Myopathy

Nerve             Recording Sites        Stimulation Sites         F-Waves

Median (s)         index                wrist    
   or
Radial (s)         thumb                  forearm

Median (m)        APB                wrist and elbow             wrist
Sural (s)        ankle                calf
Peroneal (m)        EDB                ankle and above knee    ankle
    or
Tibial (m)        AH                ankle and knee        ankle    

If motor amplitudes are low, perform post-exercise stimulation (10-sec exercise) on distal motor nerves (2-3 nerves) to check for Lambert-Eaton Syndrome.

Needle Examination

Perform needle exam on at least three muscles in the upper and lower extremities on the same side of the body with emphasis on proximal muscles.