HD-tDCS over the dorsal medial prefrontal cortex reduces PSQI scores and improves sleep onset latency and sleep efficiency in chronic insomnia patients
A 10-day regimen of active high-definition transcranial direct current stimulation (HD-tDCS) targeting the bilateral DMPFC significantly decreased Pittsburgh Sleep Quality Index (PSQI) scores compared to sham stimulation in chronic insomnia patients. Exploratory polysomnography findings also showed improvements in sleep onset latency (SOL) and sleep efficiency (SE) after active treatment.
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HD-tDCS over the dorsal medial prefrontal cortex 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 dorsal medial prefrontal cortex 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 HD-tDCS applied over DMPFC modulates cortical excitability
- ▸DMPFC stimulation influences sleep-wake regulation circuits
- ▸Improved sleep promotion and daytime sleepiness recovery
- ▸Result: Reduced PSQI scores and improved SOL and SE
Who Might Benefit
Evidence fit by population:
- ▸55 patients with chronic insomnia
Recommended Dose
10 daily sessions (duration per session not specified in abstract)
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Small sample size (n=55) limits generalizability
- ▸No long-term follow-up data reported
- ▸Lack of reported effect sizes or confidence intervals
- ▸No safety data beyond the acute 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 treatment consisted of 10 daily sessions, though the exact duration of each session is not specified in the abstract.
Did HD-tDCS affect sleep stages?▼
No, the study did not observe any effects of tDCS on sleep stage ratio 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 it requires replication and additional safety data before clinical use.
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