Kwon MS, Jääskeläinen SK, Toivo T, Hämäläinen H. · 2010
Researchers investigated the effects of a GSM mobile phone electromagnetic field on brainstem auditory processing. Auditory brainstem responses were recorded in 17 healthy young adults at baseline without a phone and then with a phone on the ear under EMF-off and EMF-on conditions. ABR waveforms showed no significant differences due to exposure.
Vrijheid M et al. · 2010
A birth cohort was established in Sabadell, Spain between 2004 and 2006. Mothers completed questions about cell phone use in week 32 of pregnancy (n = 587) and their children's neurodevelopment was tested at 14 months using the Bayley Scales of Infant Development (n = 530). We observed only small differences in neurodevelopment scores between the offspring of cell phone users and nonusers. Those of users had higher mental development scores and lower psychomotor development scores, which may be due to unmeasured confounding, and there was no trend with amount of cell phone use within users.
Thomas S et al. · 2010
The study included 236 adolescents who completed both examinations. Mobile phone ownership and weekly voice calls and SMS increased from baseline to follow-up. Participants with more voice calls and SMS at baseline showed smaller reductions in response times across computerized tasks. Increased voice calls and SMS over the year were associated with changes in response time on a simple reaction and a working memory task. No associations were found between mobile phone exposure and the Stroop test.
Kundi M. · 2010
Researchers identified 33 epidemiologic studies in the peer-reviewed literature, mostly 25 about brain tumors. Methodologic considerations revealed three important conditions for detecting increased risk are not met: no evidence-based exposure metric, observed duration of mobile phone use generally too low, and no evidence-based selection of end points among neoplasias due to lack of etiologic hypotheses. The overall evidence speaks in favor of an increased risk, but its magnitude cannot be assessed at present because of insufficient information on long-term use.
Khurana VG et al. · 2010
Researchers searched PubMed and identified 10 epidemiological studies on mobile phone base station health effects. Seven studies examined neurobehavioral effects and three studied cancer. Eight of the ten studies reported increased prevalence of adverse neurobehavioral symptoms or cancer in populations living within 500 meters of base stations. None of the studies reported exposures above international guidelines, suggesting guidelines may be inadequate.
Johansson A, Nordin S, Heiden M, Sandström M. · 2010
Researchers assessed symptoms and psychological measures in 45 people with mobile phone-related symptoms and 71 with electromagnetic hypersensitivity, compared with a population-based sample of 106 and a control group of 63 using self-report questionnaires. The electromagnetic hypersensitivity group reported more symptoms overall, both EMF-related and nonrelated; the mobile phone group reported more somatosensory symptoms and the electromagnetic hypersensitivity group more neurasthenic symptoms. In direct comparison the groups differed only on somatization and listlessness; compared with reference groups the MP group had higher exhaustion and depression but not anxiety, somatization, or stress, while the EHS group had higher levels of all conditions except stress.
Hutter HP et al. · 2010
Researchers enrolled 100 consecutive tinnitus patients and matched controls in a case-control study. Mobile phone use was assessed using the Interphone Study protocol and analyzed with conditional logistic regression adjusting for education and urban residence. Regular mobile phone use and cumulative hours were not significantly associated with tinnitus, but use for four years or more showed an odds ratio of 1.95.
Heinrich S, Thomas S, Heumann C, von Kries R, Radon K. · 2010
A population-based cross-sectional study in Germany from 2006 to 2008 generated 24-hour exposure profiles for 1484 children and 1508 adolescents using personal dosimeters. Acute symptoms were assessed twice daily with a symptom diary, and only a few statistically significant associations were found, including higher headache intensity in adolescents with highest morning exposure at noon and higher irritation and concentration problem intensities at bedtime. The authors observed that the few significant results were not consistent over the two time points, could not be confirmed in the top 10% highest exposure group, and concluded the associations likely occurred by chance.
Hardell L, Carlberg M, Hansson Mild K. · 2010
Researchers conducted a case-control study of deceased brain tumor cases aged 20-80 years diagnosed during 1997-2003, using two control groups of deceased individuals who died from other cancers or other diseases. Exposure was assessed via questionnaires sent to next-of-kin, with response rates of 75% for cases, 74% for cancer controls, and 60% for other-disease controls. Mobile phone use showed increased risk with >10 years latency (OR=2.4, 95% CI=1.4-4.1) and with >2,000 hours cumulative use (OR=3.4, 95% CI=1.6-7.1), while cordless phone use showed no clear association.
