Why some people can’t let go of fearful memories and how sleep and brain signals matter
Official title: Neural Basis of Individual Differences in Fear Extinction
Funded at Veterans Health Administration · NIH-11204589 · Data updated 2026-11-12
This project looks at how sleep problems and a brain chemical system (acetylcholine) can make it harder for people with trauma or PTSD to lose fearful memories.
Quick facts
| Grant type | NIH-funded research |
|---|---|
| Study type | NIH-funded research |
| Funding institution | Veterans Health Administration NIH-funded |
| Lab location | 1 site (Columbia, United States) |
| Project start | July 1, 2013 |
| Project end | September 30, 2028 |
| Funding year | 2026 |
| NIH project number | 5I01BX001374-11 |
| Project ID | NIH-11204589 on NIH RePORTER |
Who could benefit from this research
✓Could help
People with persistent fear after trauma or PTSD—especially veterans who have sleep disturbances—would be the most relevant group for the results of this work.
✕Less likely to help
Patients whose symptoms are unrelated to trauma-linked fear learning or who do not have sleep problems may not directly benefit from these findings.
What this research studies
From a patient point of view, the team uses rat models that show strong or weak fear responses to learn why some individuals have trouble 'unlearning' fear. They measure behaviors like freezing and vocalizations, manipulate sleep patterns, and study cholinergic brain pathways between the basal forebrain, prefrontal cortex, and amygdala. The goal is to link sleep disruption and cholinergic signaling to differences in fear extinction and safety learning that resemble PTSD. Findings aim to point to biological targets that could improve therapies for people who keep reliving traumatic fear.
Why it matters
Potential benefit: If successful, this work could reveal biological reasons some people resist exposure-based therapies and suggest new ways (sleep or brain-chemical targets) to help them benefit more from treatment.
How similar studies have gone: Prior animal and human studies link sleep and cholinergic signaling to fear extinction and exposure therapy outcomes, but using individual differences in these circuits as a target is a newer, more detailed approach.
Where this research is happening
-
Veterans Health Administration
Columbia, United States Active
Researchers
- Principal investigator: Wilson, Marlene a. — Veterans Health Administration
- Study coordinator: Wilson, Marlene a.
Related research
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Inflammation and fear learning in PTSD
This study looks at how a temporary inflammatory challenge affects fear extinction in people with and without PTSD to better understand how PTSD could be treated.
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Sleep-based brain wiring of fear memory in the amygdala
A study in people or animals will look at how sleep helps the amygdala store fear memories by using advanced brain imaging and genetic tools to understand memory changes.
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Spatial circuits in the prefrontal cortex that control fear and discrimination
Researchers are exploring how different parts of the prefrontal cortex help decide when to feel fear or not, with the goal of better understanding anxiety-related conditions.
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Understanding and improving fear and safety learning in OCD
A study at Yale will test brain-based methods to help adults with OCD improve safety learning and fear extinction during therapy.
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page.