Medizinische/biologische Studie (experimentelle Studie)

Effect of a 902 MHz electromagnetic field emitted by mobile phones on human cognitive function: A replication study med./bio.

[Wirkungen eines 902 MHz elektromagnetischen Feldes emittiert von Mobiltelefonen auf die kognitiven Funktionen von Menschen: Eine Wiederholungsstudie]

Von: Haarala C, Bjornberg L, Ek M, Laine M, Revonsuo A, Koivisto M, Hämäläinen H

Veröffentlicht in: Bioelectromagnetics 2003; 24 (4): 283-288

Ziel der Studie (lt. Autor)

Die Studie war eine Wiederholung und Erweiterung mit methodologischen Verbesserungen einer früheren Studie zu den Wirkungen elektromagnetischer Felder (EMF) eines 902 MHz-Handys auf die kognitiven Funktionen des Menschen.

Endpunkt

Wirkungen auf Kognition/Verhalten: kognitive Funktion

Exposition/Befeldung (teilweise nur auf Englisch)

- Mobilfunk
- GSM

Exposition	Parameter
Exposition 1: 902 MHz Modulationsart: gepulst Expositionsdauer: kontinuierlich für 65 min	Leistung: 0,25 W Mittelwert SAR: 0,88 W/kg Mittelwert über Masse (1 g) SAR: 1,2 W/kg Spitzenwert

Allgemeine Informationen

This study is an attempt to replicate earlier findings reported in the reference article.

Exposition 1

Hauptcharakteristika

Frequenz	902 MHz
Typ	elektromagnetisches Feld
Expositionsdauer	kontinuierlich für 65 min

Modulation

Modulationsart	gepulst
Pulsbreite	577 µs
Folgefrequenz	217 Hz
Zusatzinfo	Discontinuous transmission mode was not activated.

Expositionsaufbau

Expositionsquelle	Mobiltelefon
Abstand zw. exponiertem Objekt und Expositionsquelle	4 cm
Aufbau	A GSM telephone placed in a leather and vinyl case was mounted with an adjustable rubber head cap on the left side of the subject's head in the normal position of use. The antenna was located about 4 cm apart from the head, over the posterior part of the left hemisphere. The RF power was switched on and off via a data cable from a laptop.
Zusatzinfo	Each subject performed the tasks twice on separate days with 24 ± 1 h between the testing sessions: one day with exposure and another day with sham exposure. Both the subjects and the experimenters were unaware of the exposure condition (double blind).

Parameter

Messgröße	Wert	Typ	Methode	Masse	Bemerkungen
Leistung	0,25 W	Mittelwert	-	-	-
SAR	0,88 W/kg	Mittelwert über Masse	gemessen	1 g	-
SAR	1,2 W/kg	Spitzenwert	gemessen	-	-

Mess- und Berechnungsdetails

The SAR of the phone was measured with SPEAG's Dosimetric Assessment System 3 (DASY3).

Referenzartikel

Koivisto M et al. (2000): Effects of 902 MHz electromagnetic field emitted by cellular telephones on response times in humans

Exponiertes System:

Mensch
Teilkörperexposition: Kopf

Methoden Endpunkt/Messparameter/Methodik

Kognitions-/Verhaltensendpunkte: Reaktionszeit; Genauigkeit der Antworten

Untersuchtes System:

Untersuchung am lebenden Organismus

Untersuchungszeitpunkt:

während der Befeldung

Hauptergebnis der Studie (lt. Autor)

Die Ergebnisse deuten beide darauf hin, dass EMF entweder keine Wirkung auf die kognitiven Funktionen haben und die dargestellten Befunde lediglich statistisches Rauschen sind, oder dass der EMF-Effekt so klein ist, dass er auf Verhaltensebene nur gelegentlich festgestellt werden kann. Die Ergebnisse der früheren Studie wurden nicht bestätigt.

Studienmerkmale:

medizinische/biologische Studie
experimentelle Studie
Replikations-/Reproduktionsstudie

Studie gefördert durch

Benefon, Finland
Elisa Communications Corporation, Finland
Finnish 2G
Nokia
Sonera, Finland
Tekes (National Technology Agency), Finland
University of Turku, Finland

Replizierte Studien

Koivisto M et al. (2000): Effects of 902 MHz electromagnetic field emitted by cellular telephones on response times in humans

Themenverwandte Artikel

Verrender A et al. (2016): Pulse modulated radiofrequency exposure influences cognitive performance
Malek F et al. (2015): Effect of short-term mobile phone base station exposure on cognitive performance, body temperature, heart rate and blood pressure of Malaysians
Loughran SP et al. (2013): No increased sensitivity in brain activity of adolescents exposed to mobile phone-like emissions
Mortazavi SM et al. (2012): Human short-term exposure to electromagnetic fields emitted by mobile phones decreases computer-assisted visual reaction time
Ng TP et al. (2012): Long-term digital mobile phone use and cognitive decline in the elderly
Vecchio F et al. (2012): Mobile phone emission modulates event-related desynchronization of alpha rhythms and cognitive-motor performance in healthy humans
Schmid MR et al. (2012): Sleep EEG alterations: effects of different pulse-modulated radio frequency electromagnetic fields
Sauter C et al. (2011): Effects of exposure to electromagnetic fields emitted by GSM 900 and WCDMA mobile phones on cognitive function in young male subjects
Luria R et al. (2009): Cognitive effects of radiation emitted by cellular phones: the influence of exposure side and time
Eltiti S et al. (2009): Short-term exposure to mobile phone base station signals does not affect cognitive functioning or physiological measures in individuals who report sensitivity to electromagnetic fields and controls
Cinel C et al. (2008): Does the use of mobile phones affect human short-term memory or attention?
Kleinlogel H et al. (2008): Effects of weak mobile phone - electromagnetic fields (GSM, UMTS) on event related potentials and cognitive functions
Unterlechner M et al. (2008): No effect of an UMTS mobile phone-like electromagnetic field of 1.97 GHz on human attention and reaction time
Arns M et al. (2007): Electroencephalographic, personality, and executive function measures associated with frequent mobile phone use
Regel SJ et al. (2007): Pulsed radio frequency radiation affects cognitive performance and the waking electroencephalogram
Fritzer G et al. (2007): Effects of short- and long-term pulsed radiofrequency electromagnetic fields on night sleep and cognitive functions in healthy subjects
Haarala C et al. (2007): Pulsed and continuous wave mobile phone exposure over left versus right hemisphere: effects on human cognitive function
Lass J et al. (2006): Are there modulated Electromagnetic Field Effects on Human Conscious Perception during Attentional Blink Test?
Keetley V et al. (2006): Neuropsychological sequelae of digital mobile phone exposure in humans
Preece AW et al. (2005): Effect of 902 MHz mobile phone transmission on cognitive function in children
Haarala C et al. (2004): 902 MHz mobile phone does not affect short term memory in humans
Lee TM et al. (2001): Effect on human attention of exposure to the electromagnetic field emitted by mobile phones
Koivisto M et al. (2000): Effects of 902 MHz electromagnetic field emitted by cellular telephones on response times in humans