HD-tDCS over the DMPFC reduces PSQI scores and improves sleep onset latency and sleep efficiency in chronic insomnia patients
A 10-day course of active high-definition transcranial direct current stimulation (HD-tDCS) targeting the dorsal medial prefrontal cortex significantly decreased Pittsburgh Sleep Quality Index (PSQI) scores compared to sham stimulation in chronic insomnia patients. Exploratory polysomnography measures also showed improvements in sleep onset latency and sleep efficiency after active treatment.
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HD-tDCS over the DMPFC reduces PSQI scores and improves sleep onset latency and sleep efficiency in chronic insomnia patients The current body of evidence comprises 1 study, including 1 randomized controlled trial. EvidenceHub rates the overall confidence at 42/100 (low).
The Claim
HD-tDCS over the DMPFC reduces PSQI scores and improves sleep onset latency and sleep efficiency in chronic insomnia patients
This conclusion is most relevant to: 55 patients with chronic insomnia.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Effects of high-definition transcranial direct current stimulation for the treatment of chronic insomnia: a randomized, double-blind, controlled trial. (Scientific reports, 2025) —
How It Works
The proposed biological pathway:
- ▸Anode stimulation applied over DMPFC (Fz) modulates prefrontal cortical excitability
- ▸Modulation of DMPFC may enhance sleep-promoting neural circuits
- ▸Reduction in hyperarousal associated with chronic insomnia
- ▸Result: Improved subjective sleep quality and objective sleep onset/efficiency
Who Might Benefit
Evidence fit by population:
- ▸55 patients with chronic insomnia
Recommended Dose
10 daily sessions of HD-tDCS
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Small sample size (n=55) limits generalizability
- ▸Exploratory nature of PSG findings requires replication
- ▸No long-term follow-up data reported
- ▸Lack of safety data beyond the immediate intervention period
Frequently Asked Questions
What is HD-tDCS?▼
High-definition transcranial direct current stimulation is a non-invasive brain stimulation technique that uses multiple small electrodes to deliver targeted electrical currents to specific brain regions.
How long did the treatment last?▼
The active treatment consisted of 10 daily sessions of HD-tDCS.
Did HD-tDCS affect sleep stages?▼
No significant effects on sleep stage ratio were observed after the intervention.
Is HD-tDCS a replacement for standard insomnia treatments?▼
The authors suggest it may be a promising supplement to medication and cognitive behavioral therapy, but further replication and safety data are needed.
References
- 1.Li J, Li A, Jiao J, Hu K, Jiang Y, Hu X, Wang K, Chen X, Xie C. “Effects of high-definition transcranial direct current stimulation for the treatment of chronic insomnia: a randomized, double-blind, controlled trial..” Scientific reports, 2025. PMID: 40695876 DOI: 10.1038/s41598-025-09304-4