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A normative study on human facial F waves.

C Wedekind1, W Stauten, N Klug

  • 1Department of Neurosurgery, University of Cologne, D-50924 Cologne, Germany. DrChrWedekind@web.de

Muscle & Nerve
|June 19, 2001
PubMed
Summary

Facial F waves, recorded via facial nerve stimulation, show consistent latencies and conduction times in healthy individuals. These parameters, similar to limb muscles, are reliable for establishing reference values.

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Area of Science:

  • Neuroscience
  • Electrophysiology

Background:

  • F waves are electrophysiological responses used to assess nerve function.
  • Facial F waves, specifically from the nasalis muscle, have been less studied than those from limb muscles.

Purpose of the Study:

  • To investigate the characteristics of F waves from the nasalis muscle.
  • To determine the reliability and reference values for facial F waves.

Main Methods:

  • Transcutaneous constant-current stimulation of the facial nerve in 42 healthy volunteers.
  • Recording and analysis of F waves from the nasalis muscle, assessing parameters like latency, amplitude, and chronodispersion.

Main Results:

  • F waves were successfully obtained in 88% of participants.
  • Minimum and mean F-wave latencies and peripheral conduction times (PCT) showed normal distribution and correlated positively with body height.
  • Chronodispersion and amplitudes were broadly scattered, indicating less reliability for these specific parameters.

Conclusions:

  • Facial F-wave latencies and conduction times are suitable for establishing reference values.
  • Facial F waves share characteristics with F waves recorded from limb muscles, suggesting similar physiological underpinnings.

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