# RF-032 — Blinded experiment joins sleep physiology to reduced task improvement

Why this matters
A good night's sleep is something people value for how they function the next day. Under this study's unusual pulsed exposure, young men slept slightly less and showed less overnight improvement on one tapping-task measure. That functional result deserves independent testing; it does not establish a sleep disorder.

Id: RF-032

Author: Lustenberger et al.

Full Authors: Caroline Lustenberger; Manuel Murbach; Roland Dürr; Marc Ralph Schmid; Niels Kuster; Peter Achermann; Reto Huber

Year: 2013

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

Journal: Brain Stimulation

Citation: Lustenberger C, Murbach M, Dürr R, Schmid MR, Kuster N, Achermann P, Huber R. Stimulation of the brain with radiofrequency electromagnetic field pulses affects sleep-dependent performance improvement. Brain Stimul. 2013;6(5):805-811. doi:10.1016/j.brs.2013.01.017.

Doi: 10.1016/j.brs.2013.01.017

Pmid: 23482083

Topic: Human sleep; cognitive performance

Verification Group: Original text reviewed

Record Role: Original text reviewed

Featured: True

Exposure: 900 MHz; 7.1-ms pulses at 10 W/kg peak spatial SAR over 10g, arranged in bursts (1 W/kg burst average); all-night average 0.15 W/kg. Repeated 18-min on/off pattern; six-minute average never exceeded 0.34 W/kg.

Design: 16 healthy men aged 18-21; randomized double-blind crossover, adaptation before each of two nights; objective sleep EEG and evening/morning tapping task.

Finding: Overnight reduction in motor-task response-time variance was smaller during exposure (28.97%) than sham (49.04%; adjusted condition p=0.03). Sleep time fell 9.23 min (p=0.04); slow-wave activity increased in fourth NREM episode.

Boundary: Small experimental study; response-time variance is a task endpoint, not diagnosed memory disease. Unusual pulse pattern and different SAR averaging periods must be preserved; no automatic inference of human-limit compliance.

Related: Zurich sleep/dosimetry programme overlaps investigators in RF-010/RF-012; this is a distinct experiment, not an independent institution's replication.

Protection Question: Could exposure-related changes in sleep and overnight task improvement matter to daily function? The small experiment and unusual pulse/averaging conditions leave clinical significance and a general protective threshold unresolved.

Access: Original author/institution-hosted uncorrected proof reviewed; citation/result direction checked against PubMed publication record

Locator: Proof pp.2-4 Methods, Statistics, Results; Figures 1-3; p.1 funding/conflicts; final pp.805-811

Notice: Scite metadata checked 20 Oct 2026; no editorial notice returned. Primary bibliographic records and targeted notices were checked where retrievable; no retraction or expression of concern located. This is not certification that no notice exists. Source is an uncorrected proof, not an independently counted publication.

Funding: Swiss Research Foundation on Mobile Communication (FSM A2008-08); Swiss National Science Foundation (P00A-114923).

Conflicts: Authors declared no competing interests (proof p.1).

Source Url: https://doi.org/10.1016/j.brs.2013.01.017

Retrieval Links: https://doi.org/10.1016/j.brs.2013.01.017 | https://pubmed.ncbi.nlm.nih.gov/23482083/ | https://www.emf.ethz.ch/fileadmin/redaktion/public/downloads/2_foerderung/dokumente_projekte/Lustenberger__2013__Brain_Stimulation_UNCORRECTED_PROOFS.pdf

Verification Date: 2026-10-20