Focal mediodorsal thalamus stroke impairs sleep-wake stability, thalamocortical oscillations, and working memory, and auditory stimulation restores these deficits in mice
Optically guided photothrombotic stroke of the mediodorsal thalamus in awake mice increased wake-NREMS-wake transitions, elevated slow-wave activity during wakefulness, and reduced frontal slow waves and spindles during NREMS compared to sham controls (P=0.03 to P<0.001). These changes were accompanied by impaired working memory and pain hypersensitivity (P<0.001). Daily 1-Hz auditory stimulation during NREMS-rich periods normalized sleep continuity, restored SW-spindle coupling, and improved working memory to sham levels.
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Focal mediodorsal thalamus stroke impairs sleep-wake stability, thalamocortical oscillations, and working memory, and auditory stimulation restores these deficits in mice The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 26/100 (low).
The Claim
Focal mediodorsal thalamus stroke impairs sleep-wake stability, thalamocortical oscillations, and working memory, and auditory stimulation restores these deficits in mice
This conclusion is most relevant to: Male C57BL/6JRj mice aged 10-16 weeks (8 cohorts, n=8-12/group).
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Optical Ministroke Reveals Dual-Role Frontal Thalamocortical Networks in Sleep Quality and Memory. (Stroke, 2026) —
How It Works
The proposed biological pathway:
- ▸Focal MD lesion disrupts thalamocortical slow-wave and spindle generation
- ▸Impaired SW-spindle coupling and increased sleep-wake transitions
- ▸Reduced MD-anterior cingulate cortex connectivity to parvalbumin-positive interneurons
- ▸Auditory stimulation restores SW-spindle coupling, sleep continuity, and cognitive function
Who Might Benefit
Evidence fit by population:
- ▸Male C57BL/6JRj mice aged 10-16 weeks (8 cohorts, n=8-12/group)
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Study conducted in male mice only, limiting generalizability to females
- ▸Small sample sizes per cohort (n=8-12) and potential selection bias from exclusion of animals with poor signals or incomplete testing
Frequently Asked Questions
What is the optically guided photothrombotic stroke model?▼
It is a method to induce focal lesions in deep brain structures like the mediodorsal thalamus in awake, freely behaving mice using intraperitoneal Rose Bengal and targeted 532-nm light, avoiding anesthesia.
How did auditory stimulation affect sleep and memory after thalamic stroke?▼
Daily 1-Hz auditory stimulation during NREMS-rich periods normalized sleep continuity, restored slow-wave-spindle coupling, and improved working memory to sham levels in mice with MD strokes.
What were the main outcomes measured in this study?▼
Primary outcomes included longitudinal sleep-wake features (e.g., transitions, slow-wave activity, spindles), working memory (Y-maze errors), and pain sensitivity over 20 days.
Does this study have human relevance?▼
Yes, the authors note that the observed deficits recapitulate hallmark features of paramedian thalamic infarcts in humans, suggesting translational potential.
References
- 1.Borsa M, Lenzi I, Obrist C, Rusterholz T, Bassetti CL, Adamantidis A, Gutierrez C. “Optical Ministroke Reveals Dual-Role Frontal Thalamocortical Networks in Sleep Quality and Memory..” Stroke, 2026. PMID: 42454410 DOI: 10.1161/STROKEAHA.126.056284