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Related Experiment Video

Updated: Jun 13, 2026

Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping

Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping

Published on: August 12, 2019

Optic aphasia: a case study.

Miseon Kwon¹, Jae-Hong Lee

¹Department of Neurology, University of Ulsan College of Medicine, Asan Medical Center, Korea.

Journal of Clinical Neurology (Seoul, Korea)

|April 17, 2010

Summary

This summary is machine-generated.

This study details optic aphasia, a condition where patients struggle to name visual objects but can name them through touch or sound. The case highlights shared mechanisms between object recognition and Hanja (ideogram) processing.

Keywords:

Dyslexia Optic aphasia Visual agnosia

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Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

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Published on: June 25, 2019

Area of Science:

Neuroscience
Neurolinguistics
Cognitive Psychology

Background:

Optic aphasia is a rare neurological condition characterized by the inability to name visually presented objects.
Patients with optic aphasia can typically name objects presented through tactile or verbal stimuli.
Anomic aphasia, a broader category, involves difficulties in word retrieval.

Purpose of the Study:

To report a case of optic aphasia in a patient with anomic aphasia following a left posterior cerebral artery infarction.
To investigate the specific visual processing deficits and their relationship to object and symbol recognition.
To explore the potential shared neural mechanisms underlying object recognition and the processing of complex symbols like Hanja.

Main Methods:

A systematic assessment of visual processing for objects and letters was conducted.
The patient's naming abilities were evaluated across different sensory modalities (visual, tactile, verbal).
Specific tests were used to assess the recognition and naming of Hanja (Korean ideograms).

Main Results:

The patient presented with optic aphasia and features of visual associative agnosia.
Visual object naming was impaired, while tactile and verbal naming remained intact.
Despite difficulty reading Hanja, the patient could identify Hanja based on verbal descriptions of their meaning.

Conclusions:

The findings suggest a shared mechanism between the visual recognition of objects and the processing of Hanja.
This case contributes to understanding the complex neural pathways involved in visual semantics and symbol processing.
Optic aphasia, particularly with mixed features, provides insights into the dissociation of visual processing functions.