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Study Links Long Work Hours to Structural Brain Changes

Preliminary research suggests working over 52 hours weekly may alter brain regions tied to cognition and emotion, prompting calls for workplace reforms.

Side view of dedicated male professional working late at illuminated desk in coworking space
Image
A stock image of a woman sitting at a work desk with her hands over her eyes under her glasses.
(© Feng Yu - stock.adobe.com)

Overview

  • MRI scans of healthcare workers revealed increased brain volume in 17 regions, including areas linked to decision-making, memory, and emotional regulation.
  • The study found a 19% increase in the left caudal middle frontal gyrus volume among individuals working 52 or more hours weekly.
  • Researchers emphasize that the study is exploratory and cannot confirm whether the changes are caused by overwork or reflect predisposed traits.
  • Overwork is already associated with heightened risks of cardiovascular disease, mental health issues, and over 800,000 annual deaths globally, according to the International Labour Organization.
  • Experts and researchers urge further longitudinal studies and workplace policies to mitigate excessive working hours and address occupational health risks.