Watch The Sick Sense, part 2: The Seventh Sense (2020) : Full Movies Free Streaming Online Building on research by Diana Deutsch, Alfred Bregman, Maryanne Amacher, and others, The Sick Sense is an ongoing project exploring the limits of the perceptual system. These projects stimulate otoacoustic and flicker phenomena as well as auditory and visual hallucinations while searching for stimulus patterns that deactivate the brain’s default mode network, switching the brain into the role of ecstatic perceiver.