Perceptual deficits and the activity of the color-opponent and broad-band pathways at isoluminance.

Logothetis NK; Schiller PH; Charles ER; Hurlbert AC
Science, 1990 Jan, 247:4939, 214-7.

The deficits in texture, motion, and depth perception incurred in monkeys at isoluminance were compared with the responses of neurons of the color-opponent and broad-band systems in the lateral geniculate nucleus. Texture perception, assumed to be carried by the color-opponent system, and motion and depth perception, ascribed to the broad-band pathway, were all found to be compromised but not abolished at isoluminance. Correspondingly, both the color-opponent and the broad-band systems were affected at isoluminance, but the activity of the neurons in neither system was abolished. These results suggest that impairment of visual capacities at isoluminance cannot be uniquely attributed to either of these systems and that isoluminant stimuli are inappropriate for the psychophysical isolation of these pathways.

Unique Identifier90100579
Publication Type JOURNAL ARTICLE
ISSN 0036-8075
Country of Publication UNITED STATES