muscles

Question 1

Deltoid origin

Answer 1

Lateral one third of the clavicle, acromion, and spine of scapula

Question 2

Deltoid insertion

Answer 2

Deltoid tuberosity

Question 3

Deltoid actions

Answer 3

Abducts arm, anterior fibers flex and medially rotate arm, posterior fibers extend and laterally rotate arm

Question 4

Deltoid innervation

Answer 4

Axillary nerve

Question 5

Deltoid blood supply

Answer 5

Posterior circumflex humeral artery

Question 6

Supraspinatus origin

Answer 6

Surpaspinous fossa

Question 7

Supraspinatus insertion

Answer 7

Greater tubercle of the humerus

Question 8

Supraspinatus actions

Answer 8

Abducts arm

Question 9

Supraspinatous innervation

Answer 9

Suprascapular nerve

Question 10

Supraspinatous blood supply

Answer 10

Suprascapular artery

Question 11

Infraspinatous origin

Answer 11

Infraspinous fossa

Question 12

Infraspinatous insertion

Answer 12

Greater tubercle of the humerus

Question 13

Infraspinatous actions

Answer 13

Laterally rotates arm

Question 14

Infraspinatous innervation

Answer 14

Suprascapular nerve

Question 15

Infraspinatous blood supply

Answer 15

Suprascapular artery

Question 16

Teres minor origin

Answer 16

Axillary border of the scapula

Question 17

Teres minor insertion

Answer 17

Greater tubercle of the humerus

Question 18

Teres minor actions

Answer 18

Laterally rotates arm

Question 19

Teres minor innervation

Answer 19

Axillary nerve

Question 20

Teres minor blood supply

Answer 20

Circumflex scapular artery

Question 21

Teres major origin

Answer 21

Axillary border of the scapula

Question 22

Teres major insertion

Answer 22

Lesser tubercle of the humerus

Question 23

Teres major actions

Answer 23

Extends, adducts, and medially rotates arm

Question 24

Teres major innervation

Answer 24

Lower subscapular nerve

Question 25

Teres major blood supply

Answer 25

Circumflex scapular artery and thoracodorsal artery

Question 26

Subscapularis origin

Answer 26

Subscapular fossa

Question 27

Subscapularis insertion

Answer 27

Lesser tubercle of the humerus

Question 28

Subscapularis actions

Answer 28

Medially rotates the arm

Question 29

Subscapularis innervation

Answer 29

Upper and lower subscapular nerve

Question 30

Subscapularis blood supply

Answer 30

Subscapular artery

Question 31

Pectoralis major origin

Answer 31

Sternum, costal cartilages 2-6, clavicle

Question 32

Pectoralis major insertion

Answer 32

Lateral lip of intertubercular groove

Question 33

Pectoralis major actions

Answer 33

Adducts, medially rotates, flexes arm; extends flexed arm; depresses and protracts pectoral girdle

Question 34

Pectoralis major innervation

Answer 34

Medial and lateral pectoral nerve

Question 35

Pectoralis major blood supply

Answer 35

Thoracoacromial and lateral thoracic artery

Question 36

Pectoralis minor origin

Answer 36

Ribs 2-5

Question 37

Pectoralis minor insertion

Answer 37

Coracoid process of scapula

Question 38

Pectoralis minor actions

Answer 38

Depressed and protracts pectoral girdle

Question 39

Pectoralis minor innervation

Answer 39

Medial pectoral nerve

Question 40

Pectoralis minor blood supply

Answer 40

Thoracoacromial and lateral thoracic artery

Question 41

Subclavius origin

Answer 41

1st costal cartilage

Question 42

Subclavius insertion

Answer 42

Inferior surface of clavicle

Question 43

Subclavius actions

Answer 43

Depresses clavicle; resists lateral dislocation

Question 44

Subclavius innervation

Answer 44

Nerve to subclavius

Question 45

Subclavius blood supply

Answer 45

Thoracoacromial artery

Question 46

Serratus anterior origin

Answer 46

Ribs 1-9

Question 47

Serratus anterior insertion

Answer 47

Ventral surface of medial border of scapula

Question 48

Serratus anterior actions

Answer 48

Protracts and superiorly rotates scapula

Question 49

Serratus anterior innervation

Answer 49

Long thoracic nerve

Question 50

Serratus anterior blood supply

Answer 50

Lateral thoracic and sub scapular artery