Anosognosia for cerebral achromatopsia--a longitudinal case study

Neuropsychologia
Sebastian W von ArxThomas Nyffeler

Abstract

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.

References

Jan 1, 1977·Archives of Ophthalmology·G J Green, S Lessell
Apr 1, 1977·Journal of Neurology, Neurosurgery, and Psychiatry·A M Whiteley, E K Warrington
Jun 1, 1975·Journal of Neurology, Neurosurgery, and Psychiatry·M L AlbertR Silverberg
Jan 1, 1991·Optometry and Vision Science : Official Publication of the American Academy of Optometry·D A AtchisonA J Vingrys
Dec 1, 1990·Brain : a Journal of Neurology·S Zeki
Dec 1, 1988·Klinische Monatsblätter für Augenheilkunde·W JaegerS Braun
Dec 1, 1974·Brain : a Journal of Neurology·J C Meadows
Feb 1, 1971·The British Journal of Social and Clinical Psychology·A D MilnerV J Walker
Nov 1, 1965·Brain : a Journal of Neurology·M Critchley
Aug 1, 1983·Klinische Monatsblätter für Augenheilkunde·A ScarpatettiW Jung
Dec 1, 1982·Perceptual and Motor Skills·M RegardP Knapp
Jul 1, 1981·Neurology·P W BrazisM Fine
Jan 1, 1995·Postgraduate Medical Journal·R W OrrellM N Rossor
May 1, 1993·Neurology·M RizzoA R Damasio
Feb 1, 1996·Current Biology : CB·T TrosciankoW Phillips
May 1, 1996·Australian and New Zealand Journal of Ophthalmology·R D Fine, G D Parker
Jun 1, 1997·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·P BartolomeoG Denes
Jan 9, 1999·Proceedings. Biological Sciences·A Bartels, S Zeki
Jan 29, 2000·The European Journal of Neuroscience·A Bartels, S Zeki
Jan 1, 1991·The European Journal of Neuroscience·C. A. HeywoodF. Newcombe
Aug 15, 2003·Neurologic Clinics·Charles A Heywood, Robert W Kentridge
Aug 1, 1955·Journal of Neurology, Neurosurgery, and Psychiatry·C A PALLIS
May 1, 1962·Journal of Neurology, Neurosurgery, and Psychiatry·E S BEYN, G R KNYAZEVA
Dec 19, 2003·Annals of the New York Academy of Sciences·Luigi A Vignolo
Aug 18, 2004·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Barry L Cole
Apr 28, 2006·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Barry L Cole, Ka-Yee Lian
Mar 28, 2007·American Journal of Ophthalmology·Paul W Brazis
Jan 31, 2014·Frontiers in Human Neuroscience·Gilles RodeGiuseppe Vallar

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Citations

Apr 12, 2016·PsyCh Journal·Josef Zihl, Charles A Heywood
Apr 1, 2015·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Giulio Tononi, Christof Koch
May 27, 2016·Nature Reviews. Neuroscience·Giulio TononiChristof Koch
Mar 17, 2018·Neurology India·Chenguang ZhouXiangying Li
Sep 26, 2017·Journal of Neuro-ophthalmology : the Official Journal of the North American Neuro-Ophthalmology Society·Sameen HaqueChristian J Lueck
Nov 22, 2019·Frontiers in Neuroscience·Andrea NaniFranco Cauda

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