A method for detecting the effect of magnetic field on activity changes of neuronal populations of Morimus funereus (coleoptera, cerambycidae)

Abstract

Modification of a new method for detecting changes in the activities of neuronal population and the nearest neuron is described. Preliminary measurements of the influence of a static magnetic field (2 mT) on neuronal population activity on eight individuals of an endangered insect species Morimus funereus are included. Five minutes exposure produced both excitatory (5/8) and inhibitory (3/8) effect on the activity of neuronal population of M. funereus antennal lobe. However, when the reversibility of induced effects was quantitatively analyzed, our results showed that they were prevailingly irreversible: (7/8) for the population, (6/8) for the nearest neuron.

Effects of two different waveforms of ELF MF on bioelectrical activity of antennal lobe neurons ofMorimus funereus(Insecta, Coleoptera)

“…The average value of the magnetic induction on the head surface was 2 mT, measured with a GM05 Gaussmeter (Model GM05, proba PT 2837; Hirst Magnetic Instruments, Cornwall, UK). The induction of 2 mT was chosen on the basis of our previous studies (Prolić et al 2003, Todorović et al 2007) and others in the literature (Pozzi et al 2007, Ilijin et al 2011b). Average values of the local geomagnetic field (44°38′N, 20°46′E), measured during the experimental period by a GSM-19 v6.0 proton magnetometer (Gem Systems Inc., Ontario, Canada), were 41756 nT for the vertical component and 22737 nT for the horizontal component (Department for the Geomagnetism and Aeronomy, Republic Geodetic Authority, Republic of Serbia).…”

“…Taking the above into account, we examined the effects of ELF MF on the nervous system of the longhorn beetle Morimus funereus (Coleoptera, Cerambycidae), which has been proved sensitive to constant MF (Todorović et al 2007). We looked to see if ELF MF (50 Hz, 2 mT) of different characteristics (exposure duration, waveform) could have effects on spontaneous bioelectrical activity of antennal lobe neurons of adult M. funereus.…”

RR interval–respiratory signal waveform modeling in human slow paced and spontaneous breathing

“…Monotone segment signal analysis was used in our previous works as an effective and relatively simple method for extracting essential information from sources such as the extracellular and respiratory neurophysiological signals (Todorovic et al, 2007;Bojić , 2008). Simply speaking, it consists of detecting and extracting a series of local extremums from the raw signal, and storing it for further analysis.…”

Monotone Signal Segments Analysis as a novel method of breath detection and breath-to-breath interval analysis in rat

“…In order to study basic statistical properties of monotone segment heights, in our previous work we constructed their respective occurrence histograms before and after an experimental intervention (Todorovic et al, 2007). Such a histogram is in fact the distribution of the number of detected mss, N(h(mss +/− )), which have heights that fall between h(mss +/− ) and h(mss +/− )+ δh(mss +/− ), where δh(mss +/− ) denotes the incremental histogram abscissa interval.…”

“…Monotone Signal Segments Analysis (MSSA) has previously been employed as a tool to measure changes in neuronal unit (Jankovic, 2000;Todorovic et al, 2007) or neuronal population activity (Todorovic et al, 2007). A similar methodological approach was used for the analysis of linear decreases and increases of arterial blood pressure and pulse interval (Bertinieri, 1988;Zoccoli et al, 2001;Parati et al, 2006).…”