Medical/biological Study (experimental study)
No effects of short-term GSM mobile phone radiation on cerebral blood flow measured using positron emission tomography. med./biol. By: Kwon MS, Vorobyev V, Kännälä S, Laine M, Rinne JO, Toivonen T, Johansson J, Teras M, Joutsa J, Tuominen L, Lindholm H, Alanko T, Hamalainen H
Published in: Bioelectromagnetics 2012; 33 (3): 247 - 256 ( PubMed Entry , Journal web site )
Aim of study (according to author)
To study the effects of a pulse modulated GSM handset signal on cerebral blood flow, using three different mobile phone locations (left ear, right ear, forehead) to test for possible exposure effects on brain regions close to the exposure source.
General category: mobile communication system, digital mobile phone, GSM, PW (pulsed wave)
| 902.4 MHz |
exposure duration: 12 times 5 min (including sham exposure) with a 10 min interscan interval
|power: 240 mW |
SAR: 1 W/kg average over mass (10 g) (phone at the right ear turned on - measured with the SAM phantom)
SAR: 1.1 W/kg average over mass (10 g) (phone at the left ear turned on - measured with the SAM phantom)
SAR: 1.4 W/kg average over mass (1 g) (phone at the right ear turned on - measured with the SAM phantom)
SAR: 1.5 W/kg average over mass (1 g) (phone at the left ear turned on - measured with the SAM phantom)
SAR: 27 mW/kg max value (brain) (spatial average when the phone at the forehead turned on)
SAR: 12.8 mW/kg max value (brain) (spatial average when the phone at the left ear turned on)
SAR: 17.4 mW/kg max value (brain) (spatial average when the phone at the right ear turned on)
FIELD View further expo parameters
partial body exposure: eft ear, right ear, forehead
Methodsinvestigation on living organism
investigated organ system: brain/CNS
time of investigation: during exposure
Main outcome of study (according to author)
The mobile phone exposure induced a slight temperature rise in the ear canals, but did not affect brain hemodynamics and task performance. The data provided no evidence for acute effects of short-term mobile phone exposure on cerebral blood flow.
(Study character: medical/biological study, experimental study, full/main study, double-blind study)
Study funded by
- Tekes (National Technology Agency), Finland
- Curcio G et al. (2012): Effects of mobile phone signals over BOLD response while performing a cognitive...
- Spichtig S et al. (2012): Assessment of intermittent UMTS electromagnetic field effects on blood...
- Spichtig S et al. (2012): Assessment of potential short-term effects of intermittent UMTS electromagnetic...
- Lindholm H et al. (2011): Thermal effects of mobile phone RF fields on children: A provocation study.
- Kwon MS et al. (2011): GSM mobile phone radiation suppresses brain glucose metabolism.
- Volkow ND et al. (2011): Effects of cell phone radiofrequency signal exposure on brain glucose...
- Mizuno Y et al. (2009): Effects of W-CDMA 1950 MHz EMF emitted by mobile phones on regional cerebral...
- Aalto S et al. (2006): Mobile phone affects cerebral blood flow in humans.
- Wolf M et al. (2006): Do GSM 900 MHz signals affect cerebral blood circulation? A near-infrared...
- Huber R et al. (2005): Exposure to pulse-modulated radio frequency electromagnetic fields affects...
- Haarala C et al. (2003): Effects of a 902 MHz mobile phone on cerebral blood flow in humans: a PET...
- Huber R et al. (2002): Electromagnetic fields, such as those from mobile phones, alter regional...
Glossary: 0-back task, acute, biological, brain, cerebral blood flow, CNS, digital, double-blind study, ear, ear canals, endpoint, evidence, exposure, full/main study, GSM, hemodynamics, human, induced, mobile communication, mobile phone, neurological, organism, partial body exposure, phantom, positron emission tomography, power, pulsed, pulse modulated, PW, regional cerebral blood flow, SAR, sham exposure, signal, skin, subjects, thermoregulation, vigilance, visual
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