Shuren J E, Brott T G, Schefft B K, Houston W
Department of Neurology, University of Cincinnati College of Medicine, OH 45267-0525, USA.
Neuropsychologia. 1996 Jun;34(6):485-9. doi: 10.1016/0028-3932(95)00153-0.
The loss of color vision secondary to central nervous system disease (achromatopsia) is thought to preclude visual imagery of colors. We report a patient with achromatopsia, secondary to bilateral temporo-occipital infarcts inclusive of the lingual and fusiform gyri, with preserved color imagery. Our findings, in conjunction with previous cases in the literature, are consistent with a single neural network for color processing in which a disconnection of internal activation from stored color representations produces impaired color imagery with preserved color perception, whereas a disconnection of visual input to these representations produces achromatopsia with preserved color imagery.
