Braille alexia during visual hallucination in a blind man with selective calcarine atrophy
نویسندگان
چکیده
منابع مشابه
Alexia for Braille following bilateral occipital stroke in an early blind woman.
Recent functional imaging and neurophysiologic studies indicate that the occipital cortex may play a role in Braille reading in congenitally and early blind subjects. We report on a woman blind from birth who sustained bilateral occipital damage following an ischemic stroke. Prior to the stroke, the patient was a proficient Braille reader. Following the stroke, she was no longer able to read Br...
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Around 25% of patients with visual hallucinations secondary to eye disease report hallucinations of text. The hallucinated text conveys little if any meaning, typically consisting of individual letters, words, or nonsense letter strings (orthographic hallucinations). A patient is described with textual visual hallucinations of a very different linguistic content following bilateral occipito-tem...
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Processing of the found points to get the lines and columns in the text, what we call the Braille mesh determination. This works relates the principles of an optical character recognizer (O.C.R.) for the Braille Code (the kind of writing used by blind people). We developed this system sponsored by the O.N.C.E. (National Organization of Spanish Blind People). The final program runs in the Window...
متن کاملTactile spatial resolution in blind braille readers.
OBJECTIVE To determine if blind people have heightened tactile spatial acuity. BACKGROUND Recently, studies using magnetic source imaging and somatosensory evoked potentials have shown that the cortical representation of the reading fingers of blind Braille readers is expanded compared to that of fingers of sighted subjects. Furthermore, the visual cortex is activated during certain tactile t...
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ژورنال
عنوان ژورنال: Psychiatry and Clinical Neurosciences
سال: 2003
ISSN: 1323-1316,1440-1819
DOI: 10.1046/j.1440-1819.2003.01105.x