301. The effects of sub-cortical and cortical damage on colour vision
- Author
-
Janus J. Kulikowski and Vincent Walsh
- Subjects
genetic structures ,biology ,Retinal ,medicine.disease ,eye diseases ,Ganglion ,chemistry.chemical_compound ,Visual cortex ,medicine.anatomical_structure ,Retinal ganglion cell ,chemistry ,biology.animal ,Optic nerve ,medicine ,Optic neuritis ,Primate ,Chromatic scale ,Neuroscience - Abstract
Fundamentally different colour vision deficiencies result from the damage to retinal and cortical stages of colour processing. Damage to colour-opponent retinal units, at the ganglion cells or optic nerve fibres, abolishes all aspects of colour vision. Conversely, cortical lesions of primate visual area V4 affect only one aspect of colour vision, namely colour constancy leaving colour discrimination and simple categorization intact. The chromatic visual evoked potentials in macaques with bilateral V4 lesions are normal.
- Published
- 1995
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