Electrode placement (use the bar electrode)
- E1 (black): Posterior and superior to the medial malleolus
- E2 (red): Proximal
- Ground: Medial ankle (between stimulation and pickup)
Stimulation sites
- Medial Plantar Nerve
- (-) Cathode (black): 14-cm distal to E1 on the medial plantar foot (measured line curving behind the medial malleolus)
- (+) Anode (red): distal
- Lateral Plantar Nerve
- (-) Cathode (black): 14-cm proximal to E1 on the lateral plantar foot (measured line curving behind the medial malleolus)
- (+) Anode(red): distal
14-cm distance (around the medial malleolus)
Additional Information
- This is a mixed nerve test – though used mostly as a sensory test
- Especially useful when evaluating for tarsal tunnel syndrome
- Difficult test to perform, therefore:
- May need to perform side-to-side comparisons (comparing amplitude and peak latency)
- CPT codes for nerve conduction studies
- 95900 Nerve conduction, amplitude and latency/velocity study, each nerve; motor, without F-wave study
- 95903 Nerve conduction, amplitude and latency/velocity study, each nerve; motor with F-wave study
- 95904 Nerve conduction, amplitude and latency/velocity study, each nerve; motor with F-wave study, each nerve; sensory
- 95934 H-reflex, amplitude and latency study; record gastrocnemius/soleus muscle
- 95936 Record muscle other than gastrocnemius/soleus muscle
What would be the normal onset and peak latencies for plantars?