Unknown authors · 2009
Researchers analyzed sleep data from nearly 370,000 U.S. adolescents between 2009-2015 and found teens became 16-17% more likely to sleep less than 7 hours per night. The study identified increased screen time from smartphones, social media, and electronic devices as the primary driver of this sleep decline. Unlike other activities that remained stable, new media use showed a clear dose-response relationship with sleep loss.
Unknown authors · 2009
Researchers exposed young female rats to 900 MHz cell phone radiation for one hour daily over 28 days and found significant loss of brain cells in the hippocampus, a region critical for memory and learning. The radiation levels (0.016-2 W/kg SAR) were comparable to what humans experience during cell phone use. This study adds to growing evidence that chronic EMF exposure during development may harm brain structure.
Unknown authors · 2009
Swedish researchers tested whether wireless phone use affects blood-brain barrier integrity by measuring S100B protein levels in 1,000 adults. The study found no significant association between mobile or cordless phone use and elevated S100B levels, suggesting wireless phones don't compromise the blood-brain barrier based on this biomarker.
Unknown authors · 2009
Swedish researchers tested whether mobile and cordless phone use affects blood-brain barrier integrity by measuring S100B protein levels in 1,000 adults. The study found no significant association between wireless phone use and elevated S100B levels, suggesting these devices don't appear to compromise the blood-brain barrier based on this biomarker.
Unknown authors · 2009
Researchers studied the electrical properties of neurons in the hearing center of young dog brains, finding three distinct cell types with different firing patterns and electrical characteristics. This foundational neuroscience research helps scientists understand how the auditory system processes sound signals and responds to electrical stimulation.
Unknown authors · 2009
Japanese researchers exposed 64 rats to 915 MHz electromagnetic fields (similar to older cell phone frequencies) for 2 hours at various power levels, then examined their brains 14 and 50 days later. They found no evidence of blood-brain barrier damage or neuronal harm, contradicting an earlier Swedish study that claimed such effects. This represents an important failure to replicate concerning brain damage claims.
Unknown authors · 2009
Italian researchers exposed developing brain cells to 900 MHz GSM cell phone radiation at 1 W/kg and found it reduced the growth of neural projections (neurites) that are critical for brain development. The study used both mouse brain cell lines and rat brain neurons, finding consistent effects across both models within 24-72 hours of exposure.
Unknown authors · 2009
Italian researchers exposed developing brain cells to 900 MHz cell phone radiation (the same frequency used by GSM networks) and found it significantly reduced the formation of neurites - the branch-like extensions that neurons use to communicate. The study used two different cell models and found the radiation interfered with normal brain cell development at power levels similar to cell phone use.
Unknown authors · 2009
Researchers exposed 10 healthy volunteers to 900 MHz GSM cell phone signals and measured brain electrical activity using event-related potentials. Both active phones and sham phones (with electromagnetic power dissipated internally) reduced brain arousal responses compared to phones that were completely off. This suggests cell phone exposure affects brain electrical activity and attention processing.
Unknown authors · 2009
Researchers exposed developing brain cells to cell phone radiation at 900 MHz (the same frequency used by GSM phones) and found it reduced the number of nerve branches that normally grow during brain development. The radiation also increased production of beta-thymosin, a protein that regulates cell structure, suggesting the EMF interfered with normal neural maturation processes.
Unknown authors · 2009
Air Force researchers exposed rats to 915 MHz radiofrequency radiation (similar to cell phone frequencies) for 30 minutes at various power levels to test whether it damages the blood-brain barrier. They found no detectable leakage of albumin proteins across this protective barrier, contradicting earlier studies from Lund University that reported blood-brain barrier damage from similar exposures.
Unknown authors · 2009
Japanese researchers exposed 64 rats to 915 MHz electromagnetic fields (similar to older cordless phones) for 2 hours at various power levels, then examined their brains 14 and 50 days later. They found no evidence of blood-brain barrier damage or neuron death, contradicting earlier Swedish research that claimed such effects occurred.
Unknown authors · 2009
This 2009 review examined how radiofrequency radiation from cell phone towers affects wildlife populations. The research found that continuous electromagnetic exposure from phone masts can reduce animals' natural defenses, harm reproduction, and cause behavioral avoidance in birds, bats, and other species. The study concluded that RF pollution represents a potential cause for declining animal populations near cell towers.
Unknown authors · 2009
Slovak researchers exposed newborn and elderly rats to 2.45 GHz pulsed electromagnetic fields (the same frequency as WiFi and microwave ovens) and found significant disruption to brain cell development. The study revealed that EMF exposure reduced the number of new brain cells forming in the rostral migratory stream, with effects varying by age and exposure duration. This suggests that developing brains may be particularly vulnerable to wireless radiation.
