Associations between solar and geomagnetic activity and cognitive function in the Normative Aging study

Authors: Liddie JM, Vieira CLZ, Coull BA, Sparrow D, Koutrakis P, Weisskopf MG

Year: 2024 Apr 16

Category: Environmental Science

Journal: Environ Int

DOI: 10.1016/j.envint.2024.108666

URL: https://www.sciencedirect.com/science/article/pii/S0160412024002526?via%3Dihub

Abstract

Overview

This study investigates the impact of solar and geomagnetic activities (SGA) on cognitive functions in elderly participants of the Normative Aging Study conducted from 1992 to 2013.

Methods

The research utilized logistic and linear regressions to analyze the relationship between sunspot numbers (SSN), Kp index (a measure of geomagnetic activity), and cognitive performance measured by the Mini-Mental State Examination (MMSE) and other cognitive tests.

Findings

  • Increase in same-day SSN and Kp index by one interquartile range was linked with 17% and 19% increased odds of lower MMSE scores, respectively.
  • Slight improvements in global cognitive scores were seen with rising SSN, but declines were observed in certain specific tests such as the backwards digit span test.

Conclusion

High periods of SGA correlate with fluctuations in cognitive abilities amongst elderly. The results suggest a varied impact of SGA on different cognitive functions. Further research focusing on cognitive decline and longer follow-up is recommended to understand underlying pathologies.

solar activity geomagnetic activity cognitive function aging Normative Aging Study melatonin autonomic nervous system
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