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Magnetic fields of the human body

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David Cohen · 1975

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Human organs naturally produce extremely weak magnetic fields that can be measured for medical diagnosis, highlighting biological electromagnetic sensitivity.

Plain English Summary

Summary written for general audiences

This 1975 study documented early developments in measuring extremely weak magnetic fields naturally produced by human organs like the heart, brain, and lungs. Researchers found these biomagnetic measurements could become valuable diagnostic tools for detecting abnormal medical conditions. The work laid groundwork for modern biomagnetic medical imaging techniques.

Why This Matters

This foundational research from 1975 represents a crucial milestone in understanding the human body's natural electromagnetic properties. What makes this particularly relevant to today's EMF health debate is the stark contrast it highlights: while our bodies naturally produce extremely weak magnetic fields measured in femtoteslas (quadrillionths of a tesla), we now routinely expose ourselves to artificial EMF sources millions of times stronger. The diagnostic potential Cohen identified has indeed materialized into technologies like magnetocardiography and magnetoencephalography. However, this early work also underscores how sensitive our biological systems are to magnetic fields. If our organs produce such precisely measurable weak fields for normal function, it raises important questions about how the dramatically stronger artificial EMF exposures from modern technology might interfere with these delicate natural processes.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
David Cohen (1975). Magnetic fields of the human body.
Show BibTeX
@article{magnetic_fields_of_the_human_body_g5795,
  author = {David Cohen},
  title = {Magnetic fields of the human body},
  year = {1975},
  
  
}

Quick Questions About This Study

The heart, brain, and lungs naturally generate extremely weak magnetic fields as part of their normal electrical activity. These biomagnetic fields are millions of times weaker than artificial EMF sources we encounter daily from technology.
Natural human biomagnetic fields measure in femtoteslas (quadrillionths of a tesla), making them extraordinarily weak. Modern devices like cell phones and WiFi routers produce magnetic fields millions to billions of times stronger than these natural biological signals.
Yes, this 1975 research showed that measuring the body's natural magnetic fields could identify abnormal organ function. This principle led to modern diagnostic techniques like magnetocardiography for heart conditions and magnetoencephalography for brain disorders.
Since our organs function using precisely controlled weak magnetic fields, exposure to much stronger artificial EMF from technology raises questions about potential interference with these delicate natural biological processes and normal organ function.
This early biomagnetic research led to advanced diagnostic tools including magnetocardiography for detecting heart problems, magnetoencephalography for brain imaging, and other medical techniques that measure the body's natural electromagnetic signatures for disease detection.