Brachial plexus

Question 1

Ulnar nerve

Answer 1

• C8–T1
• Medial 1½ fingers
• Small muscles of hand
• Claw hand

Question 2

Radial nerve

Answer 2

• C5–T1
• Dorsal tips of lateral 3½ fingers
• Wrist and finger extension
• Wrist drop, unable to extend fingers

Question 3

Erb’s palsy

Answer 3

• C5–C6
• Abduction of shoulder, flexion of elbow, supination
• Waiters tip

Question 4

Klumpke’s palsy

Answer 4

• C8–T1
• Medial arm/forearm/hand and medial 2 fingers
• Intrinsic muscles of hand
• Claw hand