Acute effects of 50 Hz, 100 μT magnetic field exposure on visual duration discrimination at two different times of the day

Kazantzis, Nikolaos; Podd, John; Whittington, Craig

doi:10.1002/(sici)1521-186x(1998)19:5<310::aid-bem5>3.0.co;2-4

Cited by 16 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The design entailed having some of the electronic recording instrumentation in the exposure zone because of the nature of the recording. This concept was not entirely integrated into previous studies in other laboratories 3,4 due to the complexity involved. As the MF exposure facility itself is the interference source in the experiments, the MF cannot be eliminated at the origin.…”

Section: Introductionmentioning

confidence: 95%

Real-time recording of neuropsychophysiological parameters during 50 Hz magnetic field exposure

Sadafi

Cadusch

Wood

2005

Australas. Phys. Eng. Sci. Med.

View full text Add to dashboard Cite

In order to assess the possible effects of occupational levels of 50 Hz magnetic fields (MF) on human performance it is preferable to monitor performance during rather than subsequent to MF exposure. We previously reported studies of heart rate and cognitive behaviour where the issue of contamination was not a serious one. Our present study involves electrophysiological measures, which have a greater capacity to identify the effects and assist in localising them. The contamination of EEG signal by the MF exposure is clearly a problem in this type of study. Previous investigators have not reported these types of measurement concurrent with MF exposure due to the contamination difficulty; but this paper reports means of accomplishing this. Overall a combination of 12 methods for reducing pickup were employed. These were: 1) Distancing recording instruments from the MF source; 2) Shielding the devices and wiring; 3) Appropriate choice of cables; 4) Grounding the instrumentation; 5) Orientation of conduits; 6) Isolation of electrical mains power supplies; 7) Balancing the input impedances; 8) Applying a driven shield technique; 9) Improved electronics design incorporating pre-amplification and circuit impedance level control; 10) Analogue filtering; 11) Signal Averaging; and 12) Post acquisition digital filtering using frequency and time domain techniques.

show abstract

Section: Introductionmentioning

confidence: 95%

Real-time recording of neuropsychophysiological parameters during 50 Hz magnetic field exposure

Sadafi

Cadusch

Wood

2005

Australas. Phys. Eng. Sci. Med.

View full text Add to dashboard Cite

show abstract

Brief exposure to a 50 Hz, 100 μT magnetic field: Effects on reaction time, accuracy, and recognition memory

Podd

Abbott

Kazantzis

et al. 2002

Bioelectromagnetics

Self Cite

View full text Add to dashboard Cite

The present study investigated both the direct and delayed effects of a 50 Hz, 100 microT magnetic field on human performance. Eighty subjects completed a visual duration discrimination task, half being exposed to the field and the other half sham exposed. The delayed effects of this field were also examined in a recognition memory task that followed immediately upon completion of the discrimination task, Unlike our earlier studies, we were unable to find any effects of the field on reaction time and accuracy in the visual discrimination task. However, the field had a delayed effect on memory, producing a decrement in recognition accuracy. We conclude that after many years of experimentation, finding a set of magnetic field parameters and human performance measures that reliably yield magnetic field effects is proving elusive. Yet the large number of significant findings suggests that further research is warranted.

show abstract

Human electrophysiological and cognitive effects of exposure to ELF magnetic and ELF modulated RF and microwave fields: A review of recent studies

Cook

Thomas

Prato

2002

Bioelectromagnetics

112

View full text Add to dashboard Cite

The investigation of weak (<500 microT), extremely low frequency (ELF, 0-300 Hz) magnetic field (MF) exposure upon human cognition and electrophysiology has yielded incomplete and contradictory evidence that MFs interact with human biology. This may be due to the small number of studies undertaken examining ELF MF effects upon the human electroencephalogram (EEG), and the associated analysis of evoked related potentials (ERPs). Relatively few studies have examined how MF exposure may affect cognitive and perceptual processing in human subjects. The introduction of this review considers some of the recent studies of ELF MF exposure upon the EEG, ERPs and cognitive and perceptual tasks. We also consider some of the confounding factors within current human MF studies and suggest some new strategies for further experimentation.

show abstract

Acute effects of 50 Hz, 100 μT magnetic field exposure on visual duration discrimination at two different times of the day

Cited by 16 publications

References 11 publications

Real-time recording of neuropsychophysiological parameters during 50 Hz magnetic field exposure

Real-time recording of neuropsychophysiological parameters during 50 Hz magnetic field exposure

Brief exposure to a 50 Hz, 100 μT magnetic field: Effects on reaction time, accuracy, and recognition memory

Human electrophysiological and cognitive effects of exposure to ELF magnetic and ELF modulated RF and microwave fields: A review of recent studies

Contact Info

Product

Resources

About