The F waves study in young healthy individuals

Subedi P.; Limbu N.; Thakur D.; Khadka R.; Gupta S.

doi:10.18203/2320-6012.ijrms20181749

Authors

Subedi P. Department of Basic and Clinical Physiology, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
Limbu N. Department of Basic and Clinical Physiology, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
Thakur D. Department of Basic and Clinical Physiology, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
Khadka R. Department of Basic and Clinical Physiology, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
Gupta S. Department of Basic and Clinical Physiology, B.P. Koirala Institute of Health Sciences, Dharan, Nepal

DOI:

https://doi.org/10.18203/2320-6012.ijrms20181749

Keywords:

F chronodispersion, F persistence, F wave

Abstract

Background: The F wave is a CMAP (compound muscle action potential) evoked by a supramaximal stimulation of a motor nerve. F waves are particularly useful for the diagnoses of polyneuropathies at an early stage and proximal nerve lesions.

Methods: Healthy males (n=64) and females (n=26) medical students of BPKIHS with age 20 to 24 years were enrolled. Anthropometric parameters; F wave latencies, persistence and chronodispersion of bilateral median, ulnar and tibial nerves were recorded in Neurophysiology Lab II of BPKIHS. Descriptive analysis was done.

Results: Mean age, height and weight of the subjects were 21.64±1.19 years, 165.61±5.4cms and 64.07±5.5kg. Mean minimum F wave latencies (ms) of right median, ulnar and tibial nerves were 24.09±1.95, 24.02±1.76, 44.34±3.02 while on the left side were 23.92±1.96, 24.11±1.92, 44.07±2.83 respectively. F persistence was above 80%. F chronodispersion (ms) for right and left median, ulnar and tibial nerves were 2.77±0.70, 2.79±0.65, 2.71±0.67, 2.80±0.56, 3.48±0.73 and 3.45±0.64 respectively.

Conclusions: Maximum and minimum F wave latencies, F chronodispersion and F persistence were derived for both sexes in an age group of 20-24 years.

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