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Spatial memory performance of Wistar rats exposed to mobile phone.

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Narayanan SN, Kumar RS, Potu BK, Nayak S, Mailankot M · 2009

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Mobile phone radiation impaired rats' spatial memory by 300%, suggesting everyday phone use may affect learning and navigation abilities.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to mobile phone signals (50 missed calls daily for 4 weeks) and then tested their ability to navigate a water maze to find a hidden platform. Phone-exposed rats took 3 times longer to find the target area and spent half as much time in the correct location compared to unexposed rats. This suggests mobile phone radiation may impair spatial memory and learning ability.

Why This Matters

This study adds to a growing body of research showing that radiofrequency radiation can affect brain function, specifically the cognitive processes involved in learning and memory. The exposure protocol (50 missed calls per day) may seem artificial, but it represents the kind of intermittent RF exposure many people experience from their phones throughout the day. What makes this research particularly relevant is that spatial memory and navigation are fundamental cognitive functions we rely on daily. The science demonstrates that even without the phone ringing or vibrating against the body, the electromagnetic fields alone were sufficient to impair the rats' ability to learn and remember spatial information. While we can't directly extrapolate animal studies to humans, this research contributes to the evidence that our devices may be affecting brain function in ways we're only beginning to understand.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1.80 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1.80 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 900–1,800 MHz Mobile phone Duration: 50 missed call/day, 4 wk

Study Details

We tested the effects of mobile phone exposure on spatial memory performance.

Male Wistar rats (10-12 weeks old) were exposed to 50 missed calls/day for 4 weeks from a GSM (900/1...

Mobile phone exBoth phone exposed and control animals showed a significant decrease in escape time w...

Mobile phone exposure affected the acquisition of learned responses in Wistar rats. This in turn points to the poor spatial navigation and the object place configurations of the phone-exposed animals.

Cite This Study
Narayanan SN, Kumar RS, Potu BK, Nayak S, Mailankot M (2009). Spatial memory performance of Wistar rats exposed to mobile phone. Clinics (Sao Paulo). 64(3):231-234, 2009.
Show BibTeX
@article{sn_2009_spatial_memory_performance_of_1518,
  author = {Narayanan SN and Kumar RS and Potu BK and Nayak S and Mailankot M},
  title = {Spatial memory performance of Wistar rats exposed to mobile phone.},
  year = {2009},
  
  url = {https://www.scielo.br/scielo.php?pid=S1807-59322009000300014&script=sci_abstract&tlng=pt},
}

Quick Questions About This Study

A 2009 study found that rats exposed to 50 missed calls daily for 4 weeks showed severely impaired spatial memory. The phone-exposed rats took 3 times longer to navigate a water maze and spent half as much time in the target area compared to unexposed rats.
Research on Wistar rats exposed to 900-1800 MHz mobile phone signals showed significantly impaired learning ability. The exposed animals had poor acquisition of learned responses and struggled with spatial navigation tasks compared to control groups, suggesting learning deficits.
According to a 2009 study, just 4 weeks of daily mobile phone exposure (50 missed calls per day) was sufficient to significantly impair spatial memory performance in rats, demonstrating that memory effects can occur relatively quickly.
Rats exposed to mobile phone radiation showed dramatically worse performance in water maze navigation tests. They took approximately 3 times longer to find hidden platforms and spent roughly 2 times less time in correct target areas than unexposed control rats.
Yes, a study by Narayanan and colleagues found that mobile phone exposure affected rats' ability to understand object place configurations. The phone-exposed animals showed poor spatial navigation skills and difficulty with location-based learning tasks compared to controls.