Part 2: Axilla Flashcards Preview

Anatomy - Upper Limb > Part 2: Axilla > Flashcards

Flashcards in Part 2: Axilla Deck (21)
Loading flashcards...
1
Q

Floor of the axilla

A

Floor is the axillary fascia – extends from serratus anterior fascia to the fascia of the forearm

  • Which is suspended by the suspensory ligament
  • Attached in front and behind by axillary folds
2
Q

Anterior wall of axilla

A

Pectorals, subclavius and clavicopectoral fascia

3
Q

Posterior wall of axilla

A

subscapularis and teres major

4
Q

Medial wall of axilla

A

Serratus anterior

5
Q

Apex of axilla

A

Bound by clavicle, scapula and outer border of first rib

6
Q

Borders of quadrangular space

A
roof - subscap
floor - teres major
lateral border - humerus
medial border - long head of triceps
(roof is teres minor when viewed from behind)
7
Q

Contents of quadrangular space

A

Axillary nerve, posterior circumflex artery and vein

8
Q

Triangular space

A

Roof - teres major
lateral side - humerus
medial side - long head of triceps

9
Q

Contents of triangular space

A

Radial nerve and profunda brachii vessels

10
Q

Subclavian artery becomes axillary artery at which point?

A

As enters axilla over 1st digitation of Serratus anterior

11
Q

Brachial artery begins where

A

Continuation of axillary artery at lower border of teres major

12
Q

Where does the first part of axillary artery end and what are its branches

A

above pec minor - 1 branch - superior thoracic artery

13
Q

Describe 2nd part of axillary artery and branches

A

behind pec minor (3 cords of BP clasp it)
2 branches - Thoracoacromial (pierces clavicopectoral fascia and then 4 branches; clavicular, deltoid, acromial and pectoral) and lateral thoracic artery (supplies pecs and breast)

14
Q

Describe 3rd part of axillary artery and branches

A

starts at inferior border pec minor (clasps by cords of median nerve)
3 branches - Subscapular (largest branch gives off circumflex and becomes thoracodorsal to supply lat dorsi), anterior circumflex, posterior circumflex

15
Q

Branches of BP roots

A

R1: Dorsal scapular (rhomboids)
R2: Nerve to subclavius
R3: Long thoracic (serratus anterior)

16
Q

Branch of upper trunk

A

Suprascapular - supra + infraspinatus and twig to shoulder joint

17
Q

Branches of lateral cord of BP

A
3 branches
L1: lateral pectoral (pec major/minor)
L2: Musculocutaneous 
(coracobrachialis, brachialis, biceps) 
L3: Lateral root of median nerve
18
Q

Branches of posterior cord

A
5 branches
P1: Upper subscapular (subscapularis)
P2: Thoracodorsal (lat dorsi)
P3: Lower subscapular (subscap and teres major)
P4: Axillary nerve
P5: Radial nerve
19
Q

Branches of medial cord

A
5 branches
M1: medial pectoral (pec major and minor)
M2: medial root of median nerve
M3: medial cutaneous of arm (skin)
M4: Medial cutaneous of forearm (skin)
M5: Ulnar
20
Q

Groups and lymph nodes in axilla and drainage

A

Anterior/pectoral - upper half trunk and breast
Posterior - upper half posterior trunk
Lateral - upper limb
Central - collect from above groups
Apical - receives from above and drains supraclavicular nodes

21
Q

Describe axillary vein

A

Venae comitantes of brachial artery are joined by basilic vein to form axillary vein. Tributaries in 2nd and 3rd part are as in axillary artery. Cephalic artery enters into 1st part after piercing clavicopectoral fascia