---
title: Do brain-like experiences increase when geomagnetic activity is high in women with PMS?
description: In this very small study, 5 out of 12 women (41%) showed increases in complex partial epileptic-like experiences when geomagnetic activity was high. However,
url: https://niyora.com/research/papers/elevations-of-complex-partial-epileptic-like-experiences-during-increased-1998/
---

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- Do brain-like experiences increase when geomagnetic activity is high in women with PMS?

Survey study, 1998

# Do brain-like experiences increase when geomagnetic activity is high in women with PMS?

In this very small study, 5 out of 12 women (41%) showed increases in complex partial epileptic-like experiences when geomagnetic activity was high. However, the sample is too small to be confident about this finding.

 Early or limited evidence

12 women reporting PMS

## What they did

12 women with PMS recorded whether they had complex partial epileptic-like experiences every second day for at least two months. Researchers checked whether these experiences increased when daily geomagnetic activity exceeded 40 nT.

## What they found

5 out of 12 women (41%) displayed significant increases (effect sizes 6% to 17%) in these experiences when geomagnetic activity exceeded 40 nT. The results support the hypothesis that environmental magnetic factors might enhance these experiences.

## What it means for you

Environmental factors like geomagnetic activity might affect some women's symptoms. However, we cannot be confident because the study is extremely small with no control group.

5 of 12 (41%)

Women showing increases

6% to 17%

Effect sizes

40 nT

Geomagnetic threshold

## About the study

Original title Elevations of complex partial epileptic-like experiences during increased geomagnetic activity for women reporting "premenstrual syndrome" Authors Renton CM, Persinger MA Journal Perceptual and motor skills Year 1998 Study design Survey study Participants 12 What was tested None Read the paper [doi.org/10.2466/pms.1998.86.1.240](https://doi.org/10.2466/pms.1998.86.1.240)

## Topics

[Premenstrual syndrome (PMS)](https://niyora.com/research/topics/condition-pms/)[Epilepsy](https://niyora.com/research/topics/comorbidity-epilepsy/)

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