Selective action of decimeter waves on central brain structures.

Area of Science:

• Neuroscience
• Electrophysiology
• Bioelectromagnetics

Background:

• Central nervous system structures exhibit varying sensitivities to external stimuli.
• Electromagnetic fields (EMF) are increasingly studied for their biological effects.
• Decimeter waves (DW) represent a specific frequency range within the electromagnetic spectrum.

Purpose of the Study:

• To investigate the impact of decimeter wave electromagnetic fields (EMF of DW) on neuronal activity in central brain structures.
• To identify brain regions with the highest sensitivity to EMF of DW.
• To characterize the nature of neuronal responses (excitatory vs. inhibitory) to EMF of DW.

Main Methods:

• Dynamic investigation of single-unit neuronal activity.
• Exposure of brain tissue to electromagnetic fields of decimeter waves.
• Analysis of neuronal firing patterns and response types (excitatory/inhibitory).

Main Results:

• Neurons in the hippocampus and hypothalamus demonstrated the greatest excitatory reactivity to EMF of DW.
• Neurons in the mesencephalic reticular formation and specific thalamic nuclei predominantly showed inhibitory responses.
• The proportion of active and inactive neurons varied significantly with the energy density of the EMF of DW.

Conclusions:

• Specific central brain structures, notably the hippocampus and hypothalamus, are highly sensitive to EMF of DW.
• EMF of DW can induce both excitatory and inhibitory neuronal responses, depending on the brain region.
• Neuronal responsiveness to EMF of DW is modulated by the field's energy density.