The diagnostic sensitivity of different F wave parameters
- Dr Frank Weber, Department of Neurology, Clinical Neurophysiology, Military Hospital, D-89070 Ulm/Donau, Germany.
- Received 2 June 1997
- Revised 4 March 1998
- Accepted 9 March 1998
Abstract
OBJECTIVE To examine the relative diagnostic sensitivity of various F wave parameters.
METHODS Normal values for minimum, mean, and maximum F wave latency, chronodispersion, and persistence in the four major motor nerves were established and systematically applied to at least four separate categories of patients (radiculopathies, polyneuropathies, mononeuropathies, and others). F Waves were studied both isolated and in comparison with other motor nerve conduction parameters.
RESULTS F Chronodispersion was the most often abnormal parameter, particularly in lumbosacral radiculopathies. Minimum F wave latency was more useful in polyneuropathies. Compared with minimum F wave latency, F chronodispersion was able to identify most additional cases.
CONCLUSIONS F Wave studies should include minimum F wave latency and chronodispersion.
