# RF-012 — Pulse modulation and regional blood flow

Why this matters
The way a radio signal is delivered may matter as well as its frequency. This human study's abstract reports different brainwave responses to pulsed and continuous signals, alongside blood-flow changes. Full methods still need review before drawing dose conclusions; the observation points to waveform as a health-assessment question.

Id: RF-012

Author: Huber et al.

Full Authors: R. Huber; V. Treyer; A. A. Borbély; J. Schuderer; J. M. Gottselig; H.-P. Landolt; E. Werth; T. Berthold; N. Kuster; A. Buck; P. Achermann

Year: 2002

Title: Electromagnetic fields, such as those from mobile phones, alter regional cerebral blood flow and sleep and waking EEG

Journal: journal of sleep research

Citation: Huber R, Treyer V, Borbély AA, Schuderer J, Gottselig JM, Landolt HP, Werth E, Berthold T, Kuster N, Buck A, Achermann P. Electromagnetic fields, such as those from mobile phones, alter regional cerebral blood flow and sleep and waking EEG. Journal of Sleep Research. 2002;11(4):289-295. doi:10.1046/j.1365-2869.2002.00314.x.

Doi: 10.1046/j.1365-2869.2002.00314.x

Pmid: 12464096

Topic: Brain activity and sleep

Verification Group: Original abstract verified

Record Role: Original abstract verified

Featured: False

Exposure: 900 MHz; 30-minute head exposure.

Design: Human PET and sleep-EEG experiments.

Finding: The original abstract reports pulse-modulated exposure altered regional cerebral blood flow and waking/sleep EEG; continuous-wave exposure did not produce the same EEG result.

Boundary: Retrieve full methods before quoting precise sample/dosimetry details; physiological outcomes are not disease endpoints.

Related: RF-010 and other Zurich publications require cohort linkage

Protection Question: Could signal modulation help explain differences in brain responses? Full methods and delivered-dose details remain necessary before the abstract-level result can inform a protection conclusion.

Access: Original abstract reviewed

Notice: Primary PubMed linked-notice record checked 20 Oct 2026; no correction, concern or retraction linked at check. This is not an exhaustive publisher-history certification.

Funding: Not established from retrieved material.

Conflicts: Not established from retrieved material.

Source Url: https://doi.org/10.1046/j.1365-2869.2002.00314.x

Retrieval Links: https://doi.org/10.1046/j.1365-2869.2002.00314.x | https://pubmed.ncbi.nlm.nih.gov/12464096/

Verification Date: 2026-10-20