Axilla and neurovascular input to the upper arm Flashcards Preview

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Flashcards in Axilla and neurovascular input to the upper arm Deck (27)
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1

What forms the anterior wall of the Axilla?

Pectoralis Major + Minor + Subclavius

2

What forms the posterior wall of the axilla?

Latissmus Dorsi + Teres Major + Subscapularis

3

What forms the medial wall of the axilla?

Thoracic wall + Serratus anterior

4

What forms the lateral wall of the axilla?

Intertubercular groove of humerus

5

What are the contents of the axilla?

  • Axillary artery
  • Axillary vein
  • Axillary lymph nodes
  • Brachial plexus
  • Biceps Brachi (short head) and coracobrachialis

6

At what anatomical point does the axillary artery begin?

Lateral margin of 1st rib

7

At what anatomical point does the brachial artery begin?

Lower margin of teres major

8

What nerve roots constitute the Brachial plexus?

C5-T1

9

What nerve roots form the upper trunk of the brachial plexus?

C5-6

10

What nerve roots form the middle trunk of the brachial plexus?

C7

11

What nerve roots form the lower trunk of the brachial plexus?

C8-T1

12

What is Erb's point?

  • Erb's point is the convergance of C5+C6 when they form the upper trunk
  • If damaged this can cause Erb's palsy

13

What is Erb's palsy?

  • Injury to the upper trunk of brachial plexus
  • Results in "waiters tip" of upper limb
  • Arm is medially rotated, wrist flexed

14

What muscles are affected in Erb's palsy

  • Deltoid
  • Wrist extensors
  • Elbow flexors

15

What can cause Erb's palsy?

  • Hyperextension of head form shoulder
  • I.e Fall on shoulder, birth injury or iatrogenic

16

What is Klumpke's palsy?

  • Injry to the lower trunk of the brachial plexus
  • Affects intrinisc muscles of hand and ulnar flexors of wrist and fingers

17

What causes klumpkes palsy?

Hyper abduction of the arm

18

What are the cords of the brachial plexus?

Lateral Medial Posterior

19

What are the branches of the lateral cord of the brachial plexus?

  • Lateral pectoral nerve
  • Median nerve (lateral root)
  • Musculocutaneous nerve

20

What are the branches of the medial cord of the brachial plexus?

  • Medial pectoral nerve (C8-T1)
  • Medial cutaneous nerve of arm (T1)
  • Medial cutaneous nerve of forearm (C8-T1)
  • Ulnar nerve

21

What are the branches of the posterior cord of the brachial plexus?

  • Thoracodorsal
  • Axillary nerve
  • Radial nerve
  • Subscapular nerve

22

What does the lateral pectoral nerve supply?

Pectoralis major

23

What does the medial pectoral nerve supply?

Pectoralis muscles

24

What does the thoracodorsal nerve suply?

Latissimus dorsi

25

What does the subscapular nerve supply?

Teres major + Supsacpularis

26

What is the sensory value + nerve of the badge area?

Axillary nerve - C5/6

27

What are the different axillary lymph nodes?

  • Pectoral group
  • Subscapular group
  • Apical group
  • Central group
  • Lateral group