Setup – Tibial Motor NCS

aka “medial plantar motor”

Electrode placement (use the bar electrode)

• E1 (black):  Abductor hallucis brevis (AHB) muscle (drop off the navicular bone and go 1-cm proximal)
• E2 (red):  Distally along the long axis of the foot
• Ground:  Medial ankle (between stimulation and pickup)

Stimulation sites

• Two sites
  • Ankle (medial)
    • (-) Cathode (black):  8-cm proximal to E1 (measured line curving behind the medial malleolus)
    • (+) Anode (red):  proximal
  • Popliteal fossa (mid)
    • (-) Cathode (black):  Popliteal fossa (middle)
    • (+) Anode (red):  proximal

      

Additional Information

• Type of stimulation = Orthodromic
• 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