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Generalized Anxiety Disorder

Generalized Anxiety Disorder

Generalized Anxiety Disorder (GAD) is a chronic condition characterized by excessive and uncontrollable worry that persists for at least six months, significantly interfering with daily functioning. Unlike situational anxiety, which arises in response to specific stressors, GAD often occurs without a clear cause. Individuals may experience disproportionate worry about work, health, or relationships. For instance, a person might continuously fear poor health despite normal medical evaluations or...

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A Protocol for Transcranial Photobiomodulation Therapy in Mice

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Published on: November 18, 2018

Transcranial Photobiomodulation with Near-Infrared Light for Generalized Anxiety Disorder: A Pilot Study.

Marco Maiello^1,2,3, Olivia M Losiewicz^1,2, Eric Bui^1,2

¹Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts.

Photobiomodulation, Photomedicine, and Laser Surgery

|October 25, 2019

Summary

Transcranial photobiomodulation (t-PBM) using near-infrared light (NIR) significantly reduced anxiety symptoms in individuals with generalized anxiety disorder (GAD). This noninvasive treatment also improved sleep quality, showing promise as a new therapy for GAD.

Keywords:

LLLT NIR generalized anxiety disorder low-level light therapy near-infrared neuromodulation photobiomodulation transcranial

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Area of Science:

Neuroscience
Biomedical Engineering
Psychiatry

Background:

Generalized Anxiety Disorder (GAD) is a prevalent mental health condition with limited treatment options.
Transcranial photobiomodulation (t-PBM) using near-infrared light (NIR) is an emerging noninvasive neuromodulation technique.
Preliminary studies suggest t-PBM may have anxiolytic effects.

Purpose of the Study:

To evaluate the anxiolytic efficacy of t-PBM with NIR in patients diagnosed with GAD.
To assess the impact of t-PBM on anxiety severity, overall clinical impression, and sleep quality.

Main Methods:

An 8-week open-label study involving 15 subjects with GAD.
Daily self-administration of t-PBM using an LED-cluster headband (830 nm NIR, 20 min/day).
Outcome measures included Hamilton Anxiety Scale (SIGH-A), Clinical Global Impressions-Severity (CGI-S), and Pittsburgh Sleep Quality Index (PSQI) scores.

Main Results:

Significant reductions in SIGH-A scores (p < 0.001) and CGI-S scores (p < 0.001) were observed.
A large effect size (Cohen's d = 1.47 for SIGH-A, 2.04 for CGI-S) indicated substantial treatment impact.
Significant improvements in sleep quality as measured by the PSQI were also noted.

Conclusions:

t-PBM with NIR demonstrates potential as a safe and effective alternative treatment for GAD.
The treatment was well-tolerated, with no serious adverse events reported.
Further large-scale, randomized, double-blind, sham-controlled trials are warranted to confirm these findings.