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Magnetite biomineralization in the human brain

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Authors not listed · 1992

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Human brains contain millions of magnetic crystals that could make us naturally sensitive to electromagnetic fields.

Plain English Summary

Summary written for general audiences

Scientists discovered magnetite crystals naturally occurring in human brain tissue for the first time, finding millions of these magnetic particles per gram in various brain regions. The crystals resemble those found in magnetotactic bacteria and fish, suggesting biological formation. This discovery may explain how low-frequency magnetic fields could potentially affect brain function.

Why This Matters

This groundbreaking discovery fundamentally changes our understanding of how electromagnetic fields might interact with the human brain. The presence of millions of magnetite crystals per gram of brain tissue provides a plausible biological mechanism for EMF effects that the wireless industry has long claimed don't exist. Put simply, these naturally occurring magnetic particles could act like tiny antennas, making our brains inherently sensitive to external magnetic fields.

What this means for you is that the brain isn't the electromagnetically inert organ that regulators assume when setting safety standards. The reality is that everyday EMF sources - from power lines to wireless devices - operate at frequencies that could potentially interact with these biological magnets. While more research is needed to understand the full implications, this study provides compelling evidence that our brains are far more electromagnetically sensitive than previously recognized.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (1992). Magnetite biomineralization in the human brain.
Show BibTeX
@article{magnetite_biomineralization_in_the_human_brain_ce2274,
  author = {Unknown},
  title = {Magnetite biomineralization in the human brain},
  year = {1992},
  doi = {10.1073/PNAS.89.16.7683},
  
}

Quick Questions About This Study

The study found a minimum of 5 million magnetite crystals per gram in most brain tissues, with protective membranes (pia and dura) containing over 100 million crystals per gram - concentrations comparable to magnetotactic bacteria.
The human brain magnetite crystals show crystal morphologies and structures that strongly resemble those produced by magnetotactic bacteria and fish, suggesting they form through similar biological processes rather than environmental contamination.
Yes, magnetic property measurements indicate the magnetite crystals don't exist individually but form clumps containing between 50 and 100 particles each, which could amplify their electromagnetic sensitivity compared to isolated crystals.
The researchers suggest that biogenic magnetite in human brains may account for high-field saturation effects observed in T1 and T2 values during magnetic resonance imaging, providing a biological explanation for these phenomena.
Magnetite crystals are naturally magnetic and could act as biological sensors for external magnetic fields. The study suggests this may explain various biological effects observed from low-frequency magnetic field exposure.