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Brain & Nervous System

Pulsed and continuous wave mobile phone exposure over left versus right hemisphere: Effects on human cognitive function.

No Effects Found

Haarala C, Takio F, Rintee T, Laine M, Koivisto M, Revonsuo A, Hamalainen H. · 2007

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Mobile phone radiation at typical call levels showed no immediate effects on cognitive performance in healthy men during brief exposure periods.

Plain English Summary

Summary written for general audiences

Finnish researchers exposed 36 healthy men to mobile phone radiation at two different power levels (continuous and pulsed waves) while they performed cognitive tests, comparing left-brain versus right-brain exposure. They found no measurable effects on thinking abilities, reaction times, or other brain functions from either type of phone radiation. This suggests that typical mobile phone use doesn't impair basic cognitive performance in healthy adults.

Study Details

The possible effects of continuous wave (CW) and pulse modulated (PM) electromagnetic field (EMF) on human cognition was studied in 36 healthy male subjects.

They performed cognitive tasks while exposed to CW, PM, and sham EMF. The subjects performed the sam...

An additional control group of 16 healthy male volunteers performed the same tasks without any expos...

Cite This Study
Haarala C, Takio F, Rintee T, Laine M, Koivisto M, Revonsuo A, Hamalainen H. (2007). Pulsed and continuous wave mobile phone exposure over left versus right hemisphere: Effects on human cognitive function. Bioelectromagnetics.28(4):289-295. 2007.
Show BibTeX
@article{c_2007_pulsed_and_continuous_wave_3060,
  author = {Haarala C and Takio F and Rintee T and Laine M and Koivisto M and Revonsuo A and Hamalainen H.},
  title = {Pulsed and continuous wave mobile phone exposure over left versus right hemisphere: Effects on human cognitive function.},
  year = {2007},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/17203481/},
}
PubMed: 17203481

Cited By (74 papers)

View all 74 citing papers on Semantic Scholar

Quick Questions About This Study

Finnish researchers found no difference between pulsed and continuous wave mobile phone radiation on cognitive performance. Both exposure types showed identical effects on thinking abilities, reaction times, and brain functions in 36 healthy men during cognitive testing.
A 2007 study found no cognitive differences when mobile phone radiation was directed at the left versus right brain hemisphere. Participants showed identical performance on cognitive tests regardless of which side of their brain received the radiation exposure.
Research with 36 healthy men found mobile phone radiation had no measurable impact on reaction times or mental processing speed. Participants performed cognitive tests identically whether exposed to phone radiation or in control conditions without any exposure equipment.
Researchers used a control group of 16 men who performed the same cognitive tests without any exposure equipment. They found no performance differences, confirming that the mere presence of mobile phone testing equipment doesn't impact cognitive function.
A controlled study of 36 healthy men found that typical mobile phone radiation exposure produces no discernible effects on basic cognitive functions as measured by behavioral tests, including thinking abilities and brain performance measures.