Anosognosia for cerebral achromatopsia--a longitudinal case study

von Arx, Sebastian W; Müri, René M; Heinemann, Doerthe; Hess, Christian W; Nyffeler, Thomas (2010). Anosognosia for cerebral achromatopsia--a longitudinal case study. Neuropsychologia, 48(4), pp. 970-7. Oxford: Elsevier 10.1016/j.neuropsychologia.2009.11.018

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Cerebral achromatopsia is a rare disorder of colour vision caused by bilateral damage to the occipito-temporal cortex. Patients with cerebral achromatopsia are commonly said to suffer due to their disturbed colour sense. Here, we report the case of a patient with cerebral achromatopsia who was initially unaware of his deficit, although three experiments with eye movement recordings demonstrated his severe inability to use colour information in everyday tasks. During two months, the evolution of his colour vision deficit was followed with repeated standardized colour vision tests and eye movement recordings. While his performance continuously improved, he became more and more aware of the deficit. Only after colour vision had almost normalized, his subjective colour sensation was inconspicuous again. The simultaneous occurrence of achromatopsia and the corresponding anosognosia and their parallel recovery suggest that both deficits were due to dysfunction of the same brain region. Consequently, the subjective experience of colour loss in achromatopsia may depend on the residual function of the damaged colour centre.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Müri, René Martin; Heinemann, Dörthe; Hess, Christian Walter and Nyffeler, Thomas

ISSN:

0028-3932

Publisher:

Elsevier

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:08

Last Modified:

02 Oct 2019 12:10

Publisher DOI:

10.1016/j.neuropsychologia.2009.11.018

PubMed ID:

19944708

Web of Science ID:

000275933500013

URI:

https://boris.unibe.ch/id/eprint/368 (FactScience: 197867)

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