Shoulder & Pectoral Region

Question 1

Infraspinatus - blood supply

Answer 1

suprascapular artery

Question 2

Infraspinatus - action

Answer 2

lateral rotation of arm

Question 3

Infraspinatus - origin

Answer 3

medial 2/3 of infraspinous process of scapula

Question 4

Infraspinatus - insertion

Answer 4

greater tubercle of humerus

medial facet on posterior side

Question 5

infraspinatus - innervation

Answer 5

suprascapular n.

Question 6

supraspinatus - blood supply

Answer 6

suprascapular artery

Question 7

supraspinatus - action

Answer 7

ABduction of arm (0-15*)

Question 8

supraspinatus - origin

Answer 8

greater tubercle of humerus

superior facet

Question 9

supraspinatus - innervation

Answer 9

suprascapular n.

Question 10

subscapularis - blood

Answer 10

subscapular a. & lateral thoracic a.

Question 11

subscapularis - action

Answer 11

medial rotation of arm

Question 12

subscapularis - origin

Answer 12

medial 2/3 of scapular fossa

Question 13

subscapularis - insertion

Answer 13

lesser tubercle of humerus

Question 14

subscapularis - innervation

Answer 14

lower & upper subscapular n.

Question 15

teres major - blood

Answer 15

circumflex scapular a.

Question 16

teres major - action

Answer 16

ADduction of arm

Question 17

teres major - origin

Answer 17

inferior angle of scapula (posterior surface)

Question 18

teres major - insertion

Answer 18

intertubercular sulcus of humerus (medial lip)

Question 19

teres major - innervation

Answer 19

lower subscapular n.

Question 20

deltoid - blood

Answer 20

• posterior circumflex humoral artery

- deltoid branch of thoracic-acromial artery

Question 21

deltoid - action

Answer 21

C - medial rotation of arm
A - ABduction of arm (>15*)
S - lateral rotation of arm

Question 22

deltoid - origin

Answer 22

• anterior border of lateral 1/3 of clavicle
• lateral margin of acromion
• crest of spine of scapula

Question 23

deltoid - insertion

Answer 23

deltoid tuberosity of humerus

Question 24

deltoid innervation

Answer 24

axillary n.

Question 25

teres minor - blood

Answer 25

circumflex scapular a.

Question 26

teres minor - action

Answer 26

lateral rotation of arm

Question 27

teres minor - origin

Answer 27

posterior surface of scapula (adjacent to lateral border)

Question 28

teres minor - insertion

Answer 28

greater tubercle of humerus (inferior facet on posterior surface)

Question 29

teres minior - innervation

Answer 29

axillary n.

Question 30

pectoralis major - blood

Answer 30

- pectoral branch of thoracoacromial a. | - perforating branches of internal thoracic a.

Question 31

pectoralis major - action

Answer 31

- ADducts & medially rotates shoulder joint | - stablilizes scapula (interiorly & anteriorly)

Question 32

pectoralis major - origin

Answer 32

- medial 1/2 clavicle (anterior) | - anterior surface of sternum, superior 6 costal cartilages

Question 33

pectoralis major - insertion

Answer 33

intertubercular sulcus (lateral lip)

Question 34

pectoralis major - innervation

Answer 34

lateral & medial pectoral nerves

Question 35

pectoralis minor - blood

Answer 35

- pectoral branch of thoracoacromial a. | - intercostal lateral thoracic arteries

Question 36

pectoralis minor - action

Answer 36

stabilizes scapula (inferiorly & anteriorly)

Question 37

pectoralis minor - origin

Answer 37

ribs 3-5 (near costal cartilages)

Question 38

pectoralis minor - insertion

Answer 38

corocoid process of scapula (medial border & superior surface)

Question 39

pectoralis minor - innervation

Answer 39

medial pectoral nerve

Question 40

serratus anterior - blood

Answer 40

long thoracic a.

Question 41

serratus anterior - action

Answer 41

- Protracts Scapula - Holds Scapula against Thoracic Wall - Rotates Scapula

Question 42

serratus anterior - origin

Answer 42

ribs 1-8 (external surfaces of lateral parts)

Question 43

serratus anterior - insertion

Answer 43

medial border of scapula (anterior surface

Question 44

serratus anterior - innervation

Answer 44

long thoracic nerve

Question 45

subclavius - blood

Answer 45

clavicular branch of thoracoacromial a

Question 46

subclavius - action

Answer 46

anchors & depresses clavicle

Question 47

subclavius - origin

Answer 47

junction of rib 1 and its costal cartilage

Question 48

subclavius - insertion

Answer 48

middle 1/3 of clavicle (inferior surface)

Question 49

subclavius - innervation

Answer 49

subclavian n.

Question 50

muscles of rotator cuff

Answer 50

Super Into Tiny Subs supraspinatus infraspinatus teres minor subscapularis