Summary
Six weeks of daily 30-minute blue light therapy (BLT) in PTSD patients produced a significant reduction in anterior insula activation to fearful facial stimuli compared to amber light placebo, suggesting modulation of fear neurocircuitry. These findings support BLT as a simple, adjunctive non-pharmacological tool that could be integrated into existing PTSD treatment protocols.
Key Findings
- Both BLT and amber light placebo groups showed decreases in PTSD severity, but the difference was not statistically significant for left amygdala or vmPFC activation.
- BLT produced a statistically significant decrease in anterior insula activity in response to fearful facial stimuli compared to the amber light placebo group after 6 weeks.
- Treatment protocol: 30 minutes of daily blue light exposure over 6 weeks, with outcomes measured via fMRI using the Masked Affect Task (MAT).
Categories
Mood & Mental Wellness: Investigates blue light therapy as a non-pharmacological treatment for PTSD, measuring changes in fear neurocircuitry via fMRI.
Sleep & Circadian Health: Participants completed sleep diaries during six weeks of daily blue light therapy, connecting circadian light exposure to emotional processing in PTSD.
Author(s)
D Jecmen
Publication Year
2020
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