The Brachial Plexus and Nerve Distribution in the Upper Limb (AP) Flashcards
1
Q
Which structures form the apex of the axilla?
A
- Lateral margin of rib 1
- Clavicle
- Superior margin of scapula to coracoid process
2
Q
Which structures form the medial wall of the axilla?
A
- Upper thoracic wall
- Serratus anterior
3
Q
Which structures form the anterior wall of the axilla?
A
- Pectoralis major
- Pectoralis minor
- Subclavius
- Clavipectoral fascia
4
Q
Which structures form the posterior wall of the axilla?
A
- Subscapularis
- Teres major
- Latissimus dorsi
- Long head of triceps brachii
- Biceps brachii
5
Q
Which structures form the base of the axilla?
A
- Skin
- Axillary fascia
6
Q
Contents of the axilla
A
- Anterior trunks of brachial plexus
- Axillary artery
- Axillary vein
- 5 axillary lymph nodes
7
Q
What is Erb’s palsy and which nerves are involved?
A
- Brachial plexus birth palsy causing paralysis to the upper extremity
- C5 and C6
8
Q
What does the musculocutaneous nerve supply with motor innervation?
A
Muscles of the anterior compartment of the arm
9
Q
What does the axillary nerve supply with motor innervation?
A
- Deltoid
- Teres minor
10
Q
What does the median nerve supply with motor innervation?
A
- Muscles of the anterior compartment of the forearm (except flexor carpi ulnaris and medial half of flexor digitorum profundus)
- Thenar muscles
- 2 most lateral lumbrical muscles
11
Q
What does the radial nerve supply with motor innervation?
A
Muscles of the posterior compartments of the arm and forearm
12
Q
What does the ulnar nerve supply with motor innervation?
A
- Intrinsic muscles of the hand (except thenar muscles and 2 most lateral lumbrical muscles)
- Medial half of flexor digitorum profundus
