ID Number		1957
Study Type		Human / Provocation
Model		900 & 1800 MHz (GSM), 2 GHz (UMTS) exposure and analysis of cognitive performance and memory.
Details		Volunteers (n = 44 self-reported hyppersensitive + 44 non-hypersensitive) were exposed to 900 (GSM) and 2 GHz (UMTS) base station signals for 50 minutes at an estimated peak 10-gram SAR of 1.4 W/kg using a mobile phone exposure system. During exposure, subjects were evaluated for cognitive performance including digit symbol substitution task (DSST), digit span task (DS), and a mental arithmetic task (MA). The authors report no effect on cognitive performance or physiological measurements of blood volume pulse (BVP), heart rate (HR), or skin conductance (SC). In other studies, human volunteers (n = 168) were exposed to 900 MHz (CW, GSM) RF at 1.4 W/kg (peak in the head) and analyzed for cognitive function and memory. Testing included 2x 50-minute sessions, one week apart. Endpoints for analysis include self-reported symptoms, biological correlation to symptoms, cognitive tasks (e.g., simple rxn time, choice rxn time, subtraction task, vigilance task), cardiovascular symptoms with regard to blood pressure and heart rate, sleepiness and performance and subsequent night sleep. No effects of RF exposure were reported. In a subsequent laboratory-based study, human volunteers ( n = 168) were exposed to 900 MHz (GSM) while listening to an auditory queues (300 Hz) from stereo headphones. The authors report no effect of RF exposure in distinguishing the auditory queues, and conclude exposure does not affect performance in an order threshold task.
Findings		No Effects
Status		Completed With Publication
Principal Investigator		University of Essex, UK
Funding Agency		MMF, MTHR (NRPB), UK, GSM Association
Country		UNITED KINGDOM
References		Cinel, C et al. Appl Cogn Psychol , (2008) 22:1113-1125 Eltiti, S et al. Bioelectromagnetics, (2009) 30:556-563 Cinel, C et al. Bioelectromagnetics, (2007) 28:493-496 Russo, R et al. Bioelectromagnetics, (2006) 27:215-220
Comments		Replication attempt of previous effects on cognitive tasks reported by Koivisto et al (2000). Mobile phone use among volunteers was as follows: 4% did not use a mobile phone, 35% used a mobile phone < 5 min/day, 61% used a phone > 5 min/day. All were asked not to use a mobile phone for 1 hour preceding the experimental session.