[A weak low-frequency magnetic field initiates the frequency dependent fluctuations of Daphnia magna heart contraction period].
The influence of low-frequency (16 Hz) sinusoidal magnetic field on period of Daphnia magna heart beatings was studied. Heart beatings were registered by optical method. Fluctuations of period of heart beatings were analyzed using fast Fourier transform algorithm. It was shown that alternating (16 Hz) magnetic field with magnetic induction of 140 microT combined with direct magnetic field (magnetic induction of 21 microT) causes the appearance of frequency-dependent maxima in the power spectra of heart beating fluctuations. The dynamics of the field effect was studied as the phases of its development, rise and fall, as well as temporal characteristics were determined. It was proposed that sensor of low-frequency magnetic field is incorporated in one of the regulatory pathways, controlling rhythmical beating activity.
N K
NK
Chemeris
V G
VG
Safronova
D000818:Animals; D003621:Daphnia / Q000502:physiology*; D005583:Fourier Analysis; D006339:Heart Rate; D008280:Magnetics
Slaboe nizkochastotnoe magnitnoe pole initsiruet chastotno-zavisimye fluktuatsii perioda sokrashcheniĭ serdtsa Daphnia magna.