Exposure a 900 MHz electromagnetic field results in reduced performance in sleep-dependent motor-sequence tasks in healthy subjects compared to controls.

PMID: 

Brain Stimul. 2013 Sep ;6(5):805-11. Epub 2013 Feb 24. PMID: 23482083

Abstract Title: 

Stimulation of the brain with radiofrequency electromagnetic field pulses affects sleep-dependent performance improvement.

Abstract: 

BACKGROUND: Sleep-dependent performance improvements seem to be closely related to sleep spindles (12-15 Hz) and sleep slow-wave activity (SWA, 0.75-4.5 Hz). Pulse-modulated radiofrequency electromagnetic fields (RF EMF, carrier frequency 900 MHz) are capable to modulate these electroencephalographic (EEG) characteristics of sleep.OBJECTIVE: The aim of our study was to explore possible mechanisms how RF EMF affect cortical activity during sleep and to test whether such effects on cortical activity during sleep interact with sleep-dependent performance changes.METHODS: Sixteen male subjects underwent 2 experimental nights, one of them with all-night 0.25-0.8 Hz pulsed RF EMF exposure. All-night EEG was recorded. To investigate RF EMF induced changes in overnight performance improvement, subjects were trained for both nights on a motor task in the evening and the morning.RESULTS: We obtained good sleep quality in all subjects under both conditions (mean sleep efficiency>90%). After pulsed RF EMF we found increased SWA during exposure to pulse-modulated RF EMF compared to sham exposure (P

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