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Cognitive impairment in rats after long-term exposure to GSM-900 mobile phone radiation

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Authors not listed · 2007

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Long-term GSM cell phone radiation exposure impaired rats' memory for objects and timing after just 2 hours weekly.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to GSM-900 cell phone radiation for 2 hours weekly over 55 weeks and tested their memory abilities. The exposed rats showed significantly impaired memory for objects and when they were presented, while their spatial memory remained normal. This suggests that long-term cell phone radiation exposure may damage specific types of memory function.

Why This Matters

This study provides compelling evidence that the type of radiation emitted by GSM cell phones can impair memory function after prolonged exposure. What makes this particularly relevant is the exposure pattern: just 2 hours per week over 55 weeks was enough to produce measurable cognitive deficits. The reality is that most people today use their phones far more than 2 hours weekly, often holding them directly against their heads during calls. The researchers used SAR levels of 0.6 and 60 mW/kg, which span the range of typical cell phone emissions. The finding that temporal memory was specifically affected while spatial memory remained intact suggests these aren't generalized health effects but targeted impacts on brain function. This adds to a growing body of research indicating that the wireless radiation we're exposed to daily may be subtly but significantly affecting our cognitive abilities.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (2007). Cognitive impairment in rats after long-term exposure to GSM-900 mobile phone radiation.
Show BibTeX
@article{cognitive_impairment_in_rats_after_long_term_exposure_to_gsm_900_mobile_phone_radiation_ce956,
  author = {Unknown},
  title = {Cognitive impairment in rats after long-term exposure to GSM-900 mobile phone radiation},
  year = {2007},
  doi = {10.1002/bem.20386},
  
}

Quick Questions About This Study

Yes, rats exposed to GSM-900 radiation for 55 weeks showed significantly impaired memory for objects and their timing compared to unexposed controls. The effect was statistically significant with P = 0.02.
Just 2 hours of GSM-900 exposure per week for 55 weeks was sufficient to cause measurable memory impairment in rats, suggesting relatively low exposure levels can affect cognitive function.
GSM-900 exposure specifically impaired episodic-like memory, affecting rats' ability to remember objects and when they were presented. However, spatial memory for where objects were located remained unaffected.
Researchers used SAR levels of 0.6 and 60 mW/kg, which represent the range of typical cell phone emissions. Both exposure levels contributed to the observed memory impairments.
No, GSM-900 exposed rats showed normal exploratory behavior in open-field tests, indicating the cognitive effects were specific to memory function rather than general behavioral changes.