Stefanics G et al. · 2007
Researchers exposed 30 healthy young adults to 10 minutes of 900 MHz radiation from a Nokia cell phone and measured their auditory brainstem response (ABR), which tracks how sound signals travel from the ear to the brain. They found no immediate changes in ABR timing compared to sham exposure. This suggests short-term cell phone use doesn't immediately disrupt the basic hearing pathway in the brainstem.
Shirai T et al. · 2007
Researchers exposed young rats to cell phone-like radiation (1.95 GHz W-CDMA signals) for 2 years to see if it would promote brain tumor development in animals already given a cancer-causing chemical. The study found no significant increase in brain tumors from the radiation exposure at levels of 0.67 and 2.0 W/kg SAR. This suggests that chronic exposure to this type of cell phone radiation does not accelerate brain tumor formation in this animal model.
Schmid G et al. · 2007
Researchers created a detailed computer model of the human inner and middle ear to measure how much radiofrequency energy is absorbed from cell phones held near the head. They found that typical mobile phones deposit extremely small amounts of energy in ear structures - less than 166 microwatts even at the highest frequency tested. The study concluded that cell phone radiation is unlikely to cause temperature-related damage to hearing organs.
Schmid G et al. · 2007
Researchers measured how much radiofrequency energy from cell phones actually reaches the pineal gland, a small brain structure that produces melatonin and regulates sleep cycles. Using tissue samples from 20 human pineal glands and computer modeling, they found that even when a phone operates at maximum power next to your ear, only tiny amounts of RF energy (11 microwatts) are absorbed by this deep brain structure. The scientists concluded that cell phone radiation is unlikely to cause temperature-related effects in the pineal gland.
Preece AW, Georgiou AG, Dunn EJ, Farrow S · 2007
Researchers studied residents living near powerful military radio transmitters in Cyprus to investigate health complaints. They found that people living in exposed villages reported 2.7 to 3.7 times more headaches, migraines, and dizziness compared to unexposed residents, but no increase in cancer or birth defects. The researchers suggested these symptoms were more likely caused by noise from military aircraft or psychological stress from seeing the antennas rather than the radio waves themselves.
Platano D et al. · 2007
Italian researchers exposed rat brain cells to 900 MHz radiofrequency radiation (the same frequency used by GSM cell phones) for short periods to see if it affected calcium channels, which are crucial for nerve cell communication. They found no changes in how calcium moved through these channels, even at radiation levels of 2 W/kg. This suggests that brief cell phone-level exposures 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 radiofrequency radiation for 15 minutes and measured their brain waves (EEG patterns) to see if the exposure affected brain activity. They found no changes in brain wave patterns from either pulsed or continuous RF exposure. This study failed to replicate earlier research that had found brain wave changes, possibly because this study used more realistic exposure levels that better match actual phone use.
Parazzini M et al. · 2007
European researchers tested whether 10 minutes of GSM cell phone exposure affects hearing in healthy young adults. They used comprehensive hearing tests including threshold levels and inner ear function measurements, comparing real phone exposure to fake exposure in a double-blind study. The results showed no detectable changes to any aspect of hearing function from the electromagnetic field exposure.
Parazzini M et al. · 2007
Italian researchers exposed 26 healthy young adults to cell phone radiation at 900 MHz (2 watts) while measuring heart rate variability, which reflects how well the autonomic nervous system regulates heart rhythm. The study found no statistically significant effects on heart rate patterns during either rest or physical stress, though some minor changes were detected in a few measurements. This suggests that short-term cell phone exposure at typical power levels doesn't meaningfully disrupt the body's automatic control of heart function.
Oftedal G, Straume A, Johnsson A, Stovner L · 2007
Researchers tested 17 people who claimed mobile phones caused their headaches by exposing them to real phone radiation and fake radiation without telling them which was which. The participants actually reported slightly more pain during the fake exposures than the real ones, and their heart rate and blood pressure didn't change based on whether they received real or fake radiation. This suggests mobile phone headaches are likely a nocebo effect - where expecting negative effects can actually cause symptoms even without real exposure.
Masuda H et al. · 2007
Researchers exposed rats to cell phone frequency radiation (1,439 MHz) for 10 minutes at three different power levels to see if it affected blood flow and the blood-brain barrier in their brains. They found no changes in any of the brain circulation measurements, including blood vessel size, blood flow speed, and whether the protective blood-brain barrier became more permeable. This suggests that short-term exposure to this type of radiofrequency radiation did not disrupt normal brain blood circulation.
Masuda H et al. · 2007
Researchers exposed rats' heads to cell phone-level radiation (1439 MHz) for one hour daily over four weeks to study effects on brain blood vessels. They found no changes in blood-brain barrier function, immune cell behavior, or blood flow in the brain. This suggests that this level of radiofrequency exposure may not disrupt the brain's delicate blood vessel system.
