Behavioral and Brain Sciences

Short Communication

Neuroanatomy and function in two visual systems

Bruce Bridgeman a1
a1 Department of Psychology, University of California at Santa Cruz, Santa Cruz, CA 95060


Neuroanatomy and neurophysiology are insufficient to specify function. Modeling is essential to elucidate function, but psychophysics is also required. An example is the cognitive and sensorimotor branches of the visual system: anatomy shows direct cross talk between the branches. Psychophysics in normal humans shows links from cognitive to sensorimotor, but the reverse link is excluded by visual illusions affecting the cognitive system but not the sensorimotor system.