Discovery of Frequency-Specific Embryonic Brain Sensitivity to Solar-Geomagnetic Activity

We report the first evidence of frequency-specific sensitivity of human brain structures to solar and geomagnetic activity during embryonic neurogenesis.Analysis of six individuals with precisely defined conception windows revealed distinct, structure-dependent resonance patterns:(1) early limbic regions (amygdala, hippocampus, ventral striatum, anterior insula) respond to burst- and delta-range variations (7–14 days, AE/Bz/SYM-H);(2) late associative networks (pSTS/TPJ, DMN) exhibit selective tuning to infra-low tonal oscillations (21–45 days, Vsw);and (3) prefrontal regions (ACC, mPFC) are co-modulated by carrier–modulator coupling between solar wind velocity and SYM-H with a 2–4 h phase lag.Across subjects, circadian vulnerability peaks consistently occurred at 02–05 LT, showing 83–100% reproducibility.These findings suggest that the developing human brain selectively encodes external electromagnetic rhythms according to its intrinsic developmental tempo.The study establishes research priority for structure-specific, frequency-dependent coupling between space weather and human brain development solar activity, neurogenesis, prenatal programming, geomagnetic field, OMNI, SSN, chronobiology, brain development