StopUMTS Logo
how to get rid of moles
Zoeken
   
Voorlichting
15/06/15How to connect an iPad or
15/06/15Documentaire DE VERBORGEN
Artikelen
02/07/15Docs: Wireless devices ca
25/06/15MRI-scanner slecht voor h
25/06/15Kritiek op Van Rongen van
25/06/15Spaar- en LED lampen: kri
21/06/15Mobile phone towers in Hy
18/06/15Kinderen, school en stral
Berichten Nederland
03/07/15'Weinig onafhankelijk ond
02/07/15Wat zijn de mogelijk scha
25/06/15'Nederland bij top vijf l
25/06/15Mobiel internet traag in
23/06/15Onderzoek kanker stilgele
Berichten België
18/06/15Bodytalk zonder brains, p
11/06/15CD&V: ''Nog niets beslist
Berichten Internationaal
01/07/15USA: FCC: ‘Prime Exampl
28/06/15Digital Detox hotel met u
25/06/15Japan, EU: we'll research
25/06/15China: 'Pregnancy wi-fi'
Ervaringen | Appellen/oproepen
29/06/15Stadsbus
25/06/15Ervaringsverhaal van een
16/06/15Schiphol, ervaring, klach
Onderzoeken
01/07/15Powerwatch Science Update
27/06/15Effect of mobile telephon
27/06/15Habits of cell phone usag
Veel gestelde vragen
04/06/15Vakantie ? Witte z
03/03/15Answers to Commonly Asked
Juridische informatie
10/06/15Wireless carriers sue to
24/05/15High Court van Rajastan g
17/04/1540 NGOs lodge complaint o
Oproepen
29/06/15Stralingsarme locaties op
13/06/15Landelijke contactdag EHS
30/05/15Lezing in Nijkerk op 30 m
Folders
25/07/14Symptoms of exposure
07/04/14WiFi op school?
Briefwisselingen | Archief: 2008, 2005
22/05/15Brief naar MAX
09/05/15Briefwisseling met gemeen
Illustraties
 Algemeen
 Fotoalbum zendmasten
 Wetenschappelijke illustraties
Australiè: Sommige mensen blijken veel gevoeliger voor radiofrequente straling mobieltjes.    
Ga naar overzicht berichten in: Berichten Internationaal

Australiè: Sommige mensen blijken veel gevoeliger voor radiofrequente straling mobieltjes.
vrijdag, 03 augustus 2012 - Dossier: Internationale berichten


Resultaten van de onderzoeksgroep van prof. Rodney Croft van de universiteit van Wollongong laten zien dat sommige mensen veel gevoeliger zijn voor de straling van mobieltjes (radiofrequente straling) dan anderen. De implicatie is dat studies waarbij door statistische correctie (zie Zwitsers Onderzoek) sommige subgroepen uitgesloten zijn in het verleden tot foutieve conclusies hebben geleid:

Bron: ABC Science 31 juli 2012

Could mobiles affect some more than others?

Auteur: Anna Salleh

The findings don't point to an effect on health per se raises questions about the reliability of previous research findings, say researchers.

Mobile phones affect the brainwaves of some individuals more than others, say researchers, who are calling for a rethink about how we study the effects of the pervasive technology.

Professor Rodney Croft, of the University of Wollongong, and colleagues, report their findings in the journal Bioelectromagnetics.

''The kind of studies that we do may be overlooking some problems,'' says Croft, who studies radiofrequency health effects.

Some studies have suggested that mobile phones can increase human electroencephalogram (EEG) activity during wake and sleep, says Croft.

But findings, including those made by Croft and colleagues in an NHRMC-funded study, have found that the increase in brainwave activity does not appear to have health effects.

''We found on average there was an increase but it was very small and there was no effect on sleep quality,'' says Croft.

But, Croft and colleagues did notice that the effect on the brainwaves was much greater in some people than in others.

They hypothesised that the averaging out of effects across the whole group was masking individual variability in sensitivity to mobile phone emissions.

''It could be that people are responding quite differently, with some people exhibiting no effect and others exhibiting a substantial effect,'' says Croft.
Follow-up study

To test if there were any individual differences in the effect of mobile phones on EEG and sleep, the researchers retrieved 20 volunteers who had been involved in their previous study and tested them again.

''The logic was that if there were individual differences, we'd find that those who had an effect the first time would have an effect the second time,'' says Croft. ''And those that didn't have an effect the first time wouldn't have an effect the second time.''

For two consecutive nights, volunteers were exposed for 30 minutes to a mobile phone, positioned in a cradle over the right temporal region, before going to sleep.

On one night the phone was continuously transmitting and on the other it was turned off - a so-called 'sham control'. The volunteers didn't know whether the phone was turned or not.

Brainwave monitoring during sleep showed, in keeping with previous findings, that exposure to mobile phones increased EEG activity during the first 30 minutes of non-rapid eye movement (non-REM) sleep.

But what was most interesting was the increase was more prominent in those individuals who had shown an increase in the previous study, supporting Croft and colleagues' hypothesis.

''The response to mobile phones seems to be mediated by some kind of individual difference,'' says Croft.

While Croft and colleagues still found no impact on the quality of sleep, they say the findings question the reliability of previous studies, including those which have found no effect on EEG.

''Finding no effect or a very small effect could be the result of averaging people together. By looking at groups as a whole we may be missing important things,'' says Croft. ''It raises the question whether we can be as confident in past research as we have been.''

''Given the far-reaching implications of mobile phone research, we may need to rethink the interpretation of results and the manner in which research is conducted in this field,'' say Croft and colleagues.
Sensitive subgroup?

The research has been welcomed by Dr Edoardo Aromataris, of the The Joanna Briggs Institute, which assesses evidence for healthcare.

Aromataris says the study suggests that there could be a subgroup of people whose EEGs are predisposed to being effected by mobile phones.

''It might be a physiological difference, or it might be a psychological difference,'' he says. ''If this is true, all of what has gone before will be put to question.''

Aromataris says individual differences in physiology are already known to be very important. For example, it causes some individuals to be more sensitive to the effect of drugs than others, something that is often not discovered until after drugs are on the market.

He suggests it could be useful for researchers to eventually develop and test hypotheses about which subgroups of people are most sensitive to mobile phone impact on EEG.

''This is really how science progresses,'' says Aromataris. ''Croft and colleagues have seen something there that others haven't and that could potentially spin off research in another direction or it could not.''

Voor het originele artikel zie:
www.abc.net.au/science/articles/2012/07/31/3556674.htm .


Ga terug naar het hoofdmenu
Afdrukken | Vragen | RSS | Disclaimer