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Effects of Electromagnetic Radiation from Smartphones on Learning Ability and Hippocampal Progenitor Cell Proliferation in Mice.

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Choi Y-J, Choi Y-S. · 2016

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Smartphone radiation caused lasting hyperactivity and brain cell activation in mice weeks after exposure ended, suggesting delayed neurological effects.

Plain English Summary

Summary written for general audiences

Researchers exposed mice to smartphone electromagnetic radiation for 9-11 weeks and tested their learning ability and brain cell development. While the radiation didn't affect memory or cell growth, it did activate astrocytes (brain support cells) and caused hyperactivity-like behavior that persisted weeks after exposure ended. This suggests smartphone EMF can trigger lasting changes in brain function even without obvious cognitive impairment.

Why This Matters

This study reveals something important that standard safety testing misses: EMF effects that don't show up immediately but persist long after exposure ends. The fact that these mice developed hyperactivity-like behavior weeks after radiation stopped suggests smartphone EMF can trigger lasting neurological changes. The astrocyte activation is particularly significant because these brain cells play crucial roles in protecting neurons and maintaining brain function. When they become overactive, it often signals underlying stress or inflammation in the brain. What makes this research especially relevant is that the exposure duration (9-11 weeks) roughly parallels how long many people have been heavy smartphone users. While the study doesn't specify exact radiation levels, the delayed behavioral effects suggest we may be missing important long-term consequences by focusing only on immediate, obvious symptoms.

Exposure Information

Specific exposure levels were not quantified in this study. Duration: 9 weeks and 11 weeks

Study Details

In this study, we intended to elucidate the effect of electromagnetic radiation from smartphones on spatial working memory and progenitor cell proliferation in the hippocampus.

Both male and female mice were randomly separated into two groups (radiated and control) and the rad...

When spatial working memory on a Y maze was examined in the 9(th) week, there was no significant dif...

These data indicate that although chronic electromagnetic radiation does not affect spatial working memory and hippocampal progenitor cell proliferation it can mediate astrocyte activation in the hippocampus and delayed hyperactivity-like behavior.

Cite This Study
Choi Y-J, Choi Y-S. (2016). Effects of Electromagnetic Radiation from Smartphones on Learning Ability and Hippocampal Progenitor Cell Proliferation in Mice. Osong Public Health and Research Perspectives. 7(1):12-17. February 2016. doi:10.1016/j.phrp.2015.12.009.
Show BibTeX
@article{y_j_2016_effects_of_electromagnetic_radiation_1982,
  author = {Choi Y-J and Choi Y-S.},
  title = {Effects of Electromagnetic Radiation from Smartphones on Learning Ability and Hippocampal Progenitor Cell Proliferation in Mice.},
  year = {2016},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/26981337/},
}
PubMed: 26981337

Cited By (23 papers)

Quick Questions About This Study

Yes, a 2016 study found that mice exposed to smartphone EMF for 11 weeks showed increased hyperactivity-like behavior four weeks after exposure ended. The mice entered maze arms significantly more often than unexposed animals, suggesting lasting behavioral changes from chronic smartphone radiation exposure.
Yes, researchers found that chronic smartphone radiation activated astrocytes (brain support cells) in the hippocampus without affecting spatial working memory. This astrocyte activation occurred despite no measurable impact on learning ability or memory performance in exposed mice.
No, the study found that 9-11 weeks of smartphone EMF exposure did not significantly affect hippocampal progenitor cell proliferation in mice. Despite causing other brain changes like astrocyte activation, the radiation did not impact the growth of new brain cells.
Smartphone radiation can trigger astrocyte activation (a form of brain inflammation) without affecting memory performance. The 2016 study suggests that brain support cells respond to EMF exposure even when cognitive functions like spatial working memory remain intact.
Brain effects from smartphone radiation can persist at least four weeks after exposure ends. Mice showed hyperactivity-like behavior a month after stopping 11 weeks of EMF exposure, indicating that chronic smartphone radiation may cause lasting changes in brain function.