Sensory:

1. Posterior digits 1,2,3, 4 ½ (excluding fingertips)

2. middle ⅓ of the posterior forearm (PCNF)

3. anterolateral arm (ILCNA)

Motor:

Finger extension

Wrist extension

BR: forearm flexion in neutral position

Supinator (supination)

vs C7 Injury

Radial but not C7

• Sensory:
  • Dorsal thumb
• Motor:
  • Supinator (C6)
  • BR (elbow flexion) - (C5, C6)
• Reflex:
  • Brachioradialis Reflex

C7 but not Radial

• Sensory:
  • Palm extension of middle finger (Median)