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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

243
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...
243
Prosopagnosia01:24

Prosopagnosia

212
Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
212

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Related Experiment Video

Updated: Jul 27, 2025

Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke
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Recurrent Young Stroke With Hemianopia.

Aparajit Ravikumar1, Swathy Moorthy1, Lakshmi Marappa1

  • 1Internal Medicine, Sri Ramachandra Institute of Higher Education and Research, Chennai, IND.

Cureus
|June 12, 2023
PubMed
Summary
This summary is machine-generated.

Mildly elevated homocysteine levels may indicate a risk for recurrent ischemic stroke, even in younger adults. This case highlights the importance of monitoring homocysteine in patients with a history of cerebrovascular accidents.

Keywords:
cerebrovascular accidentfield of visionhyperhomocysteinemiaparietal infarctposterior circulation strokestroke

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Area of Science:

  • Neurology
  • Ophthalmology
  • Metabolic Disorders

Background:

  • Homocysteine is a toxic intermediate in methionine metabolism.
  • Hyperhomocysteinemia is a potential risk factor for ischemic stroke.

Observation:

  • A 39-year-old male with a history of stroke presented with acute, progressive visual disturbances including giddiness, reduced vision, and double vision.
  • Ophthalmic examination revealed bilateral homonymous hemianopia and reduced visual fields.
  • Neuroimaging showed acute infarcts in the right occipito-parietal region, thalamus, and corpus callosum.

Findings:

  • Mildly elevated serum homocysteine levels were noted.
  • Humphrey visual field perimetry confirmed left homonymous congruous hemianopia, correlating with the right parietal lobe infarct.
  • The patient had a history of recurrent infarcts affecting both anterior and posterior circulation.

Implications:

  • This case underscores the potential link between hyperhomocysteinemia and recurrent cerebrovascular events, including visual field defects.
  • It emphasizes the need for vigilant monitoring of homocysteine levels in patients with a history of stroke, particularly those with visual symptoms.
  • Management of homocysteine levels may be crucial in preventing further neurological and visual complications.