Anatomy Breast and Pectoral Region

Question 1

Mammary Gland

Answer 1

Modified Sweat Gland

Question 2

Pectoral Fascia Attachment

Answer 2

Attached to overlying skin by the suspensory ligaments of the breast that pass between the lobes of the mammary gland

Question 3

Areola

Answer 3

Tissue surrounding the nipple

Question 4

Lactiferous Ducts

Answer 4

converge on the nipple

Question 5

Lactiferous Sinus

Answer 5

deep to the nipple (expanded part of the lactiferous duct)

Question 6

Retromammary Space

Answer 6

anterior to pectoralis major muscle

Question 7

platysma muscle

Answer 7

muscle of facial expression that may extend inferior to the clavicle into the superficial fascia of the superior thorax (very thing, but broad)

Question 8

What are the 3 muscles in the pectoral region?

Answer 8

Pectoralis Major and Minor, and Subclavius

Question 9

Two heads of the pectoralis major muscle

Answer 9

clavicular head and sternocostal head

Question 10

What is the juncture of the clavicular head and sternocostal head of the pectoralis major?

Answer 10

sternoclavicular joint

Question 11

Pectoralis Major Lateral Attachment

Answer 11

Humerus

Question 12

Pectoralis Major Action

Answer 12

flexes, adducts, and medially rotates the humerus

Question 13

Deltopectoral Triangle

Answer 13

Superior Border of the clavicular head of the pectoralis major
Inferior Border of the deltoid muscle near the clavicle
Laterally deltopectoral triangle narrows to form the deltopectoral groove

Question 14

Pectoralis Major Medial Attachment

Answer 14

Sternum

Question 15

Medial and Lateral Pectoral Nerves And Vessels

Answer 15

deep to the clavicular head of the pectoralis major muscle

Question 16

lateral pectoral nerve and pectoral branch of the thoracoacromial artery

Answer 16

enter the deep surface of the clavicular head

Question 17

clavipectoral fascia, pectoralis minor muscle, and subclavius muscle

Answer 17

all deep to the pectoralis major

Question 18

Pectoralis Minor Muscle Inferior Attachment

Answer 18

Ribs 3 & 5 near their costal cartilages

Question 19

Pectoralis Minor Muscle Superior Attachment

Answer 19

Coracoid Process of the Scapula

Question 20

Pectoralis Minor Muscle Action

Answer 20

draws the glenoid cavity of the scapula anteriorly and inferiorly

Question 21

Medial Pectoral Nerve

Answer 21

pierces the pectoralis minor muscle and then enters the deep surface of the pectoralis major muscle, innervating both

Question 22

subclavius muscle

Answer 22

inferior to the clavicle

Question 23

subclavius attachments

Answer 23

clavicle and the first rib

Question 24

subclavius action

Answer 24

depresses the clavicle

Question 25

clavipectoral fascia

Answer 25

immediately deep to the pectoralis major muscle
superiorly, attached to the clavicle
lies superficial and deep to the subclavius muscle and pectoralis minor muscle
inferiorly, attached to axillary fascia

Question 26

Costacoracoid Membrane, what artery, nerve, and vein passes through?

Answer 26

Cephalic Vein
Thoracoacromial Artery
Lateral Pectoral Nerve

Question 27

Branches of the thoracoacromial artery

Answer 27

Pectoral Branch
Deltoid Branch
Acromial Branch
Clavicular Branch

Question 28

Pectoral Branch of the Thoracoacromial Artery

Answer 28

descends between the pectoralis major and minor and supplies both (usually the largest branch)

Question 29

Deltoid Branch of the Thoracoacromail Artery

Answer 29

courses laterally in the deltopectoral groove between the deltoid and Pectoralis Major (deltoid branch accompanies the cephalic vein)

Question 30

Acromial Branch of the Thoracoacromial Artery

Answer 30

passes superior to coracoid process and courses toward the acromion (it may arise from the deltoid branch several centimeters from the thoracoacromial artery

Question 31

Clavicular Branch of the Thoracoacromial Artery

Answer 31

courses superiorly and medially to supply the subclavius muscle and sternoclavicular joint

Question 32

lateral thoracic artery

Answer 32

lateral border of the pectoralis minor

Question 33

Serratus Anterior

Answer 33

Covers the lateral surface of the thoracic wall

Question 34

Serratus Anterior Attachments (anterior)

Answer 34

upper 8th and 9th ribs

Question 35

Serratus Anterior Attachment (posterior)

Answer 35

anterior surface of the scapula along the entire length of its medial border

Question 36

Breast Location

Answer 36

Extends from the lateral border of the sternum to the midaxillary line and from Rib 2-Rib 6