Effects of thirty minutes mobile phone use on the human sensory cortex.
OBJECTIVE
To investigate whether the pulsed high-frequency electromagnetic field (pulsed EMF) emitted by a mobile phone for 30 min has short-term effects on human somatosensory evoked potentials (SEPs).


METHODS
We studied somatosensory evoked potentials (SEPs) in 12 normal volunteers before and after exposure to the electromagnetic field emitted by a mobile phone for 30 min compared with sham exposure. In 7 out of the subjects we also measured the recovery function of the SEP.


RESULTS
Neither SEPs nor their recovery function was affected by exposure to pulsed EMF emitted by a mobile phone or sham phone use.


CONCLUSIONS
As far as the present methods are concerned, 30 min mobile phone use has no short-term effects on the human sensory cortex.


CONCLUSIONS
This is the first study of SEPs after electromagnetic exposure by the mobile phone. Our results support the safety of the mobile phone.
Yuasa
Kaoru
K
Department of Neurology, Division of Neuroscience, Graduate School of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
Arai
Noritoshi
N
Okabe
Shingo
S
Tarusawa
Yoshiaki
Y
Nojima
Toshio
T
Hanajima
Ritsuko
R
Terao
Yasuo
Y
Ugawa
Yoshikazu
Y
D000328:Adult; D000344:Afferent Pathways / Q000503:physiopathology / Q000528:radiation effects; D040421:Cell Phone; D004558:Electric Stimulation; D004574:Electromagnetic Fields / Q000009:adverse effects*; D005073:Evoked Potentials, Somatosensory / Q000502:physiology / Q000528:radiation effects*; D005260:Female; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000502:physiology; D008875:Middle Aged; D009431:Neural Conduction / Q000502:physiology / Q000528:radiation effects; D011930:Reaction Time / Q000502:physiology / Q000528:radiation effects; D013003:Somatosensory Cortex / Q000503:physiopathology* / Q000528:radiation effects*; D013997:Time Factors; D014110:Touch / Q000502:physiology