Medical/biological Study (experimental study)
Mobile phone exposure and spatial memory. med./biol. By: Wiholm C, Lowden A, Kuster N, Hillert L, Arnetz BB, Akerstedt T, Moffat SD
Published in: Bioelectromagnetics 2009; 30 (1): 59 - 65 ( PubMed Entry , Journal web site )
Aim of study (according to author)
To investigate the effects of a 2.5 h exposure to radiofrequency fields typical of that emitted from GSM mobile phones on spatial memory performance in subjects with and without self-reported symptoms attributed to mobile phone use.
19 non-symptomatic subjects (7 females) and 23 symptomatic subjects (14 females) were examined during an exposure and a sham exposure condition.
General category: mobile communication system, digital mobile phone, GSM
| 884 MHz |
exposure duration: continuous for 2.5 h
|SAR: 1.4 W/kg average over time (10 g) (peak spatial)|
SAR: 1.95 W/kg peak value (10 g) (non-DTX)
SAR: 0.23 W/kg peak value (10 g) (DTX)
FIELD View further expo parameters
partial body exposure: head, ear (left hemisphere)
investigation on living organism
- cognitive/behavioral endpoints:
virtual spatial navigation task modeled after Morris water maze with spatial memory (distance traveled on each trial) and learning (amount of improvement across trials) as parameters
investigated organ system: brain/CNS
time of investigation: before and after exposure
Main outcome of study (according to author)
Before the exposure there was no difference in performance between groups. After the exposure the symptomatic group improved in performance (shorter distance traveled) while there was no such effect in the non-symptomatic group.
The authors suggested that radiofrequency exposure contributes to a biological arousal improving attention in the symptomatic group and thereby contributing to the improved performance.
(Study character: medical/biological study, experimental study, full/main study, double-blind study, repeated measures design, cross-over study, provocation study)
Study funded by
- Mobile Manufacturers Forum (MMF), Belgium
Glossary: arousal, attention, behavioral, biological, brain, CNS, cognitive, cross-over study, digital, double-blind study, DTX, ear, emitted, endpoint, exposure, full/main study, GSM, hemisphere, human, learning, memory, mobile communication, mobile phone, Morris water maze, organism, partial body exposure, provocation study, pulsed, PW, radiofrequency, SAR, sham exposure, subjects, symptomatic
- Sauter C et al. (2011): Effects of exposure to electromagnetic fields emitted by GSM 900 and WCDMA...
- Fragopoulou AF et al. (2010): Whole body exposure with GSM 900MHz affects spatial memory in mice.
- Haarala C et al. (2007): Pulsed and continuous wave mobile phone exposure over left versus right...
- Regel SJ et al. (2007): Pulsed radio frequency radiation affects cognitive performance and the waking...
- Wiholm C et al. (2007): The Effects of 884 MHz GSM Wireless Communication Signals on Spatial Memory...
- Besset A et al. (2005): No effect on cognitive function from daily mobile phone use.
- Haarala C et al. (2004): 902 MHz mobile phone does not affect short term memory in humans.
- Croft RJ et al. (2002): Acute mobile phone operation affects neural function in humans.
- Preece AW et al. (1999): Effect of a 915-MHz simulated mobile phone signal on cognitive function in man.
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