When mild pure alexia may not be reducible to hemianopic alexia
| Autor: | Ildebrando Appollonio, Valeria Isella, Tim Shallice, Cristina Rosazza |
|---|---|
| Přispěvatelé: | Rosazza, C, Isella, V, Appollonio, I, Shallice, T |
| Rok vydání: | 2018 |
| Předmět: |
Male
medicine.medical_specialty Cognitive Neuroscience media_common.quotation_subject Experimental and Cognitive Psychology Audiology M-PSI/02 - PSICOBIOLOGIA E PSICOLOGIA FISIOLOGICA right homonymous hemianopia 050105 experimental psychology Dyslexia 03 medical and health sciences 0302 clinical medicine Reading impairment Arts and Humanities (miscellaneous) Reading (process) 80 and over Developmental and Educational Psychology medicine Humans Pure 0501 psychology and cognitive sciences Aged media_common word-length effect MED/26 - NEUROLOGIA Aged 80 and over 05 social sciences Alexia Pure Neuropsychology split-field reading task Pure alexia Middle Aged medicine.disease eye diseases Visual field MED/34 - MEDICINA FISICA E RIABILITATIVA Neuropsychology and Physiological Psychology Hemianopsia Female Alexia Psychology 030217 neurology & neurosurgery |
| Zdroj: | Cognitive Neuropsychology. 35:479-484 |
| ISSN: | 1464-0627 0264-3294 |
| Popis: | Individuals with pure alexia often have visual field defects such as right homonymous hemianopia. Relatively few attempts have been made to develop criteria to differentiate pure alexia from hemianopic alexia. In this Commentary we provide concrete suggestions to distinguish the two disorders. We also report on additional assessments with two previously reported cases for whom the diagnosis of pure alexia was called into question and an alternative proposal was offered that the reading deficits were instead due to hemianopia. We show that the results of clinical and neuropsychological tests do not support the account that the reading impairment was caused by the visual field defect. In particular, for both cases, the right homonymous hemianopia was not complete, and a split-field reading task demonstrated an inability also to read words presented in the intact left visual field. In conclusion, pure alexics may indeed show fairly modest word-length effects; however, the presence of right homonymous hemianopia and a non-extreme gradient of reading speed alone are not sufficient grounds to put in doubt the diagnosis. We propose that a fuller clinical and neuropsychological examination taking into account the possible confounding effects of the visual field defects will help to distinguish pure alexia from hemianopic alexia. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |