Abstract
This study was performed to create a normative database for median nerve F-wave responses for a large subject population so normal ranges could be created for subsets of the general population and the effect of various physical characteristics on F-wave results could be determined. One hundred ninety-five asymptomatic subjects without risk factors for neuropathy were recruited. Ten consecutive supramaximal stimuli were applied to the wrists of each arm to obtain median nerve F-wave results. The shortest F-wave latency (Fmin), mean latency (Fmean), range of latencies (Frange), and number of stimuli that resulted in F-wave recordings (Fpersist) were recorded. An analysis of variance revealed that age, gender, and height were associated with different results for Fmin and Fmean. For all subjects taken together, the mean Fmin was 26.8 +/- 2.4 ms. The mean Fmean was 28.3 +/- 2.6 ms, and the mean Frange was 3.4 +/- 1.9 ms. Five or more F-waves were elicited in 94% of the subjects. The mean side-to-side difference in Fmin was 0.2 +/- 1.2 ms. Additional findings are presented in the article.
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