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Related Concept Videos

Stroke: Introduction and Types01:29

Stroke: Introduction and Types

2
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...
2
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

1
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...
1
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

3
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...
3
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

3
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.
3
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

2
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...
2
Transient Ischemic Attack l: Introduction01:26

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...

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Related Experiment Video

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3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
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Dissecting the association between migraine and stroke.

Andrea M Harriott1, Kevin M Barrett

  • 1Department of Neurology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL, 32224, USA, Harriott.andrea@mayo.edu.

Current Neurology and Neuroscience Reports
|February 6, 2015
PubMed
Summary

Migraine, a neurological disorder, is linked to increased stroke risk. Understanding the diverse mechanisms connecting migraine and stroke is crucial for developing new prevention and treatment strategies.

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Area of Science:

  • Neurology
  • Vascular Medicine

Background:

  • Migraine is a common, disabling neurological disorder characterized by cortical excitation and trigeminovascular sensitization.
  • Migraineurs face a significant risk of vascular disease, with a notable association with acute ischemic stroke, especially in young women with migraine with aura.

Purpose of the Study:

  • To examine the pathobiology underlying the association between migraine and stroke.
  • To assimilate diverse pathomechanisms into a coherent understanding of migraine-related stroke risk.

Main Methods:

  • Review of existing literature on migraine and stroke pathophysiology.
  • Analysis of proposed mechanisms including vasospasm, endothelial injury, platelet aggregation, cortical spreading depression, carotid dissection, genetic factors, and vascular risk factors.

Main Results:

  • The association between migraine and stroke is multifactorial, reflecting the heterogeneous nature of migraine.
  • Several putative mechanisms contribute to migraine-related stroke risk, including vascular and neurological factors.

Conclusions:

  • A comprehensive understanding of the diverse mechanisms linking migraine and stroke is essential.
  • This knowledge will guide future research and the development of novel prevention and treatment strategies for both conditions.