A schizophrenic process is more of a bottom up process than a top down which is what we do. We are unable to see a hollow face at first because we have never seen that before in our prior experience. This illusion occurs because the brain interprets information based on context and previous experience, or top down processing. In schizophrenic people there is a dysconnectivity between the parietal cortex, where top down occurs, and the lateral occipital cortex, where bottom up occurs, which is why they see the hollow face right away. In healthy people the connectivity in these areas are increased which is why they see a regular rotating face
Reber Shukri Professor Vaughn Negative afterimage is a stimulus which elicits a positive image. In order to experience this, one can look at a bright source of light and then look away to a dark area. The way negative afterimage works is when the eye's photo-receptors which are the rods and cones adapt to over stimulation and lose sensitivity. The photo-receptors which are constantly exposed to the same stimulus will fatigue their supply of photo pigment, resulting a decrease in signal to the brain. The way negative afterimage connects to perception is because of bottom up processing where the stimulus influences what we perceive. https://www.youtube.com/watch?v=szy8iNCljlQ <Link to the video
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