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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...

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.

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Updated: Jun 6, 2026

Quantification of Neurovascular Protection Following Repetitive Hypoxic Preconditioning and Transient Middle Cerebral Artery Occlusion in Mice

Quantification of Neurovascular Protection Following Repetitive Hypoxic Preconditioning and Transient Middle Cerebral Artery Occlusion in Mice

Published on: May 4, 2015

[Neuroprotective effect of transient ischemic attack].

Yannick Béjot¹, Corinne Aboa-Eboulé, Christine Marie

¹Université de Bourgogne, CHU de Dijon, Registre dijonnais des AVC, faculté de médecine de Dijon, IFR 100 Santé-STIC, EA 4184, service de neurologie, Réseau StrokAvenir, 21079 Dijon, France. ybejot@yahoo.fr

Presse Medicale (Paris, France : 1983)

|November 30, 2010

Summary

Transient ischemic attack (TIA) offers a protective effect against future strokes by inducing endogenous neuroprotection. This phenomenon, known as ischemic tolerance, improves patient prognosis after a stroke.

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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Area of Science:

Neuroscience
Neurology
Stroke Research

Context:

Transient ischemic attack (TIA) is a significant risk factor for ischemic stroke.
Approximately 7-25% of ischemic stroke patients have a prior TIA history.
The risk of stroke within 3 months post-TIA is around 15%.

Purpose:

To explore the paradox of TIA history improving stroke prognosis.
To investigate the neuroprotective mechanisms of ischemic tolerance induced by TIA.
To identify therapeutic targets for stroke prevention based on TIA's protective effects.

Summary:

Epidemiological data reveal better functional and vital prognoses in ischemic stroke patients with a TIA history, especially following recent, short, or non-lacunar TIAs.
TIA appears to trigger endogenous neuroprotection via the ischemic tolerance phenomenon, mitigating neurodegeneration from subsequent severe cerebral ischemia.
The underlying mechanisms involve complex, multifactorial changes in cellular gene expression, metabolic and signaling pathways, and enzymatic activity.

Impact:

Understanding TIA's neuroprotective role opens avenues for novel therapeutic strategies.
Targeting the ischemic tolerance phenomenon could lead to new treatments for stroke prevention.
This research highlights the potential for leveraging TIA's protective effects to improve stroke outcomes.