Pectoral Region, Anterior Shoulder, Axilla, Breast

Question 1

what is the muscle on the anterior thoracoappendicular region

Answer 1

pectoralis major

Question 2

what artery separates deltoid from the pectoralis major

Answer 2

basilar artery

Question 3

what nerves innervate the pectoralis major

Answer 3

medial and lateral pectoral nerves

Question 4

what muscle has an origin at:
Clavicular head – anterior surface of medial half of clavicle
Sternocostal head – anterior surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique

Answer 4

pectoralis major

Question 5

what muscle has an insertion at:
Lateral lip of intertubercular (bicipital groove) of humerus (part of the PLT)

Answer 5

pectoralis major

Question 6

what muscle:
Adducts, Internally Rotate, draws scapula anteriorly and inferiorly

Clavicular head – flexes humerus

Sternocostal head – extends humerus

Answer 6

pectoralis major

Question 7

what is innervated by the medial pectoral nerve

Answer 7

pectoralis minor

Question 8

what muscle:
Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall (depresses and protracts scapula)

Answer 8

pectoralis minor

Question 9

what muscle:
origin near ribs 3-5 near their costal cartilages

Answer 9

pectoralis minor

Question 10

what muscle:
insertion near medial border and superior surface of coracoid process of scapula

Answer 10

pectoralis minor

Question 11

what muscle:
causes “Rounded Shoulder Posture”
and
Neurovascular Entrapment – Thoracic Outlet Syndrome

Answer 11

pectoralis minor

Question 12

what muscle:
origin near external surfaces of lateral parts of ribs 1-8

Answer 12

Serratus Anterior

Question 13

what muscle:
insertion at anterior surfaces of medial border of scapula

Answer 13

Serratus Anterior

Question 14

what muscle:
Protracts scapula and holds it against thoracic wall, upward rotation of scapula

Most important muscle that stabilizes scapula to thoracic wall

weak muscle could cause winging of the scapula**

Answer 14

Serratus Anterior

Question 15

what muscle:
innervated by the Long thoracic nerve

Answer 15

serratus anterior

Question 16

what muscle:
Anterior- Flexes and internally rotates arm at Shoulder
Middle- Abducts arm at Shoulder
Posterior- Extends and externally rotates arm at Shoulder

Answer 16

deltoid

Question 17

what muscle:
insertion near deltoid tuberosity of humerus

Answer 17

deltoid

Question 18

what muscle:
origin at Lateral third of clavicle, acromion, spine of scapula

Answer 18

deltoid

Question 19

what muscle:
innervated by axillary nerve (c5, c6)

Answer 19

deltoid

Question 20

Pyramidal shaped space through which important neurovascular structures pass between the upper limb, neck, and chest cavity

Answer 20

axilla

Question 21

the axilla sheath contains these 3 things

Answer 21

axillary artery
axillary vein
Brachial plexus (infraclavicular portion)

Question 22

what artery begins at inferior border of teres major and ends in cubital fossa (opposite the neck of radius)

Answer 22

brachial artery

Question 23

what are the blood vessels of the aortic arch

Answer 23

aorta, brachiocephalic trunk, right CCA, left CCA, left subclavian

Remember your “ABCS”

Question 24

what is the order of the UE artery?

Answer 24

SUBCLAVIAN then AXILLARY then BRACHIAL

Question 25

do men have mammary glands

Answer 25

yes, but cannot lactate due to hormonal differences

Question 26

what stimulates breast development in females

Answer 26

estrogen

Question 27

what are mammary glands composed of

Answer 27

15-20 irregularly shaped lobes

alveolar glands, then alveolar ducts, then lactiferous duct, then nipple

Question 28

how many people for breast cancer in 2014

Answer 28

233,000 new cases
40,000 death

Question 29

what 3 muscles attach at the coracoid process**

Answer 29

pectoralis minor
coracobrachialis
short head of the biceps brachii