Abstract

Damage to the striate cortex in human subjects results in phenomenal "blindness" in corresponding parts of the retinal-cortical map. Paradoxically, in monkeys visual capacity can still be demonstrated in the affected parts of the visual field, and can be shown to be mediated by non-geniculo-striate pathways (of which there are 9 in addition to the classical geniculo-striate cortical pathway). As the same extra-striate pathways are presumed to exist in humans, the question is whether the difference in results between species depends upon the necessity to use forced-choice discrimination methods in animals.

© 1992 Optical Society of America