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  • 1.
    Johansson, Amanda
    et al.
    Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
    Forsgren, Sture
    Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.
    Stenberg, Berndt
    Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
    Wilen, Jonna
    Department of Radiation Sciences, Umeå University, Umeå, Sweden.
    Kaiezic, Nebojsa
    University of Gävle, Centre for Musculoskeletal Research.
    Sandstrom, Monica
    Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
    No effect of mobile phone-like RF exposure on patients with atopic dermatitis2008In: Bioelectromagnetics, ISSN 0197-8462, E-ISSN 1521-186X, Vol. 29, no 5, p. 353-362Article in journal (Refereed)
    Abstract [en]

    This study investigates the effect of exposure to a mobile phone-like radiofrequency (RF) electromagnetic field on people with atopic dermatitis (AD). Fifteen subjects with AD were recruited and matched with 15 controls without AD. The subjects were exposed for 30 min to an RF field at 1 W/kg via an indoor base station antenna attached to a 900 MHz GSM mobile phone. Blood samples for ELISA analysis of the concentration of substance P (SP), tumor necrosis factor receptor 1 (TNF RI), and brain derived neurotrophic factor (BDNF) in serum were drawn before and after the provocation (exposure/sham). Baseline heart rate and heart rate variability, local blood flow, and electrodermal activity were also recorded. No significant differences between the subject groups were found for baseline neurophysiological data. The cases displayed a serum concentration of TNF RI significantly higher than the control subjects and a significantly lower serum concentration of BDNF in the baseline condition. For SP there was no difference between groups. However, no effects related to RF exposure condition were encountered for any of the measured substances. As to symptoms, a possible correlation with exposure could not be evaluated, due to too few symptom reports. The result of the study does not support the hypothesis of an effect of mobile phone-like RF exposure on serum levels of SP, TNF RI, and BDNF in persons with AD.

  • 2.
    Lyskov, Eugene
    et al.
    University of Gävle, Belastningsskadecentrum.
    Kalezic, Nebojsa
    University of Gävle, Belastningsskadecentrum.
    Markov, Marko
    Mild, Kjell Hansson
    Thunberg, Johan
    University of Gävle, Belastningsskadecentrum.
    Johansson, Håkan
    University of Gävle, Belastningsskadecentrum.
    Low frequency therapeutic EMF differently influences experimental muscle pain in female and male subjects.2005In: Bioelectromagnetics, ISSN 0197-8462, E-ISSN 1521-186X, Vol. 26, no 4, p. 299-304Article in journal (Refereed)
    Abstract [en]

    Effects of a pulsating, half sine wave magnetic field (MF) with a frequency of 100 pps and 15 mT rms flux density, generated by the MD TEMF device (EMF Therapeutics, Inc., Chattanooga), on subjective pain rating, heart rate, and arterial blood pressure were tested in a double blind, crossover design study employing experimental muscle pain. Each of 24 healthy volunteers (12 females and 12 males, 24.7 +/- 3.2 years of age) received painful stimulation induced by the infusion of 5% hypertonic saline (HS) into the erector spinae muscle during real and sham MF exposure, in counterbalanced order. Exposure to MF differently affects subjective pain estimates in females and males. MF exposure increased averaged pain level and time integral of pain ratings in females, whereas no statistically significant difference for these characteristics was found in males. Pain related elevation of systolic and diastolic blood pressure was observed during both real and sham EMF exposure in female and male subjects.

  • 3.
    Wilén, Jonna
    et al.
    National Institute for Working Life, Umeå, Sweden.
    Johansson, Amanda
    National Institute for Working Life, Umeå, Sweden.
    Kalezic, Nebojsa
    University of Gävle, Centre for Musculoskeletal Research.
    Lyskov, Eugene
    University of Gävle, Centre for Musculoskeletal Research.
    Sandström, Monica
    National Institute for Working Life, Umeå, Sweden.
    Psychophysiological tests and provocation of subjects with mobile phone related symptoms2006In: Bioelectromagnetics, ISSN 0197-8462, E-ISSN 1521-186X, Vol. 27, no 3, p. 204-214Article in journal (Refereed)
    Abstract [en]

    The aim of the present study was to investigate the effect of exposure to a mobile phone-like radiofrequency (RF) electromagnetic field on persons experiencing subjective symptoms when using mobile phones (MP). Twenty subjects with MP-related symptoms were recruited and matched with 20 controls without MP-related symptoms. Each subject participated in two experimental sessions, one with true exposure and one with sham exposure, in random order. In the true exposure condition, the test subjects were exposed for 30 min to an RF field generating a maximum SAR(1g) in the head of 1 W/kg through an indoor base station antenna attached to a 900 MHz GSM MP. The following physiological and cognitive parameters were measured during the experiment: heart rate and heart rate variability (HRV), respiration, local blood flow, electrodermal activity, critical flicker fusion threshold (CFFT), short-term memory, and reaction time. No significant differences related to RF exposure conditions were detected. Also no differences in baseline data were found between subject groups, except for the reaction time, which was significantly longer among the cases than among the controls the first time the test was performed. This difference disappeared when the test was repeated. However, the cases differed significantly from the controls with respect to HRV as measured in the frequency domain. The cases displayed a shift in low/high frequency ratio towards a sympathetic dominance in the autonomous nervous system during the CFFT and memory tests, regardless of exposure condition. This might be interpreted as a sign of differences in the autonomous nervous system regulation between persons with MP related subjective symptoms and persons with no such symptoms.

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