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To examine possible influences of a 902 MHz electromagnetic field emitted by cellular phones on cognitive functioning in healthy humans.
Modulation type: pulsed
ばく露時間: continuous for about 1 h
|ばく露時間||continuous for about 1 h|
|Pulse width||577 µs|
|Repetition frequency||217 Hz|
|Distance between exposed object and exposure source||4 cm|
|ばく露装置の詳細||A GSM telephone was mounted on the subject's head in normal position for use. The antenna was located about 4 cm apart from the head, over the posterior areas of the left temporal lobe. The RF power was switched on and off via a data cable from a laptop.|
|Additional information||Each subject participated in two testing sessions with or without RF exposure which were separated by 24 hours.|
The data showed that the exposure to the electromagnetic field speeded up response times in simple reaction time and vigilance tasks. The cognitive time needed in a mental arithmetics task was decreased. The data indicate that exposure to the electromagnetic field emitted by cellular phones may have a facilitatory effect on brain functioning, especially in tasks requiring attention and manipulation of information in working memory.