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Last updated on Wednesday, April 29 2009 by blondarb

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The most common routine F-wave responses are recorded from the Median (APB), Ulnar (ADM), Peroneal (EDB) and the Tibial (AH) motor nerves.  However, F-waves can be recorded from any motor nerve.  F-waves vary in amplitude and latency and may not be recorded following every stimulation.

After performing a routine motor nerve conduction study distally, the following procedure should be used to record a F-Wave response:

1.    Change the sweep speed to 10 msec/div

2.    Change the gain to either 500 uv or 200 uv

3.    Change the filter settings to sensory settings

4.    Reverse the polarity of the stimulator (switch cathode and anode)

5.    Stimulate at the distal stimulation site of the nerve

6.    Record 10 responses at the minimum

7.    Record the shortest latency measurement of the 10 responses

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