Platano D et al. · 2007
Italian researchers exposed rat brain cells to 900 MHz radiofrequency radiation (the same frequency used by GSM cell phones) to see if it affected calcium channels, which are crucial for brain cell communication. After exposing the cells to radiation at 2 W/kg for short periods, they found no changes in how calcium moved through these channels. This suggests that brief exposure to cell phone-level radiation may not immediately disrupt this particular aspect of brain cell function.
Perentos N, Croft RJ, McKenzie RJ, Cvetkovic D, Cosic I · 2007
Researchers exposed 12 people to mobile phone-like radio frequency radiation for 15 minutes to see if it changed their brain wave patterns (EEG). Unlike some previous studies, they found no changes in brain activity from either pulsed or continuous RF exposure. The researchers used a more realistic exposure setup that better mimicked actual phone use.
Krause CM, Pesonen M, Haarala Björnberg C, Hämäläinen H. · 2007
Finnish researchers exposed 72 men to 902 MHz mobile phone radiation while they performed memory tasks, measuring brain wave patterns through EEG. The study found only modest, inconsistent effects on brain oscillations in the alpha frequency range, with no impact on actual memory performance. The researchers concluded that any brain wave changes from phone radiation appear to be subtle, variable, and difficult to replicate consistently.
Joubert V, Leveque P, Cueille M, Bourthoumieu S, Yardin C. · 2007
French researchers exposed rat brain neurons to cell phone radiation (900 MHz GSM) for 24 hours at levels similar to phone use, then tested whether the radiation caused brain cells to die through a process called apoptosis. Using three different measurement methods, they found no increase in cell death compared to unexposed neurons. This suggests that brief cell phone radiation exposure may not directly damage brain cells in the way some scientists have theorized.
Irlenbusch L et al. · 2007
German researchers exposed 33 people to cell phone radiation at 902.4 MHz for 30 minutes to see if it affected their ability to detect light (visual discrimination threshold). They found no statistically significant changes in visual sensitivity between real exposure and fake exposure sessions. This suggests that brief GSM radiation exposure at typical power levels doesn't immediately impair basic visual function.
Inomata-Terada S et al. · 2007
Researchers exposed 10 healthy volunteers and 2 multiple sclerosis patients to mobile phone radiation for 30 minutes, then measured brain activity in the motor cortex (the brain region controlling movement) using magnetic stimulation. They found no changes in brain function or nerve signal transmission after the exposure compared to fake exposure sessions. The study suggests that short-term mobile phone use doesn't immediately impair motor cortex function, though the small sample size limits the ability to detect subtle effects.
Haarala C et al. · 2007
Finnish researchers tested whether mobile phone radiation affects thinking skills by having 36 men perform cognitive tasks while exposed to different types of phone signals on either the left or right side of their heads. They found no measurable differences in mental performance between real phone radiation exposure and fake exposure, regardless of which side of the head was exposed. The study suggests that typical mobile phone use doesn't impair basic cognitive functions like memory or attention in healthy adults.
Fritzer G et al. · 2007
German researchers exposed 10 healthy young men to pulsed radiofrequency electromagnetic fields during sleep for six consecutive nights, measuring both sleep quality and cognitive performance. They found no significant effects on sleep patterns, brain wave activity, or mental function compared to baseline measurements. This suggests that short-term RF exposure during sleep may not immediately disrupt these biological processes in healthy adults.
Cinel C, Boldini A, Russo R, Fox E · 2007
Researchers tested whether 40 minutes of mobile phone radiation affects hearing ability by having 168 people perform an auditory task while exposed to phone signals at two different power levels. The study found no significant changes in hearing performance during radiation exposure compared to sham (fake) exposure. This suggests that short-term mobile phone use doesn't impair basic auditory processing abilities.
Arns M, Van Luijtelaar G, Sumich A, Hamilton R, Gordon E · 2007
Researchers analyzed brain activity patterns in 300 people based on their mobile phone usage frequency, measuring brain waves and cognitive function. They found subtle slowing of brain activity in frequent phone users, though these changes remained within normal ranges. The study also showed that heavy phone users had better executive function, possibly due to practicing focused attention during calls in distracting environments.
Zhao TY, Zou SP, Knapp PE · 2007
Researchers exposed brain cells (neurons and astrocytes) to radiation from a working GSM cell phone for just 2 hours and found that genes involved in cell death pathways became more active. The effect occurred even when the phone was on standby mode, and neurons appeared more sensitive to the radiation than astrocytes (support cells in the brain). This suggests that even brief cell phone exposure can trigger cellular stress responses in brain tissue.
Wilén J, Wiklund U, Hörnsten R, Sandström M. · 2007
Researchers studied 35 workers who operated radiofrequency plastic sealing machines and compared their heart rhythms to 37 control subjects. They found that RF-exposed workers had altered heart rate patterns during nighttime, including lower heart rates and increased heart rate variability, suggesting changes to their nervous system's control of heart function. These changes appear to represent the body's adaptation to chronic low-level thermal exposure from the RF equipment.
Virtanen H, Keshvari J, Lappalainen R. · 2007
Researchers examined how common metallic implants in the head (like skull plates, bone fixtures, and earrings) affect radiation absorption when exposed to cell phone frequencies. They found that under certain conditions, these metallic implants can significantly increase the amount of electromagnetic energy absorbed by nearby tissues. This matters because millions of people have metallic dental work, surgical implants, or jewelry that could potentially concentrate cell phone radiation in their heads.
