Responses of Neurons in Areas V4 and V5

Note that neurons in the motion-sensitive area V5 responded sooner to stimuli presented in their receptive field, and their firing ceased sooner, than neurons in the form- and colorsensitive area V4. The faster, briefer response is what one would expect of neurons involved in perceiving a moving object’s velocity and direction of movement. (Adapted from Petersen, S., Miezin, F., and Allman, J. Transient and sustained responses in four extrastriate visual areas of the owl monkey. Experimental Brain Research, 1988, 70, 55–60.)