In the parietal association area of alert monkeys, a peculiar type of visual tracking neurons (VT neurons) were found in the posterior part of area 7. These cells were excited not only by the act of tracking but also by movement of a frame around the stationary target fixated by the monkey. The latter stimulation was the same as used to evoked visual illusion of "induced movement". This dual sensitivity of the VT neurons to real and induced movements of the target suggests that these neurons are closely related to motion perception of visual target.