Danker-Hopfe H, Dorn H, Bornkessel C, Sauter C. · 2010
Researchers conducted a double-blind, sham-controlled, randomized cross-over study with 397 residents exposed to GSM base station signals and sham exposure at home for 12 nights. No significant differences in objective or subjective sleep measures were found between real and sham exposure conditions. During sham exposure nights, participants with concerns about health risks from base stations had significantly worse sleep efficiency, wake after sleep onset, and subjective sleep latency than those without concerns. The authors concluded that EMF from base stations did not affect sleep quality, but the presence of base stations themselves may negatively impact sleep.
Crespo-Valero P et al. · 2010
The methodology enhances dosimetry assessment using finite difference time domain simulations or compliance dosimetry measurements. Applications include detailed dosimetric analysis of brain exposure during cell phone use and improved design of exposure setups for human studies. A hierarchical labeling scheme mapped onto high-resolution human models automatically identifies over a thousand brain sites. Electromagnetic absorption can be extracted and interpreted for any brain region or combination of regions.
Colletti V et al. · 2010
Researchers exposed seven patients with Ménière's disease undergoing retrosigmoid vestibular neurectomy to a mobile phone placed over the craniotomy for 5 minutes. All patients showed a substantial decrease in amplitude and a significant increase in latency of cochlear nerve compound action potentials during the 5 minutes of exposure. The changes lasted for around 5 minutes after exposure ended.
Christ A, Gosselin MC, Christopoulou M, Kühn S, Kuster N. · 2010
Researchers compared absorption in cortex regions using MRI-based head phantoms of adults and children exposed to different mobile phone models. Locally induced fields in children were significantly higher (>3 dB) in brain subregions (cortex, hippocampus, hypothalamus) and the eye due to closer phone proximity. Bone marrow showed an even larger increase (>10 dB) due to its high conductivity. Pineal gland showed no increase as its distance to the phone does not change with age. The study confirmed no age-dependent changes in peak spatial SAR when averaged over the entire head.
Angelone LM, Bit-Babik G, Chou CK. · 2010
Researchers performed a finite-difference time-domain simulation of a human head model with EEG electrodes and leads exposed to RF sources at 915 MHz and 1748 MHz. Whole-head and peak 10-g average SAR changed by less than 20% with leads present, and peak SAR values remained below ICNIRP and IEEE limits. However, a volumetric assessment revealed a two-order-of-magnitude increase in single-voxel power absorption in the epidermis and a 40-fold increase in the brain when metallic leads were used with a 915 MHz mobile phone.
Vecchio F et al. · 2010
Researchers recorded eyes-closed resting EEG data from 16 healthy elderly subjects and 5 young subjects during GSM-on and GSM-off conditions lasting 45 minutes each. Spectral coherence measured inter-hemispheric synchronization across delta, theta, and alpha frequency bands. Elderly subjects showed a statistically significant increment of inter-hemispheric coherence of frontal and temporal alpha rhythms during the GSM condition compared to young subjects. The results suggest GSM-EMFs affect inter-hemispheric synchronization of alpha EEG rhythms as a function of physiological aging.
Thomas S, Heinrich S, von Kries R, Radon K · 2010
Researchers randomly selected 1,498 children and 1,524 adolescents from population registries in four Bavarian cities and measured their RF exposure over 24 hours with personal dosimeters. Mental health behaviour was assessed using the German version of the Strengths and Difficulties Questionnaire (SDQ). Measured exposure in the highest quartile was associated with overall behavioural problems in adolescents but not in children. Exposure was associated with conduct problems in both children and adolescents.
Panda NK, Jain R, Bakshi J, Munjal S. · 2010
Participants underwent a battery of audiologic investigations including pure-tone audiometry, tympanometry, distortion product otoacoustic emissions, auditory brain responses, and middle latency responses. There was no significant difference between users and controls for any of the audiologic parameters. However, trends for audiologic abnormalities were seen within users, with high-frequency loss and absent distortion product otoacoustic emissions observed with longer duration of use, excessive use, and age over 30 years. The researchers concluded that long-term and intensive mobile phone use may cause inner ear damage, but a larger sample size would be needed for definitive conclusions.
