Effects of the static and ELF magnetic fields on the neuronal population activity in Morimus funereus (Coleoptera, Cerambycidae) antennal lobe revealed by wavelet analysis
Апстракт:
To study the influence of a static magnetic field (SMF, 2 mT) and
extremely low frequency magnetic field (ELF MF, 50 Hz, 2 mT) on the
neuronal population activity, the experiments were performed on adult
longhorn beetles Morimus funereus (Coleoptera, Cerambycidae). Based on a
wavelet analysis of the local field potentials (LFPs), our study showed
for the first time that the effects of prolonged and repeated exposure
to the ELF MF on the LFPs were irreversible within investigated time
frame. The relative wavelet energy (RWE) of 4-8 Hz frequency band was
significantly increased after sine ELF MF (SnMF)/square ELF MF (SqMF) in
comparison to the control value. The RWE of slower oscillations (1-2 Hz)
was significantly decreased after the repeated exposures to either SnMF
or SqMF. The SqMF induced decreasing of the faster waves in the range of
64-128 Hz. However, we did not prove with presented methods that
exposure to the SMF for 5 min produces any effects on the neuronal
population activity. This study has proved the wavelet transform as a
valuable tool for measuring the effects of SMF and ELF MF on the
neuronal population activity in M. funereus antennal lobe. (C) 2014
Elsevier Inc All rights reserved.