“Head Only”-exposure of continuously growing rats to 900 MHz GSM signals

A relevant number of mobile phone users are children and adolescents. An in vivo study of continuously growing rats investigates the effect of electromagnetic exposure to a GSM-modulated 900 MHz field in consideration of e.g. the cognitive development. During lifetime, the body weight of the animals increases significantly while the brain-averaged specific absorption rate (SAR
_brain
) should be kept as constant as possible. A novel electro-magnetic exposure design was developed to expose up to 48 animals at 4 different excitation levels simultaneously.