Unknown authors · 2009
This comprehensive review examined radiofrequency research from 2004-2007, analyzing studies on mobile phones, wireless networks, and RF health effects including cancer, neurological impacts, and biological changes. The authors concluded there was no clear evidence of adverse health effects from RF fields during this period, though they recommended continued research especially regarding children's mobile phone use.
Unknown authors · 2009
Air Force researchers exposed rats to 915 MHz radiofrequency radiation (similar to some cell phone frequencies) for 30 minutes at various power levels to test whether it damages the blood-brain barrier. They found no detectable leakage of albumin proteins across this critical protective barrier, contradicting earlier studies from Sweden's Lund University that reported such damage.
Unknown authors · 2009
Japanese researchers exposed 64 rats to 915 MHz electromagnetic fields (similar to older cell phones) for 2 hours at various power levels, then examined their brains 14 and 50 days later. They found no evidence of blood-brain barrier leakage or brain cell damage, contradicting an earlier Swedish study that reported such effects. This study suggests 915 MHz radiation may not damage the brain barrier as previously claimed.
Unknown authors · 2009
This comprehensive review examined how radiofrequency electromagnetic fields from mobile phones affect the human nervous system. While researchers found some minor changes in brain wave patterns (EEG) during GSM phone signal exposure, these changes were not linked to any health problems. Studies consistently showed no significant effects on hearing, balance, or cognitive performance in adults or children.
Schoemaker MJ, Swerdlow AJ · 2009
British researchers studied 291 people with pituitary tumors (small growths in a brain gland that regulates hormones) and 630 healthy controls to see if cell phone use increased tumor risk. They found no association between cell phone use and pituitary tumors, even among the heaviest users or those who had used phones for over 10 years. This suggests that cell phone radiation doesn't appear to cause this specific type of brain tumor.
Rağbetli MC, Aydinlioğlu A, Koyun N, Rağbetli C, Karayel M · 2009
Researchers exposed pregnant mice to mobile phone radiation throughout pregnancy and then examined brain cell counts in their offspring's hippocampus (the brain region crucial for memory and learning). They found no significant difference in the number of pyramidal cells between exposed and unexposed offspring. However, the study lacked important details about exposure levels and duration, making it difficult to assess how these findings relate to human mobile phone use.
Parazzini M et al. · 2009
European researchers exposed 134 healthy young adults to radiofrequency radiation from UMTS mobile phones for 20 minutes and tested their hearing immediately before and after exposure. The study found no measurable effects on hearing function, including hearing thresholds, inner ear responses, or brain processing of sound. This suggests that short-term exposure to cell phone radiation at typical usage levels doesn't immediately impact the auditory system.
Mizuno Y et al. · 2009
Japanese researchers used brain scans to study whether 30 minutes of exposure to 3G mobile phone radiation (W-CDMA at 1950 MHz) affects blood flow in the brain. Testing nine healthy men with PET scans before, during, and after phone exposure, they found no significant changes in regional brain blood flow compared to fake exposure. This suggests that 3G phone radiation at typical usage levels doesn't measurably alter blood circulation in the brain.
Marino AA, Carrubba S · 2009
Researchers analyzed 55 studies examining whether mobile phone radiation affects brain electrical activity measured by EEG. They found that 87% of these studies were funded by the wireless industry, and that both positive and negative studies had serious methodological flaws that prevented reliable conclusions. The authors argue that this systematic doubt about EMF effects was manufactured by industry funding rather than reflecting genuine scientific uncertainty.
Lipping T et al. · 2009
Researchers exposed eleven anesthetized pigs to mobile phone radiation at 890 MHz to test whether radiofrequency signals could trigger brain activity changes in a highly sensitive state. They found no correlation between RF exposure and brain wave patterns, though the animals experienced significant temperature increases (1.6°C) and elevated heart rates during the 10-minute exposures. This suggests that while RF radiation can cause heating effects, it may not directly stimulate brain activity even under conditions of heightened neural sensitivity.
Kwon MS et al. · 2009
Researchers tested whether cell phone radiation affects the brain's ability to automatically detect changes in sounds by measuring brain waves in 17 healthy adults while a GSM phone was placed next to their ear. They found no differences in brain responses whether the phone was on or off, suggesting that acute exposure to cell phone radiation doesn't impair this basic auditory processing function. This study adds to research examining how electromagnetic fields might affect brain function during everyday phone use.
