Brain Scans Revealed Shared Patterns in PTSD and TBI
Researchers identified distinct and shared spontaneous brain activity in veterans with PTSD and TBI using MRI data.
Updated on Sept. 26, 2026 in Mental Health
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A new study of 507 participants has mapped brain activity differences in those with PTSD and TBI. Findings reveal how these conditions alter spontaneous activity in specific regions of the brain compared to healthy individuals.
Why it matters
These results provide potential neurobiological markers that could allow for the development of more personalized treatment plans for patients suffering from both traumatic brain injuries and PTSD.
The study included 507 participants, consisting of 80 individuals with PTSD, 169 with TBI, and 258 healthy controls. Researchers utilized fractional amplitude of low-frequency fluctuations to measure spontaneous activity levels.
The details
Individuals with PTSD and TBI showed elevated activity in the bilateral amygdala and hippocampus compared to healthy controls. While the TBI group exhibited reduced activity in the ventromedial prefrontal cortex, the PTSD group showed no significant differences in that specific region.
Timeline
The research findings were published on September 26, 2026.
The Big Picture
This research aligns with the National Institute of Mental Health's Research Domain Criteria (RDoC) framework by prioritizing neurobiological markers over traditional symptom-based diagnoses. It represents an ongoing effort to bridge the gap between clinical trauma observations and measurable brain function.
These findings may eventually lead to more accurate diagnostic tools that distinguish between brain injury and PTSD-related activity. Patients may benefit from future treatment protocols tailored to these specific patterns of neural dysfunction.
The takeaway
Understanding the unique and overlapping brain signatures of PTSD and TBI is a vital step toward precision medicine in trauma care. Clinicians can eventually use these markers to identify which patients may benefit from specific, targeted therapeutic interventions.
Further reading
Learn more about the latest developments in neurobiological research within the Mental Health section.
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