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1022 ANATOMY > Week 6 Axilla > Flashcards

Week 6 Axilla Flashcards

1
Q

apex (inlet) of the axilla

A

cervicoaxillary canal (bounded by 1st rib, posterior border of clavicle, superior edge of scapula)

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2
Q

base (floor) of the axilla

A

skin
subcutaneous tissue
axillary (deep) fascia

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3
Q

anterior wall (muscle) of the axilla

A

pectoralis major
pectoralis minor
pectoral fascia
clavipectoral fascia
anterior axillary fold
subclavian

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4
Q

posterior wall of the axilla

A

scapula
subscapulais
latissimus dorsi
teres major
posterior axillary fold

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5
Q

medial wall (bone and muscle) of the axilla

A

thoracic wall:
intercostal muscles
serratus anterior
1-4th ribs

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6
Q

lateral wall (bone and tendon) of the axilla

A

bicipital groove (intertubercular sulcus)
long head of biceps tendon

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7
Q

contents of the axilla

A

axillary sheath
axillary artery
axillary vein
brachial plexus
lymph nodes

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8
Q

cutaneous nerves of the axilla

A

supraclavicular (C3, 4)
upper lateral cutaneous nerve of the arm (C5, 6)
intercostobrachial (T2)

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9
Q

types of arteries of the axilla

A

subclavian
axillary

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10
Q

subclavian arteries in the axilla contains

A

suprascapular
dorsal scapular

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11
Q

axillary arteries begins and ends at

A

begins: lateral border of 1st rib
ends: inferior border of teres major

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12
Q

what structures are considered to be enclosed in the axillary sheath?

A

axillary artery
brachial plexus

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13
Q

3 end parts of axillary arteries of the axilla

A

1st part: superior thoracic

2nd part: lateral thoracic, thoracoacromial

3rd part: subscapular, anterior circumflex humeral, posterior circumflex humeral

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14
Q

axillary artery

A
  • is the direct continuation of the subclavian artery
  • is considered to have 3 parts, divided by pectoralis minor
  • gives off the lateral thoracic artery as a branch from its second part
  • gives off branches contributing to the anastomic arterial network around the scapula
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15
Q

veins of the axilla

A

axillary (deep)
basilic (superficial)
cephalic (superficial)

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16
Q

lymphatics of the axillary

A
  • drain the upper limb and most of the skin of the upper trunk
  • empty into 5 groups of the axillary nodes
17
Q

site of the base of the breast

A
  • lateral border of sternum to mid-axillary line (transversely)
  • 2-6th ribs (vertically)
18
Q

embryology of the breast

A

modified sweat glands
contains mammary glands
in superficial fascia

19
Q

The lymphatic drainage of the breast is primarily via lymph nodes located

A

in the axilla

20
Q

nerve supply of breast

A

intercostal nerves

21
Q

arterial supply and venous drainage of breast

A

internal thoracic (subclavian) vessels
lateral thoracic (axillary) vessels

22
Q

lymphatic drainage of breast

A
  • axillary (75%)
    pectoral (anterior) nodes
    subscapular (posterior) nodes
    humeral (lateral) nodes
    central nodes
    apical nodes
  • others (25%)
    infraclavicular
    supraclavicular
    parasternal
23
Q

5 parts of brachial plexus

A

roots, trunks, divisions, cords, branches

24
Q

roots - branches arising:

A

dorsal scapular nerve (C5)
long thoracic nerve (C5, 6, 7)

25
Q

trunks:

A

superior, middle, inferior

26
Q

superior trunks - branches arising:

A

suprascapular nerve (C5, 6)
nerve to subclavius (C5, 6)

27
Q

divisions:

A

3 anterior, 3 posterior

28
Q

cords:

A

lateral, posterior, medial

29
Q

lateral cords:

A

lateral pectoral (C5, 6, 7)

30
Q

posterior cords:

A

upper subscapular (C5, 6)
thoracodorsal (C6, 7, 8)
lower subscapular (C5, 6)

31
Q

medial cords:

A

medial pectoral (C8, T1)
medial cutaneous nerve of arm (T1)
medial cutaneous nerve of forearm (C8, T1)

32
Q

branches:

A

musculocutaneous (C5, 6, 7)
axillary (C5, 6)
radial (C5, 6, 7, 8, T1)
median (C6, 7, 8, T1)
ulnar (C8, T1)

33
Q

draw the brachial plexus

A

refer back to notes

1022 ANATOMY (10 decks)

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