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Synaptic neurone activity under applied 50 Hz alternating magnetic fields.

A C Calvo1, M J Azanza

  • 1Instituto de Bioelectromagnetismo, Alonso de Santa Cruz, Facultad de Medicina, Universidad de Zaragoza, Spain.

Comparative Biochemistry and Physiology. Part C, Pharmacology, Toxicology & Endocrinology
|December 1, 1999
PubMed
Summary

50 Hz alternating magnetic fields mimic synaptic effects of glutamate and caffeine on neurones. Calcium ions are key to this interaction, influencing neurone plasma membrane activity.

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Area of Science:

  • Neuroscience
  • Biophysics

Background:

  • Neuronal synaptic activity is modulated by various chemical and physical factors.
  • Understanding the influence of electromagnetic fields on neuronal function is crucial for neurobiology and medicine.

Purpose of the Study:

  • To investigate the effects of 50 Hz alternating magnetic fields (AMFs) on neurone synaptic activity.
  • To compare AMF effects with those of glutamate and caffeine.
  • To elucidate the role of calcium ions (Ca2+) in mediating these responses.

Main Methods:

  • Exposure of neurones to 50 Hz AMFs at intensities of 10-150 Gauss (1-15 mT).
  • Assessment of synaptic activity induced by glutamate and acetylcholine.
  • Application of Ringer solutions with varying Ca2+/K+ concentrations.

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Main Results:

  • 50 Hz AMFs did not alter synaptic activity induced by glutamate or acetylcholine.
  • Caffeine and glutamate exhibited similar stimulatory or inhibitory effects on different neurone types.
  • 50 Hz AMFs mimicked the synaptic effects of glutamate and caffeine.
  • Ca2+ ions were implicated in the responses to AMFs, caffeine, and glutamate.

Conclusions:

  • 50 Hz AMFs exhibit a mimic effect on neurone synaptic activity comparable to glutamate and caffeine.
  • Calcium ions act as cytosolic effectors in the interaction between 50 Hz AMFs and the neurone plasma membrane.