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Braille alexia during visual hallucination in a blind man with selective calcarine atrophy
Author(s) -
Maeda Kengo,
Yasuda Hitoshi,
Haneda Masakazu,
Kashiwagi Atsunori
Publication year - 2003
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1046/j.1440-1819.2003.01105.x
Subject(s) - visual hallucination , braille , dyslexia , visual cortex , psychology , atrophy , cortex (anatomy) , audiology , neuroscience , reading (process) , medicine , pathology , computer science , political science , law , operating system
The case of a 56‐year‐old man who has been blind for 25 years due to retinal degeneration is herein described. The patient complained of elementary visual hallucination, during which it was difficult for him to read Braille. Brain magnetic resonance imaging showed marked atrophy of the bilateral striate cortex. Visual hallucination as a release phenomenon of the primary visual cortex has never been reported to cause alexia for Braille. The present case supports the results of recent functional imaging studies of the recruitment of striate and prestriate cortex for Braille reading.