Effects of WiFi Exposure on Sleep

Charite University, Berlin, Germany30 enrolled

Overview

Effects of Wifi exposure on sleep and sleep-related Memory consolidation are investigated in a double-blind, sham-controlled fully counterbalanced study design.

Introduction: Since several years Wireless Local Networks (WLAN, WiFi) are widely spread and operated in households. Many people feel that the presence of radiofrequency technologies impairs their health. Sleep problems are among the most often complained complaints. The present study aims to contribute to answer the question, whether biological effects of a WiFi exposure can be assessed by objective measures. The results of this study will expand the database on possible acute effects of WiFi exposure and thus qualitatively contribute to the discussion whether sleep is affected by exposure from radiofrequency electromagnetic fields. Methods: A double-blind, sham-controlled experiment in the sleep laboratory with exposure conditions delivered in a balanced randomized cross-over design. Subjective sleep quality of volunteers is assessed by questionnaires. Macro- and microstructure of sleep are measured by polysomnography. Furthermore, a possible impact on sleep related memory consolidation is tested. To do so declarative, procedural and emotional memory tasks are used. Exposure is delivered by a specially developed system, which simulates field strengths and signals occurring in a subject sleeping in the close proximity of a WiFi-access point. This exposure system is necessary to allow for a double-blind implementation and monitoring as well as for the realization of defined exposure parameters.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

QUADRUPLE

Enrollment

Conditions

Sleep

Interventions

radio frequency electromagnetic fieldOTHER

Exposure system delivers emissions comparable to those from WiFi access point close to the bed or sham (nor exposure)

Eligibility

Sex: FEMALEMin age: 20 YearsMax age: 30 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Only right-handed * non-smokers * Pittsburgh Sleep Quality Index (PSQI) score \< 5 * no extreme morning/evening preference \[Morningness-Eveningness Questionnaire (MEQ) score ≥ 31 or ≤ 69 * no indication of depression or somatic symptoms as assessed by a medical examination and validated questionnaires \[Patient Health Questionnaires (PHQ-9 and PHQ-15) scores ≤ 5 and ≤ 10, respectively Exclusion Criteria: * history of a psychiatric disorder, * history of a neurological and/or sleep disorder * excessive daytime sleepiness \[Epworth Sleepiness Scale (ESS) score \> 9; * non-regular sleep-wake schedule as assessed by a sleep diary * a regular intake of medication that affects the central nervous system, excessive caffeine and/or alcohol consumption, regular and occasional drug use, * metal implants * periodic leg movement arousal index \> 10/h in the Adaptation night * apnoea-hypopnoea-index \> 5/h in the Adaptation night.

Locations (1)

Charité - University Medicine Berlin

Berlin, Germany

Outcomes

Primary Outcomes

sleep Efficiency index (total sleep time in % of time in bed)

Summary variable describing objective sleep quality

Time frame: 8 hours

Secondary Outcomes

declarative memory

Number of remembered word pairs in the Word Pair Association Test

Time frame: 8 hours

sleep EEG power

power spectra of the sleep EEG

Time frame: 8 hours

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.