Study type: Medical/biological study (experimental study)

Extremely low-frequency magnetic fields effects on the snail single neurons med./bio.

Published in: Electromagn Biol Med 2008; 27 (4): 409-417

Aim of study (acc. to author)

To study the influence of extremely low frequency electromagnetic fields utilized in cell phones on the habituation process of the mollusk single neuron to intracellular stimuli.

Background/further details

Habituation is regarded as a form of non learning, in which responses to repeated stimuli decrease over time. Individual neurons react to stimulant intracellular impulses with action potentials and then habituation arises. 33 different nerve preparations (giant neurons) were used for each stimulation condition: Neuron 3 of the left parietal ganglion and neuron 3 of the right parietal ganglion.
At the beginning of the recording the threshold of action potential triggering was determined. The amplitude was increased until action potential appeared as a reaction. Intracellular stimulation was continued after establishing habituation and at the same time the neuron was exposed to magnetic fields.



Exposure Parameters
Exposure 1: 8.34–217 Hz
Exposure duration: not given

Exposure 1

Main characteristics
Frequency 8.34–217 Hz
Exposure duration not given
Exposure setup
Exposure source
Setup pair of Helmholtz coils with a diameter of 11 cm, 5.5 cm apart; cells placed in the center of the coil system
Measurand Value Type Method Mass Remarks
magnetic flux density 1 mT peak value calibration - -
magnetic flux density 6 mT peak value calibration - 1 - 6 mT

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • before exposure
  • during exposure

Main outcome of study (acc. to author)

Exposure of the neuron to the low frequency electromagnetic fields caused dehabituation to the intracellular stimulus, i.e. the neuron restarted to to trigger action potentials. The dehabituation depends on the frequency of the extremely low frequency magnetic field. The effect was proportional to the magnetic induction peak value.
The results indicate that athermal magnetic field exposures can alter habituation in brain neurons. The observed dehabituation by electromagnetic fields might be regarded as destruction of the normal functioning of the neuron.

Study character:

Study funded by

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