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In an earlier study it was shown that an isotonic salt solution within a measuring chamber of a cytopherometer is rotating caused by Lorentz forces, if the magnetic earth field crosses the electric field in the chamber. This may be a model of the ability of certain higher organisms to recognize the direction of the magnetic earth field. The topic of this study was the possible effect of the magnetic earth field in humans. It is shown that the duration of REM latency is influenced by the position of sleepers in N-S or E-W direction: it is shortened in E-W direction (p = 0.02).

Dependence of a Sleeping Parameter from the N-S or E-W Sleeping Direction