Klaeboe L, Blaasaas KG, Tynes T. · 2007
Norwegian researchers studied 541 brain tumor patients and 358 healthy controls to see if mobile phone use increased risk of brain tumors (gliomas, meningiomas, and acoustic neuromas). They found that regular mobile phone users actually had lower odds of developing these tumors compared to non-users, with no increasing risk even after 6+ years of use. This suggests mobile phones don't increase brain tumor risk, at least for the exposure levels and time periods studied.
Kan P, Simonsen SE, Lyon JL, Kestle JR. · 2007
Researchers analyzed nine case-control studies involving over 17,000 people to examine whether cell phone use increases brain tumor risk. They found no overall increased risk for typical users, but discovered a 25% higher risk among people who used cell phones for 10 years or longer. This suggests that while short-term use appears relatively safe, long-term exposure may pose health concerns that require further investigation.
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 (0.25 W/kg SAR) to see if it would cause cell death (apoptosis). Using three different testing methods, they found no increase in neuron death compared to unexposed control cells. This suggests that short-term cell phone radiation exposure may not directly kill brain cells under these laboratory conditions.
Irlenbusch L et al. · 2007
Researchers exposed 33 people to GSM mobile phone signals near their eyes to test whether radiofrequency radiation affects visual sensitivity (the ability to detect light differences). Using exposure levels similar to holding a phone close to your face, they found no measurable changes in visual discrimination abilities during 30-minute exposure sessions. This suggests that typical mobile phone use doesn't immediately impair basic visual function.
Inomata-Terada S et al. · 2007
Japanese researchers tested whether 30 minutes of cell phone radiation affects brain motor control by measuring electrical signals in the motor cortex (the brain region that controls movement) before and after phone exposure in 10 healthy volunteers and 2 multiple sclerosis patients. They found no changes in brain activity or motor function after phone exposure compared to fake exposure. The study suggests short-term cell phone use doesn't immediately impair the brain's ability to control muscle movement.
Haarala C et al. · 2007
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.
Fritzer G et al. · 2007
German researchers exposed 10 healthy young men to radiofrequency electromagnetic fields (similar to cell phone radiation) for six consecutive nights while monitoring their sleep patterns and cognitive performance. The study found no significant effects on sleep quality, brain wave patterns during sleep, or mental function tests. This suggests that short-term RF exposure at the levels tested does not disrupt sleep or thinking abilities in healthy individuals.
Cinel C, Boldini A, Russo R, Fox E. · 2007
Researchers tested whether cell phone radiation affects how well people can detect the order of sounds they hear. They exposed 168 participants to either real cell phone signals (GSM) or fake signals while performing an auditory task, testing both sides of the head. The study found no significant difference in performance between real and fake exposure, suggesting that short-term cell phone radiation doesn't impair this type of hearing ability.
Canseven AG, Keskil ZA, Keskil S, Seyhan N. · 2007
Researchers tested whether 50 Hz magnetic fields (the type from power lines) could affect seizures in mice, either making them better or worse. They exposed mice to magnetic fields before and after giving them a seizure-inducing drug, measuring how quickly seizures started and how long they lasted. The magnetic field exposure had no effect on seizures whatsoever, suggesting these fields don't influence brain seizure activity at the levels tested.
Glover PM, Eldeghaidy S, Mistry TR, Gowland PA. · 2007
Researchers exposed seven people to strong pulsed magnetic fields (similar to those in MRI machines) while measuring their brain's visual processing responses. They found no significant changes in how the brain processed visual information during or after the 10-minute exposure. This contradicts some earlier studies that found effects from different types of magnetic field exposure.
Canseven AG, Keskil ZA, Keskil S, Seyhan N. · 2007
Researchers exposed mice to 50 Hz magnetic fields (the same frequency as power lines) before and after inducing seizures with a chemical drug, to see if the magnetic field exposure would affect seizure activity. They found no changes in seizure timing, duration, or death rates, suggesting that this type of magnetic field exposure doesn't influence seizure disorders. This challenges any potential therapeutic use of magnetic fields for epilepsy treatment.
Terao Y et al. · 2007
Researchers tested whether 30 minutes of mobile phone exposure affects eye movement control (saccades) in 10 healthy adults. They measured various types of rapid eye movements before and after exposure to 800 MHz radiation at 0.054 W/kg SAR. The study found no significant changes in eye movement performance, suggesting short-term mobile phone use doesn't impair this aspect of brain function.
Stefanics G et al. · 2007
Researchers tested whether 10 minutes of cell phone radiation affects how quickly the brain processes sound by measuring auditory brainstem responses (electrical signals from the hearing pathway to the brain) in 30 healthy young adults. They found no measurable changes in brain response timing after exposure to 900 MHz radiation from a Nokia phone at typical usage levels. This suggests short-term phone calls don't immediately disrupt the brain's basic hearing functions.
