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Does alexia without agraphia always include hemianopsia?

K Lühdorf, O B Paulson

    Acta Neurologica Scandinavica
    |April 1, 1977
    PubMed
    Summary
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    This study reports a case of pure alexia, a condition affecting reading ability without loss of writing skills. The patient exhibited subtle visual field defects, challenging previous understandings of this neurological syndrome.

    Area of Science:

    • Neuroscience
    • Ophthalmology
    • Neurology

    Background:

    • Alexia without agraphia, or pure alexia, is a rare neurological condition characterized by the inability to read despite preserved writing ability.
    • Understanding the neuroanatomical correlates of pure alexia is crucial for diagnosing and managing reading disorders.

    Observation:

    • A patient presenting with pure alexia was examined.
    • Initial bedside visual field tests revealed no abnormalities.
    • Detailed perimetric examination identified an incomplete right homonymous hemianopsia with peripheral visual field sparing.

    Findings:

    • The observed visual field defect in a patient with pure alexia is atypical.
    • This case challenges the established notion that pure alexia is exclusively associated with intact visual fields.

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  • The findings suggest a more complex relationship between visual processing deficits and reading impairment.

    • Implications:

    • This case highlights the importance of comprehensive visual field testing in patients with suspected pure alexia.
    • The findings may necessitate a re-evaluation of the neuroanatomical models underlying pure alexia.
    • Further research is warranted to explore the spectrum of visual field deficits associated with this syndrome.