Enhancement or Reduction of Calcium-Ion Efflux from Brain Tissues in Vitro Following Exposure to Elf Fields Depending on Intensity of Local Geomagnetic Field

Abstract

⁴⁵Ca²⁺-preincubated chicken brains were exposed to 16 Hz electric (E), magnetic (B) or electromagnetic (E/B) fields at two different intensities of local geomagnetic field (LGF) - normal (49.4 μT) and reduced (19.0 μT). At the LGF of 49.4 μT an increase of the efflux of ⁴⁵Ca²⁺ from brain tissues was observed under the influence of mixed E (0.48 V_p·p/m in water) and B (59.5 nT/rms) fields, while both the components applied separately did not influence the ⁴⁵Ca²⁺ efflux. However, at the reduced LGF (19.0 μT) the mixed 16 Hz E/B fields lowered the calcium efflux, with both E and B fields applied separately being not effective.