Parietal contributions to visual feature binding: evidence from a patient with bilateral lesions.
Neurophysiologists have documented the existence of multiple cortical areas responsive to different visual features. This modular organization has sparked theoretical interest in how the "binding problem" is solved. Recent data from a neurological patient (R.M.) with bilateral parietal-occipital lesions demonstrates that the binding problem is not just a hypothetical construct; it can be a practical problem, as rare as the selective inability to perceive motion or color. R.M. miscombines colors and shapes even under free viewing conditions and is unable to judge either relative or absolute visual locations. The evidence suggests that a single explanation--an inadequate spatial representation--can account for R.M.'s spatial judgment and feature-binding deficits.
Friedman-Hill
S R
SR
Center for Neuroscience, University of California, Davis 95616, USA.
Robertson
L C
LC
Treisman
A
A
D002544:Cerebral Infarction / Q000150:complications / Q000503:physiopathology; D005556:Form Perception / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009778:Occipital Lobe / Q000502:physiology / Q000503:physiopathology; D009903:Optical Illusions / Q000502:physiology; D010296:Parietal Lobe / Q000502:physiology* / Q000503:physiopathology; D010468:Perceptual Disorders / Q000209:etiology / Q000503:physiopathology*; D012858:Size Perception / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D014795:Visual Pathways; D014796:Visual Perception / Q000502:physiology*