Radial nerve block: stay lateral, follow the nerve beside the artery

Question 1Which area does the superficial radial nerve supply?

1. aThe palmar surface of the index finger
2. bThe back of the thumb, the first web space and the radial side of the back of the hand
3. cThe palm of the hand
4. dThe little finger

Question 2Where does the superficial radial nerve lie in the mid forearm?

1. aBeside the ulnar artery
2. bInside the extensor tendon sheaths
3. cOn the radial side of the radial artery, under brachioradialis
4. dBetween the finger flexors

Question 3Why do you use light probe pressure?

1. aHeavy pressure flattens the small nerve and nearby veins, distorting the view
2. bIt makes the bone look brighter
3. cPressure has no effect on superficial structures
4. dLight pressure makes the artery disappear

Question 4Why can a radial nerve block close to the wrist fail?

1. aThe radial artery covers the nerve completely
2. bThe nerve joins the median nerve
3. cThe nerve is deeper than the radius at the wrist
4. dThe nerve has already divided into small skin branches

Question 5Is the superficial radial nerve motor or sensory?

1. aMotor to the wrist extensors
2. bMotor to the thumb muscles
3. cPurely motor
4. dPurely sensory