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August 23, 1968Science

Magnetoencephalography: Evidence of Magnetic Fields Produced by Alpha-Rhythm Currents

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Authors

DCDavid Cohen

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Overview

Randomized trial demonstrates weak magnetic fields produced by alpha-rhythm in humans, implying neural dynamics in brain activity.

Key Points

  • This research aims to demonstrate the presence of weak magnetic fields produced by alpha-rhythm currents outside the human scalp.
  • Utilized a multilayer magnetically shielded chamber for accurate measurements.
  • Reduced background magnetic noise through signal-averaging techniques.
  • Measured fields near the scalp, estimating approximately 1 x 10(-9) gauss.
  • Detected weak alternating magnetic fields demonstrating left-right symmetry.
  • Averaging technique highlighted the distribution of alpha-rhythm currents.

Cite This Study

David Cohen (1968) studied this question.

synapsesocial.com/papers/6a131217257f24f1de9ec9c5https://doi.org/10.1126/science.161.3843.784
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