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Updated: May 3, 2026

Gathering Self-Initiated Rat Behavioral Data to Characterize Post-Stroke Deficits
Published on: March 15, 2024
[Circadian rhythm and stroke]
1Division of Neurology and Gerontology, Department of Internal Medicine, School of Medicine, Iwate Medical University.
Insights
Circadian rhythm disruptions can lead to stroke by affecting blood pressure and coagulation. Understanding these biological rhythms is crucial for stroke prevention and treatment.
Area of Science:
- Neuroscience
- Cardiovascular Science
- Sleep Medicine
Context:
- Stroke incidence is linked to circadian rhythm alterations.
- Pathologically reduced circadian variation is a known stroke risk factor.
- Both ischemic and hemorrhagic strokes share common pathophysiological patterns related to circadian factors.
Purpose:
- To explore the intricate relationship between circadian rhythms and stroke.
- To identify key circadian rhythm components influencing stroke incidence.
- To highlight the role of blood pressure and coagulation rhythms in cerebrovascular events.
Summary:
- Circadian rhythms, influenced by both internal biological clocks and external factors, play a significant role in stroke.
- Key factors include vascular tone, coagulation, blood pressure, physical activity, and stress.
- The temporal patterns of blood pressure and coagulation are particularly critical for cerebral vessel health.
Impact:
- Provides insights into the pathophysiology of stroke.
- Suggests potential chronotherapeutic strategies for stroke prevention.
- Emphasizes the importance of considering circadian health in neurological and cardiovascular care.
Abstract:
Studies on the relationship between stroke incidence and alterations of circadian rhythm are scarce, while pathologically reduced or abolished circadian variation has been described to cause stroke since a long time ago. Although ischemic and hemorrhagic strokes are different entities and are characterized by different pathophysiological mechanisms, they share an identical pattern. A constellation of endogenous circadian rhythms and exogenous cyclic factors are involved. The staging of the circadian rhythms in vascular tone, coagulation balance including platelet function, and blood pressure plus temporal patterns in posture, physical activity, emotional stress, autonomic function, and medication effects play central and/or triggering roles. Features of the circadian rhythm of blood pressure, in terms of their chronic and acute effects on cerebral vessels, and of coagulation are especially important.
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