Pectoral Region and Axilla (Exam 1)

Question 1

What is the fascia of the pectoral region continuous with

Answer 1

fascia of the neck and brachium

Question 2

What sheath will transverse the pectoral region and axilla

Answer 2

axillary sheath

Question 3

What does the axillary sheath contain

Answer 3

important neurovascular structures

Question 4

What lymph nodes drain the breast

Answer 4

Anterior/ pectoral

Question 5

What is the flow of lymph node drainage

Answer 5

1. Anterior/pectoral
2. Posterior/ subscapular
3. Lateral
4. Central
5. Apical: terminal

Question 6

What is unique about the structure of pectoralis major

Answer 6

3 different bands in the muscle

Question 7

What do the 3 different bands of pectoralis major allow for

Answer 7

3 different functions

Question 8

What is the major function of pectoralis major

Answer 8

Adduction of the humerus
Medial rotation
Flexion of humerus

Question 9

What is the innervation of the pectoralis major

Answer 9

lateral and medial pectoral nerve

Question 10

What are the actions of pectoralis minor

Answer 10

protraction of scapula

elevation of ribs

Question 11

Why might a person with COPD or CHF place a hand on the table when trying to catch a breath

Answer 11

stabilizes scapula so that pectoralis minor can assist with lifting the rib cage

Question 12

What are the attachements for pectoralis minor

Answer 12

ribs 3-5

coracoid process of scapula

Question 13

What is the innervation of pectoralis minor

Answer 13

medial pectoral nerve

Question 14

How will fascia around pec major and minor will affect the spread of infection

Answer 14

Deep to pectoral major is limited, as there is bone and fascia to stope the spread

underneath, pec minor infection can spread to the neck

Question 15

What are the boundaries of the axilla

Answer 15

Rib cage
Axial skin folds
humerus
scapula
clavicle

Question 16

What are the contents of the axilla

Answer 16

axillary artery
axillary vein/basilic vein
brachial plexus
lymphatics

Question 17

What does the axillary sheath cover

Answer 17

brachial plexus
axillary artery
axillary and basilic veins

Question 18

When does the subclavian vein become the axillary artery

Answer 18

as the vessel crosses rib 1

Question 19

When does the axillary artery become the brachial artery

Answer 19

after it passes teres major

Question 20

Where does the lateral thoracic artery go

Answer 20

to the top of the serratus anterior

Question 21

What does the lateral thoracic artery run with

Answer 21

long thoracic nerve

Question 22

Where does the circumlex scapular artery go

Answer 22

through the triangular space

Question 23

Where does the anterior and posterior circumflex go

Answer 23

wraps around the humeurs

Question 24

Which is larger, the anterior or posterior circumflex humeral artery

Answer 24

posterior

Question 25

What are the three parts of the axillary artery

Answer 25

section 1 section 2 section 3

Question 26

How many branches come off section 1

Answer 26

1 branch

Question 27

What is the name of the branch off of section 1 of the axillary artery

Answer 27

superior thoracic artery

Question 28

How many branches come off of section 2 of the axillary artery

Answer 28

2 branches

Question 29

What are the two branches off the 2nd section of the axillary artery

Answer 29

thoracroacomial artery | lateral thoracic artery

Question 30

How many branches come off of the 3rd section of the axillary arter

Answer 30

3

Question 31

What are the three branches of the 3rd section of the axillary artery

Answer 31

subscapular anterior circumflex artery posterior circumflex artery

Question 32

The subscapular branch of the 3rd section of the axillary artery has how many branches

Answer 32

2

Question 33

What are the two branches of the subscapular branch off the 3rd section of the axillary artery

Answer 33

circumflex scapular | thoracodorsal artery

Question 34

Where on the body is the first part of the axillary artery located

Answer 34

from the clavicle to the start of pec minor

Question 35

Where on the body is the second part of the axillary artery located

Answer 35

underneath the pectoralis minor

Question 36

Where on the body is the third part of the axillary artery located

Answer 36

after pectoralis minor

Question 37

How are cords of the brachial plexus named

Answer 37

according to their relationship to the axillary artery

Question 38

What is the order in which brachial plexus is made

Answer 38

anterior rami of spinal cords form the roots roots form the trunks trunks form the divisions divisions become the branches

Question 39

Where do radial and axillary nerves originate from

Answer 39

posterior cord of brachial plexus

Question 40

What will upper and lower subscapular nerves innervate

Answer 40

Upper: subscapularis Lower: teres major

Question 41

Where will radiculopathies of the brachial plexus occur

Answer 41

before the roots of the brachial plexus

Question 42

What causes Erb's palsy

Answer 42

injury to C5-C6 root

Question 43

What causes Klumpke palsy

Answer 43

C8-T1

Question 44

What causes carpal tunnel

Answer 44

compression of the median nerve

Question 45

What structure should you look for to identify the cords of the brachial plexus

Answer 45

The M near axial artery

Question 46

What is contained within the roots of the brachial plexus

Answer 46

single spinal cord level

Question 47

What will trunks of the brachial plexus give rise

Answer 47

anterior and posterior divisions

Question 48

Where will all posterior divisions of the brachial plexus converge

Answer 48

posterior cord

Question 49

What is contained within major branches of the brachial plexus

Answer 49

more than one spinal cord level

Question 50

How are spinal cord levels distributed thorughout the body

Answer 50

branches off the brachial plexus

Question 51

What is a dermatome

Answer 51

skin innervated by spinal level

Question 52

What is a myotome

Answer 52

proximal to distal and compartments