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LECOM MS1 Gross Anatomy > Pectoral Region and Axilla (Exam 1) > Flashcards

Pectoral Region and Axilla (Exam 1) Flashcards

1
Q

What is the fascia of the pectoral region continuous with

A

fascia of the neck and brachium

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2
Q

What sheath will transverse the pectoral region and axilla

A

axillary sheath

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3
Q

What does the axillary sheath contain

A

important neurovascular structures

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4
Q

What lymph nodes drain the breast

A

Anterior/ pectoral

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5
Q

What is the flow of lymph node drainage

A
  1. Anterior/pectoral
  2. Posterior/ subscapular
  3. Lateral
  4. Central
  5. Apical: terminal
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6
Q

What is unique about the structure of pectoralis major

A

3 different bands in the muscle

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7
Q

What do the 3 different bands of pectoralis major allow for

A

3 different functions

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8
Q

What is the major function of pectoralis major

A

Adduction of the humerus
Medial rotation
Flexion of humerus

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9
Q

What is the innervation of the pectoralis major

A

lateral and medial pectoral nerve

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10
Q

What are the actions of pectoralis minor

A

protraction of scapula

elevation of ribs

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11
Q

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

A

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

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12
Q

What are the attachements for pectoralis minor

A

ribs 3-5

coracoid process of scapula

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13
Q

What is the innervation of pectoralis minor

A

medial pectoral nerve

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14
Q

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

A

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

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15
Q

What are the boundaries of the axilla

A 
Rib cage
Axial skin folds
humerus
scapula
clavicle
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16
Q

What are the contents of the axilla

A

axillary artery
axillary vein/basilic vein
brachial plexus
lymphatics

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17
Q

What does the axillary sheath cover

A

brachial plexus
axillary artery
axillary and basilic veins

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18
Q

When does the subclavian vein become the axillary artery

A

as the vessel crosses rib 1

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19
Q

When does the axillary artery become the brachial artery

A

after it passes teres major

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20
Q

Where does the lateral thoracic artery go

A

to the top of the serratus anterior

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21
Q

What does the lateral thoracic artery run with

A

long thoracic nerve

22
Q

Where does the circumlex scapular artery go

A

through the triangular space

23
Q

Where does the anterior and posterior circumflex go

A

wraps around the humeurs

24
Q

Which is larger, the anterior or posterior circumflex humeral artery

A

posterior

25
Q

What are the three parts of the axillary artery

A

section 1
section 2
section 3

26
Q

How many branches come off section 1

A

1 branch

27
Q

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

A

superior thoracic artery

28
Q

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

A

2 branches

29
Q

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

A

thoracroacomial artery

lateral thoracic artery

30
Q

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

A

3

31
Q

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

A

subscapular
anterior circumflex artery
posterior circumflex artery

32
Q

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

A

2

33
Q

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

A

circumflex scapular

thoracodorsal artery

34
Q

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

A

from the clavicle to the start of pec minor

35
Q

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

A

underneath the pectoralis minor

36
Q

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

A

after pectoralis minor

37
Q

How are cords of the brachial plexus named

A

according to their relationship to the axillary artery

38
Q

What is the order in which brachial plexus is made

A

anterior rami of spinal cords form the roots

roots form the trunks

trunks form the divisions

divisions become the branches

39
Q

Where do radial and axillary nerves originate from

A

posterior cord of brachial plexus

40
Q

What will upper and lower subscapular nerves innervate

A

Upper: subscapularis
Lower: teres major

41
Q

Where will radiculopathies of the brachial plexus occur

A

before the roots of the brachial plexus

42
Q

What causes Erb’s palsy

A

injury to C5-C6 root

43
Q

What causes Klumpke palsy

A

C8-T1

44
Q

What causes carpal tunnel

A

compression of the median nerve

45
Q

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

A

The M near axial artery

46
Q

What is contained within the roots of the brachial plexus

A

single spinal cord level

47
Q

What will trunks of the brachial plexus give rise

A

anterior and posterior divisions

48
Q

Where will all posterior divisions of the brachial plexus converge

A

posterior cord

49
Q

What is contained within major branches of the brachial plexus

A

more than one spinal cord level

50
Q

How are spinal cord levels distributed thorughout the body

A

branches off the brachial plexus

51
Q

What is a dermatome

A

skin innervated by spinal level

52
Q

What is a myotome

A

proximal to distal and compartments

LECOM MS1 Gross Anatomy (12 decks)

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