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The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
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Fields or firings? Comparing the spike code and the electromagnetic field hypothesis.

Tam Hunt1, Mostyn Jones2

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PubMed
Summary

Consciousness may arise from the brain's electromagnetic (EM) fields, not just synaptic firing. These EM fields, generated by neural activity, may unify and guide conscious cognition, proposing a new electromagnetic field hypothesis.

Keywords:
EM-field theories of consciousnessconsciousnesscross-frequency coupling (CFC)ephaptic couplinggeneral resonance theoryspike codes

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Area of Science:

  • Neuroscience
  • Biophysics
  • Cognitive Science

Background:

  • Current neurobiological theories primarily link consciousness to synaptic firing and "spike codes."
  • The precise physical substrate and mechanisms of consciousness remain largely unknown.
  • Neurons generate electromagnetic (EM) fields through various electrochemical processes.

Purpose of the Study:

  • To propose the "electromagnetic field hypothesis" of consciousness.
  • To suggest that brain-generated EM fields, both local and global, may be the primary seat of consciousness.
  • To explore the functional role of EM fields in the brain.

Main Methods:

  • Review and discussion of existing neurobiological theories and evidence.
  • Analysis of the relationship between neuroanatomy, EM fields, and consciousness.
  • Examination of the limitations of the "spike code" approach.

Main Results:

  • Electromagnetic fields, not identical to neuroanatomy, are produced by the brain.
  • These EM fields offer more granular spatial and temporal insights into brain function.
  • Evidence suggests oscillating neural EM fields may drive oscillating neural circuits, aiding conscious cognition.

Conclusions:

  • The electromagnetic field hypothesis posits that brain EM fields are central to consciousness.
  • EM fields, working with synaptic firing and neuroanatomy, contribute to the complexity of the mind.
  • Further research into EM fields is crucial for understanding consciousness.