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1

proximal attachment of pectoralis major

clavicular head (anterior surface of medial half of clavicle)
sternocostal head (anterolateral surface of sternum and 1st 6 costal cartilage

2

distal attachment of pectoralis major

lateral lip of intertubercular sulcus of humerus

3

actions of pectoralis major

adducts and medially rotates humerus
clavicular head flexes humerus at shoulder joint

4

innervation of pectoralis major

lateral and medial pectoral nerve

5

proximal attachment of pectoralis minor

3rd-5th ribs near their costal cartilages

6

distal attachment of pectoralis minor

medial border and superior surface of coracoid process of scapula

7

actions of pectoralis minor

stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

8

innervation of pectoralis minor

medial pectoral nerve

9

proximal attachment of subclavius

junction of the first rib with its costal cartilage

10

distal attachment of subclavius

inferior surface of middle third of clavicle

11

actions of subclavius

anchors and depresses clavicle

12

innervation of subclavius

nerve to subclavius

13

proximal attachment of serratus anterior

anterolateral surface of 1st-8th ribs

14

distal attachment of serratus anterior

anterior surface of medial border of scapula

15

actions of serratus anterior

protracts scapula and holds it against posterior thoracic wall
lower fibers rotate scapula laterally

16

innervation of serratus anterior

long thoracic nerve

17

winged scapula

damage to serratus anterior or long thoracic nerve
may also affect rhomboids or trapezius

18

long thoracic nerv

only nerve to lie superficial to muscle

19

proximal attachments of deltoid

anterior fibers--lateral third of clavicle
lateral fibers--acromion process
posterior fibers--spine of scapula

20

distal attachment of deltoid

deltoid tuberosity on lateral aspect of shaft of humerus

21

actions of deltoid

anterior fibers--flex and medially rotate humerus
middle fibers--abduct humerus
posterior fibers--extend and laterally rotate humerus

22

innervation of deltoid

axillary nerve

23

deltopectoral triangle

region between pectoralis and deltoid
contains deltoid branch of thoracoacromial artery and cephalic vein

24

breast

unencapsulated gland in superficial fascia
circular base overlying ribs 2-6 extending from sternum to midaxillary line

25

what separates breast from pectoralis major

retromammary space
permits mobility

26

what happens to breast at puberty

lactiferous ducts develop 15-20 lobules of glandular tissue

27

ducts of the breast

extend from the nipple
expanded portion called lactiferous sinus collects milk during lactation

28

how is breast tissue attached to overlying skin

suspensory ligaments

29

polythelia

additional nipples lying on line from axilla to groin (embryonic mammary ridge)

30

axilla

apex
base
anterior wall
posterior wall
medial wall
lateral wall