The purpose of this study was to investigate the influence of afferent stimuli,
transcutaneous electrical nerve stimulation and ultra sound, on the electrdiagnostic study
of normal subjects.
Electrodiagnostic study was performed before and after the application of afferent
stimulation of the right popliteal fossa on 18 healthy female volunteers. After the
transcutaneous electrical nerve stimulation, there is no significantly change of latencies
and amplitudes of SEP, H-reflex, peroneal nerve F-wave, and sensory nerve conduction.
After the ultra sound, there is no significantly change of latencies and amplitudes of
SEP, H-reflex, peroneal nerve F-wave, and sensory nerve conduction. Tibial nerve
F-wave and motor nerve shows prolonged latency after TENS and US(p<0.01).
Ultrasound may have a similar mechanism of action compared to transcutaneous
electrical nerve stimulation by having localized inhibitory effects of the peripheral nerve.
However, further investigation is needed to assess their mechanism of action and the
precise relevance of stimulation modality
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