Effects of mobile phone emissions on human brain activity and sleep variables

Hamblin, Denise L.; Wood, Andrew W.

doi:10.1080/09553000210132298

Cited by 102 publications

(67 citation statements)

References 29 publications

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“…It is suggested to affect adolescent sleep by displacing good sleep hygiene practices, increasing physiological arousal and anxiety, and delaying circadian rhythms by suppressing melatonin secretion [71][72][73]. Mobile phone usage prior to sleep is shown to potentially modify sleep architecture [74,75]. Social opportunities and peer group influences are also touted to have an effect on adolescent sleep patterns [76], as the pressure to develop relationships during this phase of life is of particular pertinence [77].…”

Section: Environmental Factorsmentioning

confidence: 99%

The Somnolent Youth-Sleep and the Influence of Exercise: A Narrative Review

Suppiah

Chia²,

Walk³

2015

Sports

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Abstract:Sleep is crucial to the physiological and psychological development of youth. The implications of insufficient sleep on learning and school performance are well documented. However, adequate sleep often goes unmet due to a combination of biological, societal, and environmental factors, especially during adolescence. In the present review, the changes to adolescent sleep patterns, and its consequences on cognition and learning are briefly explored. We then review the empirical literature of the role of exercise in regulating adolescent sleep patterns, and its potential mechanisms.

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Section: Environmental Factorsmentioning

confidence: 99%

The Somnolent Youth-Sleep and the Influence of Exercise: A Narrative Review

Suppiah

Chia²,

Walk³

2015

Sports

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“…First, these studies provide insight into the mechanisms by which endogenous electric fields generated by the brain itself (e.g., delta, theta, gamma) could "feedback" unto the brain (Lutz et al, 2001, Parra andSchaefer et al, 2006). Second, these studies address concerns about human exposure to environmental electromagnetic fields (Hamblin, 2002;Jefferys et al, 2003). Last, they have practical applications in the design of low-intensity brain stimulation treatments for neurological diseases (Ghai et al, 2000;Francis et al, 2003;Webster et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Spike Timing Amplifies the Effect of Electric Fields on Neurons: Implications for Endogenous Field Effects

Radman¹,

Su²,

An³

et al. 2007

J. Neurosci.

259

229

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Despite compelling phenomenological evidence that small electric fields (Ͻ5 mV/mm) can affect brain function, a quantitative and experimentally verified theory is currently lacking. Here we demonstrate a novel mechanism by which the nonlinear properties of single neurons "amplify" the effect of small electric fields: when concurrent to suprathreshold synaptic input, small electric fields can have significant effects on spike timing. For low-frequency fields, our theory predicts a linear dependency of spike timing changes on field strength. For high-frequency fields (relative to the synaptic input), the theory predicts coherent firing, with mean firing phase and coherence each increasing monotonically with field strength. Importantly, in both cases, the effects of fields on spike timing are amplified with decreasing synaptic input slope and increased cell susceptibility (millivolt membrane polarization per field amplitude). We confirmed these predictions experimentally using CA1 hippocampal neurons in vitro exposed to static (direct current) and oscillating (alternating current) uniform electric fields. In addition, we develop a robust method to quantify cell susceptibility using spike timing. Our results provide a precise mechanism for a functional role of endogenous field oscillations (e.g., gamma) in brain function and introduce a framework for considering the effects of environmental fields and design of low-intensity therapeutic neurostimulation technologies.

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“…Hamblin and Wood [4] compared the findings of the main studies that have examined the effects of GSM mobile phone radiofrequency emissions on human brain activity and sleep variables. Fourteen published studies reporting on human brain electrical activity measurements during and/or after such radiofrequency emissions were identified and compared.…”

Section: Human Studiesmentioning

confidence: 99%

Mobile phones and sleep - A review

Supe¹

2010

Polish Journal of Medical Physics and Engineering

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The increasing use of mobile phones has raised concerns regarding the potential health effects of exposure to the radiofrequency electromagnetic fields. An increasing amount research related to mobile phone use has focussed on the possible effects of mobile phone exposure on human brain activity and function. In particular, the use of sleep research has become a more widely used technique for assessing the possible effects of mobile phones on human health and wellbeing especially in the investigation of potential changes in sleep architecture resulting from mobile phone use. Acute exposure to a mobile phone prior to sleep significantly enhances electroencephalogram spectral power in the sleep spindle frequency range. This mobile phone-induced enhancement in spectral power is largely transitory and does not linger throughout the night. Furthermore, a reduction in rapid eye movement sleep latency following mobile phone exposure was also found, although interestingly, neither this change in rapid eye movement sleep latency or the enhancement in spectral power following mobile phone exposure, led to changes in the overall quality of sleep. In conclusion, a short exposure to the radiofrequency electromagnetic fields emitted by a mobile phone handset immediately prior to sleep is sufficient to induce changes in brain activity in the initial part of sleep. The consequences or functional significance of this effect are currently unknown and it would be premature to draw conclusions about possible health consequences.

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Effects of mobile phone emissions on human brain activity and sleep variables

Cited by 102 publications

References 29 publications

The Somnolent Youth-Sleep and the Influence of Exercise: A Narrative Review

The Somnolent Youth-Sleep and the Influence of Exercise: A Narrative Review

Spike Timing Amplifies the Effect of Electric Fields on Neurons: Implications for Endogenous Field Effects

Mobile phones and sleep - A review

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