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Related Concept Videos

Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

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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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Hemorrhagic Stroke l: Introduction01:17

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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...
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Visual Agnosia01:12

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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Ischemic Stroke ll: Pathophysiology01:15

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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...
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Visual hemifield loss in thalamic hematoma.

Prakashchand Agarwal1, Saroj Gupta1, Sushil Jindal1

  • 1Department of Opthalmology, People's College of Medical Sciences.

Annals of Neurosciences
|September 11, 2014
PubMed
Summary
This summary is machine-generated.

A large thalamic hematoma, a rare brain bleed, caused visual field deficits but no motor or sensory issues in a hypertensive patient. This unique case highlights the varied presentations of thalamic hemorrhages.

Keywords:
HematomaHemianopiaHemorrhageThalamus

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Area of Science:

  • Neurology
  • Neuroimaging
  • Vascular Neurology

Background:

  • Thalamic hematomas are uncommon intracranial hemorrhages.
  • Hypertension is a significant risk factor for spontaneous intracerebral hemorrhage.
  • Thalamic hemorrhages often present with motor, sensory, or cognitive deficits.

Observation:

  • A 45-year-old hypertensive patient presented with sudden severe headache, vomiting, visual loss, and confusion.
  • Brain imaging revealed a large hematoma in the left thalamus.
  • The patient exhibited disorientation and right homonymous hemianopia, with no motor or sensory deficits.

Findings:

  • The patient's headache and cognitive functions improved with intracranial pressure management and supportive care.
  • The unique presentation involved isolated visual field deficit without motor or sensory affection.
  • This suggests a specific pattern of neurological deficit related to thalamic hemorrhage location.

Implications:

  • This case expands the understanding of clinical manifestations of thalamic hemorrhages.
  • It underscores the importance of neuroimaging in diagnosing atypical neurological presentations.
  • Further research may elucidate the precise mechanisms linking thalamic hematoma location to specific deficits.