A near-infrared spectrophotometry study Effects of mobile phone type GSM 900MHz signals on the cerebral blood circulation were investigated using near-infrared spectrophotometry in a trial on 16 healthy volunteers. Borderline significant short term responses of oxyhemoglobin and deoxyhemoglobin concentration were observed during exposure, corresponding to a decrease of cerebral blood flow and volume. These were smaller than regular physiological changes and these responses may be spurious and require further study. No dose-response relation or long term response was detected. Bibliographic information: Wolf et al., Optics Express, Vol. 14, No. 13, pp., June 2006, Abstract and Full Publication Text
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