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Lesion localization of phonological agraphia
M P Alexander1, R B Friedman, F Loverso
1Aphasia Program, Braintree Hospital, MA 02184.
Brain and Language
|July 1, 1992
Summary
Phonological agraphia, a spelling impairment, affects pseudoword and real word spelling. Lesions in various brain regions involved in phonological processing can cause this condition.
Area of Science:
- Neuroscience
- Linguistics
- Cognitive Psychology
Background:
- Phonological agraphia is a specific spelling disorder.
- It involves difficulties with spelling pronounceable non-words and real words based on linguistic properties.
Observation:
- Two cases of phonological agraphia with distinct brain lesion patterns are presented.
- Existing literature and these cases suggest a broad range of perisylvian cortical regions can cause phonological agraphia.
Findings:
- Phonological agraphia results from impairments in central phonological processing.
- Lesion locations associated with phonological agraphia are diverse but involve areas critical for speech sound manipulation.
Implications:
- Understanding the neural basis of phonological agraphia can inform theories of language production and reading.
- Identifying specific lesion profiles may aid in diagnosing and treating spelling impairments.