 A Bayesian perceptual model closely replicates the cutaneous rabbit and other tactile spatiotemporal illusions.According to this model, brain circuitry encodes the expectation, acquired through sensory experience, that tactile stimuli tend to be stationary or to move only slowly.The Bayesian model reaches an optimal probabilistic inference by combining uncertain spatial sensory information with a prior expectation for low-speed movement (a Gaussian prior distribution over velocity, with mean 0).