Subject:  Cell-phones/Brain bioeffects...... (fwd)
Date:     Wed, 18 Nov 1998 171343 -0600 (CST)
From:     "Roy L. Beavers" <rbeavers@llion.org>
To:       emfguru <rbeavers@llion.org>
--------------------------------------------------


......Thanks Randy.......guru.....

---------- Forwarded message ----------
Date: Wed, 18 Nov 1998 15:10:04 -0800
From: Randy N Ross 
To: Robert Riedlinger ,
    Roy Beavers 
Subject: Brain info

>  Cell phones may affect brain activity
> >
> >    NEW YORK, Nov 17 (Reuters Health) -- Cellular phones emit pulsed
> >    high-frequency electromagnetic fields that may affect the electrical
> >    activity in the human brain in certain situations, according to a
> >    study in the October 5th issue of the journal Neuroreport.
> >
> >    But German researchers report that the health effects of their
> >    findings are unclear.
> >
> >    Such phones have not been found to have an impact on EEG
> >    (electroencephalogram) traces, the method used to measure brain
> >    electrical activity. However, in the new study, 13 healthy men in
> >    their 20s were asked to press a button when they heard certain
> >    high-frequency tones in a series of tones emitted every 2 seconds.
> >    During the study, a mobile phone was mounted to the study subject's
> >    head, but the subject did not know when the phone was switched on.
> >    While the men were engaged in the task set, EEG readings were recorded
> >    from 30 positions on the scalp.
> >
> >    After the test was performed several times, the EEG results were
> >    averaged and the researchers found that exposure to an active cellular
> >    phone appeared to influence electrical activity in the left hemisphere
> >    of the brain, that closest to the phone. But this effect was only
> >    noted when the brain was engaged in the task set. No such effect was
> >    seen when the subjects listened to tones not related to the
> >    button-pushing task, report Dr. Carsten Eulitz of the University of
> >    Konstanz and colleagues in Berlin, Germany.
> >
> >    ``This gives further evidence to the possibility that neural responses
> >    as reflected in the EEG can be modulated through radiation emitted by
> >    mobile phones,'' they write.
> >
> >    But it is not clear what, if any, effect the phones may have on
> >    health, the researchers note.
> >
> >    ``This study does not allow us to determine any health risk, nor is it
> >    clear what behavioral consequences PEMF (pulsed high-frequency
> >    electromagnetic fields) exposure might have,'' they conclude.
> >
> >    SOURCE: Neuroreport 1998;9:3229-3232.
> >

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Randy Ross, M. Sc.
Radiation Protection Branch
British Columbia Ministry of Health
Tel. (604) 660-6634, Fax. (604) 660-6663
WEB SITE http://www.hlth.gov.bc.ca/rpteb/





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Reprinted with permission of Roy Beavers, http://www.feb.se/EMF-L/EMF-L.html