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Cited by 26Reading and Literacy DevelopmentNeurobiology of Language and BilingualismVisual perception and processing mechanisms

Optic aphasia with pure alexia: a mild form of visual associative agnosia? A case study

Chanoine, V., Ferreira, C. Teixeira, Demonet, J.F., Nespoulous, J.L., Poncet, M.·1998·Cortex
DOI 10.1016/s0010-9452(08)70766-4
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Abstract

A single-case study is reported of a naming disorder selective to the visual modality. The patient showed intact access to structural knowledge of objects and letters, but impaired access to complete semantic knowledge of objects and alphabetical knowledge of letters from visual input. The impairment was most striking when the patient had to discriminate between semantically similar objects or within a given symbolic repertoire, i.e. letters. The co-occurrence of a partial deficit of visual recognition for objects and for letters indicated features of optic aphasia and pure alexia. This symmetric performance between object and letter processing may also constitute a mild form of visual associative agnosia.

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  • Chanoine et al. (1998) reported closely similar findings in another patient.

    “Chanoine et al. (1998) reported closely similar findings in another patient.”

    From Specialization within the ventral stream: the case for the visual word form area (2004) · cites this paper as Chanoine et al., 1998

  • In Chanoine et al.'s patient, when distractors were digits or simple geometrical shapes, the patient could easily match lower- and upper-case letters, or pick out a printed letter named by the examiner, although these tasks were severely impaired when distractors were other letters.

    “They also observed that whenever the distractors were digits or simple geometrical shapes, the patient could easily match lower- and upper-case letters, or pick out a printed letter named by the examiner, although these tasks were severely impaired when the distractors were other letters.”

    From Specialization within the ventral stream: the case for the visual word form area (2004) · cites this paper as Chanoine et al., 1998

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Authors
Chanoine, V., Ferreira, C. T., Demonet, J. F., Nespoulous, J. L., & Poncet, M.
Affiliations
  • Inserm (FR)
  • Universidade Federal do Rio de Janeiro (BR)
ORCID
Chanoine, V.
Venue
Cortex
Publisher
Elsevier BV
Published
1998-01
Volume
34
Issue
3
Pages
437-448
ISSN
0010-9452 (ISSN-L)
DOI
10.1016/s0010-9452(08)70766-4
OpenAlex
W2079643995
Cited by
26
References
24
Citations by year
2024: 1 · 2022: 1 · 2017: 2 · 2015: 2 · 2014: 1 · 2013: 1 · 2012: 1
FWCI
1.29
Type
journal article
Language
en
Open access
closed
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations
  • Cortex (publishedVersion)
  • PubMed (publishedVersion)
  • HAL AMU (submittedVersion)
  • Oskar-Bordeaux (Universite de Bordeaux) (submittedVersion)
Topics
  • Social Sciences › Psychology › Developmental and Educational Psychology › Reading and Literacy Development
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
optic aphasia, pure alexia, visual word recognition, object naming, semantic knowledge, letter knowledge, visual modality
MeSH terms
Aged, Agnosia, Aphasia, Attention, Brain Mapping, Cerebral Infarction, Discrimination Learning, Dyslexia, Acquired, Humans, Male, Neuropsychological Tests, Pattern Recognition, Visual, Perceptual Disorders, Mental Recall, Semantics, Visual Perception

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