The pectoral region Session 1

Question 1

midline

Answer 1

centre of sternum

Question 2

midclavicular line

Answer 2

middle of clavicle

Question 3

mid axillary line

Answer 3

middle of axilla down

Question 4

anterior axillary line

Answer 4

front of armpit down

Question 5

posterior axillary line

Answer 5

back of armpit down

Question 6

where and what is the mammary gland

Answer 6

in subcutaneous layer of fat of chest wall

for lactation of breast

Question 7

layers of chest wall (out to in)

Answer 7

skin
subcutaneous fat
subcutaneous fascia
pectoralis major
fascia
pectoralis minor
ribs

Question 8

where do nerves and blood vessels supplying the skin emerge from and what is their path

Answer 8

spaces between costal cartilages and intercostal spaces

pass through the intercostal membranes and muscles

Question 9

what r the origins of pectoralis major

Answer 9

medial half clavicle
costal cartilages C1-C6
sternum

Question 10

what is the shape of pectoralis major

Answer 10

fan shaped

Question 11

what is the attachment of pectoral major and how

Answer 11

upper and lower fibres (from each head) converge and insert onto greater tubercle of humerus

Question 12

what r the two heads of pec major

Answer 12

clavicular and the sternocostal

Question 13

what muscleis lateral to attachment of pectoralis major

Answer 13

deltoid muscle

Question 14

what runs in the groove between deltoid and pec major

Answer 14

cephalic vein

Question 15

what forms the anterior fold of axilla

Answer 15

lowest and most lateral part of pectoralis major

Question 16

what r the origins of pec minor

Answer 16

margins fo 3rd, 4th and 5th ribs

Question 17

what is the insertion of pectoralis minor

Answer 17

coracoid process

Question 18

what is underneath pectoralis minor

Answer 18

axilla

Question 19

relationship between individual pectoralis muscles and axilla

Answer 19

pectoralis major forms front wall of axilla

pectoralis minor reinforces the middle of axilla

Question 20

what nerves enter the back of pectoralis major

Answer 20

medial and lateral pectoral nerves

Question 21

what is the path of the medial pectoral nerve

Answer 21

enters deep surface of pec major medial to pectoralis minor

pierces pec minor

Question 22

what does medial pectoral nerve innervate

Answer 22

pec minor and major

Question 23

path of lateral pectoral nerve

Answer 23

leaves axilla to supply pec major

enters back of pec major

Question 24

what is origin of serratus anterior

Answer 24

origin from upper 8 ribs laterally

Question 25

insertion of serratus anterior

Answer 25

anterior surface of medial border of scapula

Question 26

position of serratus anterior in relation to ribs and scapula

Answer 26

passes backwards over ribs and deep to scapula

Question 27

what is the origin of external oblique

Answer 27

ribs 5-12

Question 28

what does lymph drainage of breast drain into

Answer 28

lymph nodes in the axilla

Question 29

what is lymph drainage medial to to the breast

Answer 29

lymph passes through intercostal spaces to lymph nodes in the thorax

Question 30

what r the thorax lymph nodes called

Answer 30

internal mammary lymph nodes

Question 31

action of pec major (2)

Answer 31

arm adduction | internal rotation of arm

Question 32

action of pec minor (1)

Answer 32

stabilises scapula onto the thoracic ribs