25 Years After 9/11, Study Finds Lasting Impact on Responders’ Brains
New AI brain scans reveal 9/11 responders with PTSD are aging faster—25 years on, the toll is still emerging.
As the 25th anniversary of the 9/11 attacks nears, a professor is examining how the event has affected the brains of first responders. According to a study published in a psychiatric journal, these individuals may be experiencing accelerated brain aging. Dr. Roberto Lucchini, an Environmental Health Sciences professor at Florida International University, stated that the complexity of exposure over time could lead to cognitive decline, resulting in memory loss and difficulty concentrating.
Lucchini emphasized that the vivid sensory memories from the event, which responders have repeatedly recounted, can cause long-lasting psychological trauma, even among trained professionals. A study conducted in late 2025 found a link between post-traumatic stress disorder (PTSD) and accelerated brain aging among World Trade Center responders who participated in rescue and recovery efforts.
Using an artificial intelligence model trained on over 11,000 MRI scans, researchers from the Icahn School of Medicine at Mount Sinai estimated each participant's biological brain age. Those with PTSD had brains that appeared, on average, about three years older than their actual age, while those without PTSD showed slightly younger brain ages.
The longer a responder worked at Ground Zero, the stronger the connection between PTSD and accelerated brain aging. Approximately 23% of those who took part in rescue and recovery operations experienced persistent, clinically significant PTSD. Dr. Lucchini, who has studied the long-term health of 9/11 responders, highlighted the combination of hazardous exposure and psychological trauma faced by these individuals.
He noted that trauma can age the brain and that access to care significantly impacts recovery. The study's researchers propose that brain age could serve as a new biomarker to monitor neurological health in individuals exposed to severe trauma and call for ongoing monitoring and support for World Trade Center responders as they age.
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