Narayanan SN et al. · 2010
Healthy male albino Wistar rats were exposed to RF-EMR by giving 50 missed calls per day for 4 weeks with a GSM mobile phone in vibratory mode in the cage. Passive avoidance behaviour was significantly affected in exposed rats, shown as shorter entrance latency to the dark compartment compared to control rats. Marked morphological changes were observed in the CA3 region of the hippocampus of exposed rats compared to control rats. Mobile phone RF-EMR exposure significantly altered passive avoidance behaviour and hippocampal morphology in rats.
Maganioti AE et al. · 2010
Researchers examined P600 waveform activation patterns using principal component analysis and repeated measures ANOVA to test for RF and gender dependence. Event-related potentials were recorded from thirty-nine healthy subjects (20 male and 19 female) during an auditory memory task in the presence and absence of RF similar to that emitted by mobile phones. Both PCA and ANOVA showed that P600 activation occurs early and intensely in posterior electrodes, less intensely in central electrodes, and later with reduced intensity in anterior electrodes. In the absence of RF, female subjects had significantly lower amplitudes at anterior electrodes and earlier latencies at central electrodes than males, but these gender differences disappeared during RF exposure.
Danker-Hopfe H, Dorn H, Bahr A, Anderer P, Sauter C. · 2010
Balmori A. · 2010
Researchers exposed eggs and tadpoles of the common frog (Rana temporaria) to electromagnetic radiation from mobile phone antennae located 140 meters away for two months, from the egg phase until an advanced tadpole phase. The exposed group of 70 tadpoles showed low coordination of movements, asynchronous growth, and 90% mortality. A control group of 70 tadpoles kept under the same conditions inside a Faraday cage showed normal movement coordination, synchronous development, and only 4.2% mortality. The researchers concluded that radiation from phone masts in a real situation may affect development and may cause an increase in mortality of exposed tadpoles.
Carrubba S, Frilot C 2nd, Chesson AL Jr, Marino AA · 2010
Researchers recorded EEGs from six standard locations in 20 volunteers to detect brain potentials triggered by a pulse of the type produced by mobile phones. Evoked potentials having the expected latency were found in 90% of the volunteers, as assessed using a nonlinear method of EEG analysis. Evoked potentials were not detected when the EEG was analyzed using time averaging. The possibility of systematic error was excluded by sham-exposure analyses.
Rağbetli MC et al. · 2010
Researchers investigated the effect of mobile phone exposure on Purkinje and granule neurons in the developing cerebellum. Pregnant Swiss albino mice were exposed to GSM mobile phone radiation at 890–915 MHz at 0.95 W/Kg specific absorption rate (SAR). The study found a significant decrease in the number of Purkinje cells and a tendency for granule cells to increase.
Söderqvist F, Hardell L, Carlberg M, Mild KH · 2010
Researchers proposed that transthyretin (TTR), a protein that sequesters amyloid-beta, might help explain findings related to radiofrequency exposure and Alzheimer's disease. In a provocation study on 41 persons exposed for 30 minutes to an 890-MHz GSM signal at 1.0 Watt/kg to the temporal area of the brain, serum TTR was found to be statistically significantly increased 60 minutes after exposure. In a cross-sectional study on 313 subjects, a statistically significantly positive association was found between serum TTR and time since first use of mobile phones and desktop cordless phones combined (P=0.03).
Imge EB, Kiliçoğlu B, Devrim E, Cetin R, Durak I · 2010
Forty female rats were divided into four groups: control, mobile phone, mobile phone plus vitamin C, and vitamin C alone. The mobile phone groups were exposed to a mobile phone signal (900 MHz), and vitamin C was administered orally for four weeks. Mobile phone exposure caused an inhibition in 5'-NT and CAT activities compared to the control group, while GSH-Px activity and MDA levels were reduced but not significantly. The researchers suggested that vitamin C may play a protective role against detrimental effects of mobile phone radiation in brain tissue.
