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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 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...
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...

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A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
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Visual impairment in stroke patients--a review.

K M Sand1, A Midelfart, L Thomassen

  • 1Section for Neurology, Institute for Clinical Medicine, University of Bergen, Bergen, Norway.

Acta Neurologica Scandinavica. Supplementum
|November 30, 2012
PubMed
Summary

Post-stroke visual impairment affects 30% of patients, impacting daily life and rehabilitation outcomes. Visual rehabilitation focusing on coping strategies can improve patient function and quality of life.

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Area of Science:

  • Neurology
  • Ophthalmology
  • Rehabilitation Medicine

Background:

  • Approximately 30% of stroke survivors experience post-stroke visual impairment.
  • Common visual symptoms include hemianopia, neglect, diplopia, reduced visual acuity, ptosis, anisocoria, and nystagmus.
  • Visual impairment significantly impacts daily functioning, quality of life, and rehabilitation outcomes, often leading to social isolation.

Purpose of the Study:

  • To highlight the prevalence and impact of post-stroke visual impairment.
  • To emphasize the importance of thorough diagnosis and targeted rehabilitation strategies.
  • To explore the benefits of visual rehabilitation focused on coping strategies.

Main Methods:

  • Review of common post-stroke visual impairments.
  • Discussion of diagnostic approaches including eye examination and perimetry.
  • Analysis of the role of visual rehabilitation in patient recovery.

Main Results:

  • Post-stroke visual impairment is a frequent and disabling condition.
  • Early and accurate diagnosis is crucial for effective rehabilitation planning.
  • Visual rehabilitation interventions, particularly those emphasizing coping strategies, show promise for improving patient outcomes.

Conclusions:

  • Visual impairment is a significant, often underestimated, consequence of stroke.
  • A comprehensive approach to diagnosis and rehabilitation is essential for managing post-stroke visual deficits.
  • Targeted visual rehabilitation can mitigate the negative effects of visual impairment on daily functioning and quality of life.