Magnetic evoked potential: verification?
- Authors
- Dr. med. K Trinus (Kyiv, Ukraine)
- Proceedings
- XXX Congress of the NES - Oporto - Portugal
- Topics
- Neurootology
Equilibrium
Equilibriometric tests
Neurootology
Equilibrium
Neurootology - Download
PDF file, 36kB
Abstract
Magnetic impulses play major role in today environment, so it is important to estimate their influence on the human body. From this point of view the problem of correct criteria is of special value. This considerations have provoked the study proposed. The item of the study has been to try recording the brain response to magnetic impulse.
8 healthy volunteers have been invited for this study. For recording we have used “Sensitivity Analyzer”, produced by TRINUS co (Kyiv, Ukraine). We have studied both short and long latency reactions. For magnetic stimulation we have constructed special device, producing almost stepwise magnetic stimulus of 2 ms long.
In all the volunteers we have recorded the response, consisting from a series of peaks with average latencies of (P – positive to vertex, N – negative to vertex):
P – 2.6± 0.4 ms, N – 4.9±0.3 ms, P – 7.7±0.4, N – 11.6±0.7, P – 15.4±0.9, N – 23.4±0.8, P – 35.0 ±0.8ms, N – 44.7±0.9, P 55.1±1.1, N – 65.0±0.9, P – 76.0 ±1.0, N – 86.3±2.8, P – 101.7±8.8, N – 121.7±21.9, P – 139.7±23.6, N – 215.8±27.7, and P – 245.5±36.9 ms.
The peaks obtained do not coincide with those for acoustic evoked potentials.
It seems very optimistic to find magnetic sensor in human body, but we have to make a very serious verification procedure before putting forward such a statement.
