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To explore the sensitivity of auditory event-related potentials to electromagnetic emissions.
The current study exposed subjects while they performed tasks, and employed a mobile phone with a substantial and consistent power output. In order to study alterations in sensory processing that may be produced by electromagnetic field exposure, the event-related potential parameters were assessed during an auditory oddball task.
|ばく露時間||continuous for 1 h|
|Pulse width||576 µs|
|Duty cycle||12.5 %|
|Repetition frequency||217 Hz|
|ばく露装置の詳細||Participants were seated in a comfortable chair with an electro-cap fitted (comprising 62 tin electrodes). A mobile phone in a cradle was placed over the right temporal region in a normal use position. Audio circuits were disabled and a padding was placed between the handset and its casing to prevent any acoustic or thermal cues. The mobile phone was set via lap-top to a nominal mean power output of 250 mW.|
|Additional information||There were two sessions one week apart, each with real or sham exposure for half of the participants in single-blind, counterbalanced, crossover conditions.|
The results suggest that mobile phone radiation may affect neural activity, particularly in proximity to the phone, however caution should be applied due to the small sample size. N100 amplitude decreased, N100 latency shortened and P300 latency was delayed during exposure compared to sham exposure. Effects were greatest over right hemisphere and midline sites (closest to the active mobile phone). Reaction time increased in the exposure relative to sham exposure condition and no difference in accuracy was found.