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Related Concept Videos

Ischemic Stroke l: Introduction01:15

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.
Ischemic Stroke ll: Pathophysiology01:15

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...
Hemorrhagic Stroke ll: Pathophysiology01:29

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...
Hemorrhagic Stroke l: Introduction01:17

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...
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...
Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...

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Related Experiment Video

Updated: Jul 3, 2026

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
11:12

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects

Published on: September 18, 2012

[Clinico-neurovisual comparisons in primary ischemic stroke].

O V Tkachenko, I O Ts'okha

    Likars'Ka Sprava
    |August 1, 2008
    PubMed
    Summary

    This study correlates initial brain imaging findings with neurological deficits in first-time ischemic stroke patients. It details how acute ischemic changes relate to the severity and progression of neurological impairment.

    Area of Science:

    • Neurology
    • Neuroimaging
    • Clinical Neuroscience

    Background:

    • Ischemic stroke is a leading cause of neurological disability.
    • Understanding the relationship between brain lesions and functional deficits is crucial for patient management.
    • Early neuroimaging findings can predict stroke outcomes.

    Purpose of the Study:

    • To correlate clinical neurological deficiency with neurovisual research findings in first-time ischemic stroke patients.
    • To analyze the relationship between structural brain changes and neurological deficits during the acute phase of ischemic stroke.

    Main Methods:

    • Correlation research comparing clinical data (neurological deficiency severity) with neurovisual research data.
    • Direct neurovisual research to assess brain structural changes (e.g., ischemic center volume, presence of lesions).

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    Transient Middle Cerebral Artery Occlusion Model of Stroke
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    Transient Middle Cerebral Artery Occlusion Model of Stroke

    Published on: August 11, 2023

    Stereological and Flow Cytometry Characterization of Leukocyte Subpopulations in Models of Transient or Permanent Cerebral Ischemia
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    Stereological and Flow Cytometry Characterization of Leukocyte Subpopulations in Models of Transient or Permanent Cerebral Ischemia

    Published on: December 28, 2014

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    Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
    11:12

    Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects

    Published on: September 18, 2012

    Transient Middle Cerebral Artery Occlusion Model of Stroke
    05:32

    Transient Middle Cerebral Artery Occlusion Model of Stroke

    Published on: August 11, 2023

    Stereological and Flow Cytometry Characterization of Leukocyte Subpopulations in Models of Transient or Permanent Cerebral Ischemia
    12:42

    Stereological and Flow Cytometry Characterization of Leukocyte Subpopulations in Models of Transient or Permanent Cerebral Ischemia

    Published on: December 28, 2014

  • Dynamic assessment of neurological deficiency during the acute period of ischemic stroke.

    • Main Results:

    • Presents features of the relationship between structural brain changes and neurological deficits.
    • Details specific neurovisual findings (e.g., ischemic center volume, lesion characteristics) and their correlation with neurological impairment.
    • Shows the changes in neurological deficiency within the acute phase of ischemic stroke.

    Conclusions:

    • Structural brain changes identified through neurovisual research are closely linked to the severity of neurological deficiency in ischemic stroke.
    • The dynamics of neurological deficits in the acute phase are influenced by the characteristics of the ischemic brain changes.