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Stroke: Introduction and Types

Stroke: Introduction and Types

A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...

Regulation of Stroke Volume

Regulation of Stroke Volume

The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...

Hemorrhagic Stroke l: Introduction

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...

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Related Experiment Video

Updated: May 17, 2026

Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery

Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery

Published on: May 24, 2021

Do stroke models model stroke?

Philipp Mergenthaler¹, Andreas Meisel

¹Department of Experimental Neurology, Charité Universitätsmedizin Berlin, Charitéplatz 1, 10098 Berlin, Germany. philipp.mergenthaler@charite.de

Disease Models & Mechanisms

|November 2, 2012

Summary

This summary is machine-generated.

Translational stroke research faces significant roadblocks, leading to trial failures. Improving preclinical models to better reflect patient care and implementing rigorous testing, including Phase 3 trials, is crucial for advancing stroke therapies.

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Related Experiment Videos

Last Updated: May 17, 2026

Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery

Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery

Published on: May 24, 2021

Modeling Stroke in Mice - Middle Cerebral Artery Occlusion with the Filament Model

Modeling Stroke in Mice - Middle Cerebral Artery Occlusion with the Filament Model

Published on: January 6, 2011

Modeling Stroke in Mice: Focal Cortical Lesions by Photothrombosis

Modeling Stroke in Mice: Focal Cortical Lesions by Photothrombosis

Published on: May 6, 2021

Area of Science:

Neurology
Translational Medicine
Neuroscience

Background:

Stroke is a leading cause of death and disability globally.
Despite extensive basic research, many clinical trials for stroke treatments, particularly neuroprotection, have failed.
Key "translational roadblocks" include poor methodological standards, publication bias, and inadequate preclinical testing.

Purpose of the Study:

To review common preclinical stroke research models.
To discuss reasons for the failure of translational stroke research.
To propose remedies, including better modeling of patient care and advanced preclinical testing strategies.

Main Methods:

Introduction of commonly used preclinical stroke models.
Discussion of factors contributing to translational failure.
Review of potential solutions and remedies for improving preclinical research.

Main Results:

Current preclinical models often fail to adequately represent the complexity of stroke and patient care.
Incomplete preclinical testing and methodological weaknesses hinder the translation of basic science to clinical practice.
The concept of modeling "care" alongside the stroke disorder in preclinical settings is introduced.

Conclusions:

Preclinical stroke research requires improved modeling of the disorder and patient care.
Adopting methodologies similar to clinical testing, including Phase 3 randomized controlled preclinical trials, is essential.
Enhanced preclinical strategies are necessary before new stroke therapies advance to clinical testing.