phonological agraphia
Pronunciation: foh-noh-LOJ-ih-kul ah-GRAF-ee-ah
Writing disorder characterized by difficulty spelling unfamiliar words and nonwords while retaining ability to spell familiar real words.
Full Definition
Phonological agraphia is a specific writing impairment that results from damage to brain regions involved in sound-to-spelling conversion, typically affecting the left perisylvian areas including the supramarginal gyrus and adjacent regions. Patients demonstrate a selective deficit in spelling unfamiliar words, nonwords, and phonetically irregular words, while maintaining relatively preserved spelling of familiar words that can be retrieved from orthographic memory. This dissociation suggests damage to the phoneme-to-grapheme conversion route while sparing the lexical spelling route. The condition often co-occurs with phonological dyslexia and can be a component of broader language disorders following stroke or neurodegenerative disease.
Usage
Usage note: Two words, not hyphenated. Part of the dual-route model of spelling.
In Context
- "The patient's phonological agraphia was evident in her inability to spell dictated nonwords despite accurate spelling of familiar vocabulary." — Neuropsychological testing
- "Phonological agraphia following the left hemisphere stroke required specialized spelling therapy focusing on sound-letter correspondences." — Speech therapy note