title: Modeling cell dynamics under mobile phone radiation.
abstract: Perturbations by pulse-modulated microwave radiation from GSM mobile phones on neuron cell membrane gating and calcium oscillations have been suggested as a possible mechanism underlying activation of brain states and electroencephalographic epiphenomena. As the employ of UMTS phones seems to reveal other symptoms, a unified phenomenological framework is needed. In order to explain possible effects of mobile phone radiation on cell oscillations, GSM and UMTS low-frequency envelopes have been detected, recorded and used as input in cell models. Dynamical systems endowed with contiguous regular and chaotic regimes suitable to produce stochastic resonance can both account for the perturbation of the neuro-electrical activity and even for the low intensity of the signal perceived by high sensitive subjects. Neuron models of this kind can be employed as a reductionist hint for the mentioned phenomenology. The Hindmarsh-Rose model exhibits frequency enhancement and regularization phenomena induced by weak GSM and UMTS. More realistic simulations of cell membrane gating and calcium oscillations have been performed with the help of an adaptation of the Chay-Keizer dynamical system. This scheme can explain the suspected subjective sensitivity to mobile phone signals under the thermal threshold, in terms of cell calcium regularity mechanisms. Concerning the two kinds of emission, the stronger occupation of the ELF band of last generation UMTS phones is compensated by lower power emitted.
authors.affiliation: Università di Padova, Padova, Italy. tullio.minelli@pd.infn.it
authors.forename: Tullio Antonio
authors.initials: TA
authors.lastname: Minelli
authors.forename: Maurizio
authors.initials: M
authors.lastname: Balduzzo
authors.forename: Francesco Ferro
authors.initials: FF
authors.lastname: Milone
authors.forename: Valentina
authors.initials: V
authors.lastname: Nofrate
mesh_terms: D015220:Calcium Channels / Q000528:radiation effects; D002462:Cell Membrane / Q000528:radiation effects*; D040421:Cell Phone; D004569:Electroencephalography / Q000528:radiation effects; D004574:Electromagnetic Fields / Q000009:adverse effects; D006801:Humans; D008954:Models, Biological; D009474:Neurons / Q000528:radiation effects*
chemical_list: D015220:Calcium Channels