Impairments in spatial generalization of visual skills after V4 and TEO lesions in macaques (Macaca mulatta).
The authors tested the spatial generalization of shape and color discriminations in 2 monkeys, in which 3 visual field quadrants were affected, respectively, by lesions in area V4, TEO, or both areas combined. The fourth quadrant served as a normal control. The monkeys were trained to discriminate stimuli presented in a standard location in each quadrant, followed by tests of discrimination performance in new locations in the same quadrant. In the quadrant affected by the V4 + TEO lesion, the authors found temporary but striking deficits in spatial generalization of shape and color discriminations over small distances, suggesting a contribution of areas V4 and TEO to short-range spatial generalization of visual skills.
De Weerd
Peter
P
Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, Maryland, USA. p.deweerd@psychology.unimass.nl
Desimone
Robert
R
Ungerleider
Leslie G
LG
D000818:Animals; D003116:Color; D004193:Discrimination Learning / Q000502:physiology*; D005793:Generalization, Psychological / Q000502:physiology*; D008253:Macaca mulatta; D008297:Male; D013028:Space Perception / Q000502:physiology*; D014793:Visual Cortex / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*