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[Forming of memory (imprinting) in chicks after prior low-level exposure to electromagnetic fields].

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Grigor'ev IuG, Stepanov VS · 1998

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EMF exposure as low as 0.4 mW/cm2 during embryonic development disrupted memory formation in chicks, with effects persisting after birth.

Plain English Summary

Summary written for general audiences

Russian researchers exposed developing chick embryos to electromagnetic fields at power densities between 0.4 and 10 mW/cm2 and found these exposures could alter memory formation (imprinting) processes in the brain. The study showed that EMF exposure during embryonic development left lasting changes in brain function that persisted after hatching. This suggests electromagnetic fields can interfere with critical brain development processes during vulnerable developmental periods.

Why This Matters

This 1998 Russian study reveals something particularly concerning about EMF exposure during development. The researchers found that relatively low-level electromagnetic fields could disrupt imprinting, the fundamental learning process that allows newborn animals to recognize and bond with their parents. What makes this especially significant is that the effects occurred at power densities starting at just 0.4 mW/cm2, which falls within ranges that developing organisms might encounter from various wireless technologies. The fact that these brain changes persisted after birth suggests EMF exposure during critical developmental windows may have lasting neurological consequences. While this study used chick embryos, it adds to a growing body of research indicating that the developing brain may be particularly vulnerable to electromagnetic interference, raising important questions about exposure during human pregnancy and early childhood.

Exposure Details

Power Density
0.4 to 10 µW/m²

Exposure Context

This study used 0.4 to 10 µW/m² for radio frequency:

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.4 to 10 µW/m²Extreme Concern - 1,000 uW/m2FCC Limit - 10M uW/m2Effects observed in the Slight Concern rangeFCC limit is 25,000,000x higher than this level

Study Details

The aim of this study is to investigate Forming of memory (imprinting) in chicks after prior low-level exposure to electromagnetic fields

EMF of power density from 0.4 to 10 mW/cm2 can influence forming the memory (imprinting). Showed the...

Cite This Study
Grigor'ev IuG, Stepanov VS (1998). [Forming of memory (imprinting) in chicks after prior low-level exposure to electromagnetic fields]. Radiats Biol Radioecol 38(2):223-231, 1998.
Show BibTeX
@article{iug_1998_forming_of_memory_imprinting_1003,
  author = {Grigor'ev IuG and Stepanov VS},
  title = {[Forming of memory (imprinting) in chicks after prior low-level exposure to electromagnetic fields].},
  year = {1998},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/9633625/},
}
PubMed: 9633625

Cited By (3 papers)

Quick Questions About This Study

Yes, Russian researchers found that EMF exposure at 0.4 to 10 mW/cm2 during chick embryonic development altered memory formation (imprinting) processes. These brain changes persisted after hatching, suggesting electromagnetic fields can interfere with critical brain development during vulnerable periods.
Research on chick embryos shows EMF exposure between 0.4-10 mW/cm2 can influence imprinting behavior. The 1998 study found that electromagnetic fields during embryonic development created lasting changes in brain function that affected memory formation after the chicks hatched.
Studies show EMF power densities as low as 0.4 mW/cm2 can affect developing brain tissue. Research on chick embryos found that exposure between 0.4-10 mW/cm2 during development altered memory formation processes and left permanent changes in brain function.
Yes, research demonstrates prenatal EMF exposure can cause permanent brain changes. A study on chick embryos found that EMF exposure during development created lasting alterations in memory formation that persisted after birth, indicating permanent modifications to brain function.
EMF exposure during embryonic development in birds can alter critical brain processes like memory formation. Research found that power densities of 0.4-10 mW/cm2 during the embryonic period modified imprinting mechanisms, with these brain changes remaining detectable after hatching.