Akiko Takaiwa, Hirokazu Yoshimura, Hirofumi Abe, Satoshi Terai, "Radical “Visual Capture” Observed in a Patient with Severe Visual Agnosia", Behavioural Neurology, vol. 14, Article ID 404087, 7 pages, 2003. https://doi.org/10.1155/2003/404087
Radical “Visual Capture” Observed in a Patient with Severe Visual Agnosia
We report the case of a 79-year-old female with visual agnosia due to brain infarction in the left posterior cerebral artery. She could recognize objects used in daily life rather well by touch (the number of objects correctly identified was 16 out of 20 presented objects), but she could not recognize them as well by vision (6 out of 20). In this case, it was expected that she would recognize them well when permitted to use touch and vision simultaneously. Our patient, however, performed poorly, producing 5 correct answers out of 20 in the Vision-and-Touch condition. It would be natural to think that visual capture functions when vision and touch provide contradictory information on concrete positions and shapes. However, in the present case, it functioned in spite of the visual deficit in recognizing objects. This should be called radical visual capture. By presenting detailed descriptions of her symptoms and neuropsychological and neuroradiological data, we clarify the characteristics of this type of capture.
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