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Medicina: Neuropsicologia cognitiva

pure alexia clicca per ingrandire
Attestation 3
Part of speech Noun phrase
Definition An acquired inability to read without a corresponding deficit in writing. Patients are unable to read their own written words.
Inability to read without a corresponding deficit in writing. Patients with pure agraphia continue to be able to write, spontaneously or to dictation. Many such patients can also copy writing, although they do so with difficulty. Speech, auditory comprehension, and repetition are intact. Oral spelling of words (or its converse, the construction of words spelled orally) is normal. It is generally associated with large ischemic lesions in the posterior cerebral artery territory of the language dominant hemisphere that affects both the visual cortex and the posterior corpus callosum.
Definition source Loring D. W. 1999
Vista-Mead 2001
Context Patients displaying pure alexia (also commonly called "alexia without agraphia" in the neurological literature and "letter-by-letter reading" in the neuropsychological literature) are poor at identifying written words, where poor always means slow-with word-naming speed a monotonic function of word length, hence the sobriquet letter-by-letter reading-and often inaccurate as well. By contrast, these patients typically show excellent performance at recognising words spelled aloud to them.
Context source Riddoch et al. 1994
Synonym Alexia without agraphia
Subject field Aphasia
Sub-field (level 1) Aphasiology
Sub-field (level 2) Clinical neuropsychology
Sub-field (level 3) Aphasic syndromes
Generic concept Pure form
Related concept Alexia with agraphia, Pure word deafness, Pure agraphia, Anarthria
it Forma pura
Reliability code 3

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