This in vitro study exposed HT-1080 human fibrosarcoma cells for 4 days to weak extremely low frequency magnetic fields (10 μT, 12–33 Hz) superimposed on a 45 μT static field. The authors report frequency- and amplitude-dependent increases or decreases in cell growth, including sharp inversions near 16.5 Hz with small parameter changes or reversal of the static field direction. Associated changes in membrane potential, intracellular calcium, and mitochondrial superoxide are presented as supporting a bioenergetic mechanism.

This review examines links between extremely low-frequency electromagnetic fields, especially the Schumann resonance at ~7.83 Hz, and biological regulation of bioelectricity. It describes proposed mechanisms involving calcium flux modulation and downstream effects on neural activity (including EEG) and circadian rhythms. The article presents both potential benefits from controlled ELF exposures (e.g., therapeutic applications) and potential harms from artificial EMFs disrupting key physiological processes, while emphasizing the need for further research.

This animal study trained adult zebrafish to perform a conditioned avoidance response to a visual cue. The visual cue was presented alone or together with an extremely low frequency sinusoidally changing magnetic field (0.3 Hz) at 0.015 mT or 0.06 mT. The abstract reports that the 0.06 mT magnetic field condition impaired learning performance and response behavior, suggesting a cross-modal distraction effect.