Nick Gross Anatomy: Pectoral Region And The Female Breast

Front 1

Contour of male pectoral region formed mainly by....

Back 1

Pectoralis major m.

Front 2

Nipple of male located....

Back 2

4th intercostal space (b/w 4th and 5th ribs) along mid-clavicular line

Front 3

Contour of female pectoral region formed mainly by....

Back 3

Breast

Front 4

Nipple location in female...

Back 4

Indefinite after puberty

Front 5

Superficial Fascia contains...

Back 5

Platysma and cutaneous nerves

Front 6

Platysma start/stop

Back 6

Extends from mandible to upper thorax, just inferior to clavicle

Front 7

Cutaneous nerves of pectoral region...

Back 7

Supraclavicular nn, Intercostal nn

Front 8

Origin and innervation of Supraclavicular nn...

Back 8

Origin: C3-C4 from cervical plexus

Innervate: Skin of 1st and 2nd intercostal spaces

Front 9

Origin of Intercostal nn

Back 9

T1-T7

Front 10

Location of female breast

Back 10

Vertically ribs 2-6
Horizontally from sternum to mid-axillary line

Front 11

Breast located in which layer of fascia

Back 11

Completely in superficial fascia

Front 12

How many openings in nipple for lactiferous ducts?

Back 12

15-20

Front 13

Each lactiferous duct drains milk from _____ mammary gland

Back 13

1

Front 14

Areola is located where?

Back 14

Pigmented skin that surrounds nipple

Front 15

The breast is composed of...

Back 15

mammary glands (15-20), suspensory ligaments of Cooper, septa separating lobules, fatty connective tissue

Front 16

Arteries of female breast

Back 16

Lateral Thoracic, intercostal, internal thoracic (perforating branches of intercostal spaces 3-6)

Front 17

Veins of female breast

Back 17

Internal thoracic, axillary

Front 18

Movement of lymph in breast

Back 18

Lymph vessels converge on the subareolar lymph plexus beneath skin of areola. Several lymph vessels then carry lymph to other nodes

Front 19

Distribution of lymph from subareolar lymph plexus

Back 19

75% to pectoral nodes --> Axillary nodes

25% to infraclavicular, parasternal, contralateral, and abdominal nodes

Front 20

Muscles of pectoral region

Back 20

Pectoralis major
pectoralis minor

Front 21

Heads of Pectoralis Major

Back 21

Clavicular head & Sternocostal head

Front 22

Origin and insertion of clavicular head of pectoralis major

Back 22

Origin: Medial 1/2 of clavicle
Insertion: Crest of greater tubercle
on humerus

Front 23

Origin and insertion of sternal head of pectoralis major

Back 23

Manubrium and body of sternum
Insertion: Crest of greater tubercle on humerus

Front 24

Origin and insertion of costal head of pectoralis major

Back 24

Origin: Costal cartilages 1-6
Insertion: Crest of greater tubercle on humerus

Front 25

Describe tendon and insertion of pectoralis major

Back 25

Bilaminar (two parts)
Anterior lamina from clavicular and upper sternocostal parts inserts inferiorly on crest of greater tubercle on humerus. Posterior lamina from fibers of lower origin twist with anterior lamina to attain a more superior position on the crest of the greater tubercle.

Front 26

Innervation of pectoralis major

Back 26

Lateral and Medial pectoral nn

Front 27

Origin of Lateral pectoral n and innervation

Back 27

C5-C7
Innervates most of upper portion

Front 28

Origin and path of Medial pectoral n.

Back 28

C8-T1
Innervates lower portion after passing through or around pectoralis minor m.

Front 29

Actions of pectoralis major

Back 29

Adduct and medially rotate humerus

Front 30

Location of Pectoralis Minor m

Back 30

Deep to pectoralis major m

Front 31

Origin of Pectoralis Minor

Back 31

Ribs 2-5 or 3-6

Front 32

Insertion of Pectoralis Minor

Back 32

Coracoid Process of scapula

Front 33

Innervation of Pectoralis Minor

Back 33

Medial Pectoral n

Front 34

Actions of pectoralis minor

Back 34

depressor and downward rotator of scapula