Experimental simulation of the effects of increased geomagnetic activity upon nocturnal seizures in epileptic rats.

Abstract:

:This experiment was designed to simulate experimentally the specific parameters of geomagnetic activity that evoke epileptic seizures. The numbers of overt limbic seizures (rearing, paroxysmal forelimb clonus and falling) in a population of epileptic rats were recorded nightly for 65 successive days between 0200 and 0400 h during red light conditions. On some nights an experimental 7 Hz magnetic field whose magnitudes shifted in successive steps from zero to approximately 50 nT every 3 min was presented. The partial regression coefficients from the analysis indicated that either the presence of the 'synthetic' geomagnetic activity or increased magnitudes of the daily, natural geomagnetic activity (regional range approximately 10-70 nT) during the observational period significantly (P < 0.05) increased the proportion of nightly seizures. The effect sizes (6-8%) for both magnetic sources were comparable and additive. Concerted efforts to experimentally simulate the temporal profiles of geomagnetic activity may help reveal the neuromechanisms by which biobehavioral changes during geomagnetic perturbations occur within susceptible populations.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Michon AL,Persinger MA

doi

10.1016/s0304-3940(97)13446-2

subject

Has Abstract

pub_date

1997-03-07 00:00:00

pages

53-6

issue

1

eissn

0304-3940

issn

1872-7972

pii

S0304-3940(97)13446-2

journal_volume

224

pub_type

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