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Diaschisis as Cerebello-Cortical Loop Dysfunction in Acute Ischemic Stroke: A Network Framework for Outcome
Nannan Sheng1, Qi Jia1, Gilles Naeije1
1Neurology Department, Université Libre de Bruxelles, Cliniques Universitaires de Bruxelles, Hôpital Erasme, 1070 Bruxelles, Belgium.
Brain Sciences
|June 26, 2026
Summary
Stroke outcomes vary due to brain network disruption, not just lesion location. Diaschisis, a disruption in cerebello-cortical loops, explains this network-level impairment and outcome heterogeneity after ischemic stroke.
Area of Science:
- Neuroscience
- Neurology
- Systems Neuroscience
Background:
- Clinical outcomes after acute ischemic stroke are highly variable, challenging traditional lesion-based models.
- Emerging evidence suggests stroke impacts distributed brain networks, but mechanisms remain unclear.
- Focal ischemia's transition to large-scale dysfunction needs mechanistic explanation.
Purpose of the Study:
- To propose diaschisis as a central mechanism linking focal ischemic injury to network-level impairment.
- To reframe diaschisis as a disruption of cerebello-cortical loop dynamics.
- To explain inter-individual variability in stroke outcomes through a network-centric lens.
Main Methods:
- Review of functional imaging, connectomics, and cerebellar physiology.
- Conceptualization of diaschisis within cerebello-cortical loop framework.
- Analysis of factors influencing outcome variability: lesion characteristics, brain reserve, network vulnerability, and diaschisis extent.
Main Results:
- Diaschisis may represent disrupted cerebello-cortical loop dynamics, not just remote effects.
- Focal ischemia can trigger widespread dysfunction via these vulnerable polysynaptic circuits.
- Functional suppression of cerebellar output, even without structural damage, contributes to network dysfunction.
Conclusions:
- A circuit-based perspective explains stroke outcome variability by shifting focus from lesion localization to network dynamics.
- Understanding diaschisis as cerebello-cortical loop dysfunction offers new prognostic and therapeutic targets.
- Targeting network restoration may improve post-stroke recovery.
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