Concurrent processing streams in monkey visual cortex

The concept of multiple processing streams has emerged as a major theme in many studies of the primate visual system. However, the perception of basic attributes such as color, form, depth, and movement cannot be mapped onto different neuronal pathways as a set of simple, one-to-one relationships. Rather, we suggest that many aspects of perception involve significant overlap across a number of paths and cortical areas. Anatomical divergences and convergences that have been reported among processing streams may be related to the multiplicity of strategies for deriving perceptual attributes from the low-level cues provided by retinal images.