Upper Extremities
Motor Function | Nerve-Root Level |
Raises elbow to shoulder | Deltoid, C-5 |
Flexes forearm | Biceps, C-6 |
Extends forearm | Triceps, C-7 |
Flexes wrist, fingers | C-8 |
Spreads fingers | T-1 |
Lower Extremities
Motor Function | Nerve-Root Level |
Flexes hip | Iliopsoas, L-2 |
Extends knee | Quadriceps, L-4 |
Dorsiflexes ankle | Tibialis anterior, L-5 |
Plantarflexes ankle | Gastrocnemius, S-1 |
Hand Exam
OK sign | median nerve |
spread fingers | ulnar nerve |
wrist extension ("stop!") | radial nerve |