Vecchio F et al. · 2007
Italian researchers exposed 10 people to cell phone radiation for 45 minutes while measuring their brain waves with EEG technology. They found that the radiation altered how the left and right sides of the brain communicate with each other, specifically disrupting the synchronization of alpha brain waves that are important for information processing. This suggests that cell phone emissions don't just affect individual brain cells, but can interfere with the coordinated electrical activity between different brain regions.
Roosli M, Michel G, Kuehni CE, Spoerri A · 2007
Swiss researchers analyzed brain tumor death rates from 1969 to 2002 to see if mobile phone introduction in 1987 led to increased brain cancer deaths. They found that brain tumor mortality rates remained stable after mobile phones were introduced, with no increase in younger age groups who used phones most frequently. However, the study acknowledges it cannot detect small risks or effects that take decades to develop.
Peyman A, Holden SJ, Watts S, Perrott R, Gabriel C · 2007
Researchers measured how microwave radiation (50 MHz to 20 GHz) affects the electrical properties of brain and spinal cord tissues in pigs. They found that white matter and spinal cord tissues showed significant changes with age, while gray matter remained stable. This matters because understanding how different brain tissues respond to microwave frequencies helps us better predict potential health effects from wireless devices.
Landgrebe M et al. · 2007
German researchers used brain stimulation techniques to measure cortical excitability in 23 people who reported electromagnetic sensitivity, comparing them to 49 healthy controls. They found that electromagnetically sensitive individuals showed measurably different brain activity patterns, specifically reduced intracortical facilitation (a type of brain cell communication). This suggests that people reporting electromagnetic sensitivity may have genuine neurological differences that could explain their symptoms.
Lahkola A et al. · 2007
Researchers studied 1,522 brain cancer patients and 3,301 healthy people across five European countries to see if mobile phone use increases glioma risk. Overall, they found no increased cancer risk from regular phone use, but discovered a 39% higher risk when people used phones for more than 10 years on the same side of their head where the tumor developed. This suggests that long-term, localized exposure to the brain may pose risks that deserve further investigation.
Krause CM, Pesonen M, Haarala Bjornberg C, Hamalainen H. · 2007
Finnish researchers exposed 72 men to cell phone radiation at 902 MHz while they performed memory tasks, measuring brain wave activity through EEG recordings. The study found that phone radiation caused subtle changes in brain oscillations (electrical activity patterns) in the alpha frequency range, though these effects were inconsistent and didn't affect actual task performance. This adds to growing evidence that cell phone radiation can influence brain activity, even when users don't notice any immediate behavioral changes.
Hours M et al. · 2007
French researchers studied 596 brain tumor patients and matched controls to investigate whether cell phone use increases cancer risk. They found no statistically significant increased risk for gliomas, meningiomas, or acoustic neuromas among regular cell phone users. However, the heaviest users showed a concerning trend toward higher glioma risk, though the study lacked sufficient statistical power to draw definitive conclusions.
Hardell LO et al. · 2007
Researchers analyzed 16 studies to examine brain tumor risk in people who used cell phones for 10 years or longer. They found that long-term users had double the risk of developing acoustic neuroma (a benign brain tumor) and glioma (a malignant brain tumor), with the highest risk occurring on the same side of the head where people typically held their phone. This suggests that extended cell phone use over a decade may increase brain tumor risk.
Hansson Mild K, Hardell L, Carlberg M. · 2007
Swedish researchers analyzed two large studies involving thousands of people to examine whether mobile and cordless phone use increases brain tumor risk. They found that each year of phone use increased brain tumor risk by 8-11%, with the highest risks appearing after 10+ years of use, particularly for aggressive brain cancers called astrocytomas. The study also found that every 100 hours of analog phone use increased acoustic neuroma (a type of brain tumor) risk by 5%.
Ha M, Im H, Lee M, Kim HJ, Kim BC, Gimm YM, Pack JK. · 2007
Researchers in South Korea studied nearly 6,000 children to examine whether living near AM radio transmitters increases cancer risk. They found that children living within 2 kilometers of high-power AM radio towers had more than double the risk of developing leukemia compared to children living more than 20 kilometers away. This suggests that radio frequency radiation from broadcasting towers may contribute to childhood blood cancers.
Barcal J, Vozeh F. · 2007
Researchers measured brain activity in mice while exposing them to 900 MHz radiofrequency radiation (the same frequency used by cell phones). They found that this exposure caused measurable changes in brain wave patterns in both the cortex and hippocampus - key brain regions involved in thinking and memory. The changes were most pronounced in healthy mice, suggesting that cell phone-frequency radiation can directly alter normal brain function.
Arns M, Van Luijtelaar G, Sumich A, Hamilton R, Gordon E. · 2007
Researchers analyzed brain activity patterns in 300 people based on their mobile phone usage frequency and duration. They found that frequent phone users showed subtle slowing of brain waves (electrical activity in the brain) compared to light users, though these changes remained within normal ranges. Interestingly, heavy phone users also demonstrated better executive function skills, possibly from the mental training of making calls in distracting environments.
