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Ischemic Stroke ll: Pathophysiology

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...

Ischemic Stroke l: Introduction

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.

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...

Hemorrhagic Stroke ll: Pathophysiology

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...

Transient Ischemic Attack l: Introduction

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...

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...

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Related Experiment Video

Updated: May 23, 2026

A Middle Cerebral Artery Occlusion Technique for Inducing Post-stroke Depression in Rats

A Middle Cerebral Artery Occlusion Technique for Inducing Post-stroke Depression in Rats

Published on: May 22, 2019

Falls after stroke.

Frances A Batchelor¹, Shylie F Mackintosh, Catherine M Said

¹National Ageing Research Institute, Royal Melbourne Hospital, Parkville, Victoria, Australia. f.batchelor@nari.unimelb.edu.au

International Journal of Stroke : Official Journal of the International Stroke Society

|April 13, 2012

Summary

This summary is machine-generated.

Falls are a significant problem for stroke survivors across all recovery phases. More research is needed to develop effective fall prevention strategies for people with stroke.

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Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke

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A Middle Cerebral Artery Occlusion Technique for Inducing Post-stroke Depression in Rats

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Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke

Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke

Published on: June 6, 2025

Area of Science:

Neurology
Rehabilitation Medicine
Gerontology

Background:

Falls are a frequent and serious complication for stroke survivors, impacting independence and quality of life.
Post-stroke impairments like reduced strength, balance deficits, and visual problems contribute to high fall rates.
Existing fall risk factors are often exacerbated by stroke, leading to a complex multifactorial problem.

Purpose of the Study:

To review the prevalence and consequences of falls in the stroke population.
To identify key risk factors associated with falls after stroke.
To summarize existing evidence from randomized controlled trials (RCTs) on fall prevention interventions for stroke survivors.

Main Methods:

Literature review of falls in stroke survivors.
Analysis of risk factors contributing to falls post-stroke.
Synthesis of findings from randomized controlled trials focused on fall prevention in this demographic.

Main Results:

Falls occur across acute, rehabilitative, and chronic stages post-stroke.
Consequences range from minor injuries to death, alongside functional decline and fear of falling.
Evidence from RCTs on fall prevention interventions in stroke is currently limited.

Conclusions:

Falls represent a major challenge for stroke recovery and long-term well-being.
A comprehensive understanding of pre-existing and stroke-related risk factors is crucial.
High-quality research is urgently needed to develop and validate effective fall prevention strategies for all phases of stroke recovery.