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Schaumstein's Aphantasia Discovery
- Sarah Schaumstein, a vision scientist, realized she had aphantasia during a seminar.
- She was asked to imagine an apple but couldn't visualize it, unlike her colleagues.
Aphantasia Prevalence and Nature
- Aphantasia affects 1%-4% of people, who lack mental imagery.
- It's not a disorder, but a different way of experiencing the world, potentially due to varied brain connections.
How Mental Imagery Works
- Mental imagery may work by reversing visual perception.
- An idea triggers high-level visual regions, which then fill in details, unlike perception starting with light on the retina.