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To study the short-term effects of the GSM mobile phone electromagnetic fields on the mismatch negativity and associated brain processing.
The mismatch negativity is a sensitive indicator of pre-attentive auditory discrimination processing.
Mismatch negativity was elicited using a multifeature paradigm where four deviant types (duration, intensity, frequency, having a gap in the middle of a tone) appeared in a sequence of identical stimuli. 17 healthy volunteers (12 female) were investigated. Participants were watching a movie without sound and they were instructed not to pay attention to the auditory stimuli.
|ばく露時間||1 h in 6 minute blocks|
|Pulse width||0.58 µs|
|Repetition frequency||217 Hz|
|ばく露装置の詳細||earplug-shaped earphones inserted in both ears; GSM phone attached to a headset placed on either ear in normal phoning position|
The mismatch negativity latency and amplitude showed no significant differences due to electromagnetic field exposure on either side.
No evidence was found that acute exposure to GSM mobile phone electromagnetic fields affects cortical auditory change detection processing reflected by the mismatch negativity. Pre-attentive change detection might not be affected by electromagnetic field exposure.