Study type: Medical/biological study (experimental study)

Acute mobile phone operation affects neural function in humans. med./bio.

Published in: Clin Neurophysiol 2002; 113 (10): 1623-1632

Aim of study (acc. to author)

To test whether exposure to an active mobile phone affects EEG as a function of time.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 3 x 20 min

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration continuous for 3 x 20 min
Modulation
Modulation type pulsed
Pulse width 0.577 ms
Repetition frequency 217 Hz
Additional info

Spoken extracts from a radio play (not audible to the subject) were played to the sending phone via a CD player at approximately 80 dB SPL (peak level).

Exposure setup
Exposure source
Distance between exposed object and exposure source 5 cm
Setup The mobile phone was positioned 5 cm radial to the subject's scalp midway between Oz and Pz, using a non-metallic external bracket. The phone was removed and switched on or off outside of the recording room before the start of each condition. The purported EMF attenuator (Q Link Ally) was positioned over the subject's chest (left sternum) using a comfortable chest-strap and was operated from a separate room.
Additional info A 20 min series of tasks were performed 3 times, each with one of the 3 following (counterbalanced and single-blind) exposure conditions: exposure to an active mobile phone (MP) concurrent exposure to an active MP and a purported EMF attenuator both MP and EMF attenuator deactivated (control).
Parameters
Measurand Value Type Method Mass Remarks
power 4 mW mean estimated - 3-4 mW

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

Exposure to an active mobile phone affects neural functions in humans, altering both resting EEG patterns and the evoked neural response to auditory stimuli, with a number of these changes occuring as a function of exposure duration.

Study character:

Study funded by

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