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Related Concept Videos

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...
Stroke: Introduction and Types01:29

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...
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...
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.

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Related Experiment Video

Updated: Jul 2, 2026

A Murine Model of Subarachnoid Hemorrhage
07:40

A Murine Model of Subarachnoid Hemorrhage

Published on: November 21, 2013

[Experimental hemorrhagic stroke].

M D Gaevyĭ, L E Nazarova, L M GaevAaia

    Patologicheskaia Fiziologiia I Eksperimental'Naia Terapiia
    |August 30, 2008
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a new method to induce hemorrhagic stroke in rats using a specialized centrifuge. This technique simulates hypertensive stroke conditions without anesthesia, offering a novel research tool.

    Related Experiment Videos

    Last Updated: Jul 2, 2026

    A Murine Model of Subarachnoid Hemorrhage
    07:40

    A Murine Model of Subarachnoid Hemorrhage

    Published on: November 21, 2013

    Area of Science:

    • Neurology
    • Experimental Medicine
    • Physiology

    Context:

    • Developing reliable animal models for stroke research is crucial.
    • Existing models often involve anesthesia or invasive procedures.
    • Hypertensive stroke is a significant subtype with distinct pathophysiology.

    Purpose:

    • To present a novel, non-anesthetic method for inducing experimental hemorrhagic stroke.
    • To create a hypertensive stroke model in rats using controlled gravity overload.
    • To establish a reproducible technique for studying stroke mechanisms.

    Summary:

    • A technique using a centrifuge to induce caudocranial gravity overload in non-anesthetized rats is described.
    • This method reliably produces experimental hemorrhagic stroke of a hypertensive type.
    • The experimental setup allows for controlled and repeatable induction of stroke.

    Impact:

    • Provides a valuable new tool for investigating the pathogenesis of hypertensive hemorrhagic stroke.
    • Facilitates research into potential therapeutic interventions for this stroke subtype.
    • Enables studies on the physiological responses to acute hypertensive stress.