Alterations in Heart Rate Variability and Electroencephalogram during<scp>20‐Minute</scp>Extremely Low Frequency Electric Field Treatment in Healthy Men during the<scp>Eyes‐Open</scp>Condition

Shinba, Toshikazu; Nedachi, Takaki; Harakawa, Shinji

doi:10.1002/tee.23695

Cited by 6 publications

(1 citation statement)

References 32 publications

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“…The impact of constant and low-frequency electric fields on humans is also described in the literature. Exposure to 30 kV/m and 50 Hz EF increased alpha and theta EEG rhythms and a low-frequency HRV component [357,358]. However, some studies have not demonstrated any effects of such fields [359,360].…”

Section: Biological Effects Of Extremely-low-frequency Electrical Fieldsmentioning

confidence: 99%

Biological Effects of Magnetic Storms and ELF Magnetic Fields

Sarimov,

Serov,

Gudkov

2023

Biology

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Magnetic fields are a constant and essential part of our environment. The main components of ambient magnetic fields are the constant part of the geomagnetic field, its fluctuations caused by magnetic storms, and man-made magnetic fields. These fields refer to extremely-low-frequency (<1 kHz) magnetic fields (ELF-MFs). Since the 1980s, a huge amount of data has been accumulated on the biological effects of magnetic fields, in particular ELF-MFs. However, a unified picture of the patterns of action of magnetic fields has not been formed. Even though a unified mechanism has not yet been generally accepted, several theories have been proposed. In this review, we attempted to take a new approach to analyzing the quantitative data on the effects of ELF-MFs to identify new potential areas for research. This review provides general descriptions of the main effects of magnetic storms and anthropogenic fields on living organisms (molecular–cellular level and whole organism) and a brief description of the main mechanisms of magnetic field effects on living organisms. This review may be of interest to specialists in the fields of biology, physics, medicine, and other interdisciplinary areas.

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Section: Biological Effects Of Extremely-low-frequency Electrical Fieldsmentioning

confidence: 99%

Biological Effects of Magnetic Storms and ELF Magnetic Fields

Sarimov,

Serov,

Gudkov

2023

Biology

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Acute Treatment of 60‐Hz Electric Field Increases Parasympathetic Activity in Depressed Subjects: A Pilot Study Using Heart Rate Variability Analysis

Shinba,

Nedachi,

Harakawa

2024

IEEJ Transactions Elec Engng

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Research indicated that extremely low‐frequency (ELF) electric field (EF) treatment modifies autonomic activity in healthy subjects; however, the effects do not persist after the treatment. This study examined whether persistence of the effects is dependent on the baseline autonomic conditions. The depressed subjects are known to frequently exhibit autonomic dysregulation, and were enrolled in the present study to test this hypothesis. Autonomic activity was evaluated using heart rate variability (HRV) analysis. Heart rate (HR) was measured using R‐R intervals of the electrocardiogram in the resting state before and after the 20‐min ELF‐EF treatment (30 kV, 60 Hz) in the patients with major depressive disorder and in the control subjects, and HRV was analyzed using frequency‐domain power spectrum analysis of R‐R interval trend. Sham treatment was conducted in the control subjects but not in the patients due the ethical restriction. In the patients with depression, high‐frequency variation (HF) related to breathing‐dependent parasympathetic activity was low before the 60‐Hz EF treatment and increased to the control level after treatment. No effects of EF were found for low‐frequency variation (LF), LF/HF, and HR. The results indicated that acute 60‐Hz EF treatment increased parasympathetic activity in the depressed subjects, who showed a reduction in baseline parasympathetic activity. This study suggests that the effects of ELF‐EF treatment on autonomic activity are dependent on the baseline autonomic conditions. Future studies with larger sample sizes, incorporating sham treatment in the patients with depression, are needed to confirm these observations. © 2024 The Author(s). IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.

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