The neurons that let us see what isn't there
6 days ago
- #visual-illusions
- #perception
- #neuroscience
- Hyeyoung Shin, assistant professor at Seoul National University, led a study identifying neurons (IC-encoders) in the visual cortex that represent visual illusions.
- The study, published in Nature Neuroscience, involved collaboration between UC Berkeley, the Allen Institute, and Seoul National University.
- Illusory contours, like the Kanizsa triangle, are perceived edges that don't physically exist, demonstrating the brain's ability to 'fill in' missing information.
- Neurons in the primary visual cortex (V1) and higher visual areas respond to both real and illusory contours, as shown in primate, human, and mouse studies.
- The visual system integrates local and long-range neural signals, using prior knowledge to guide interpretations, rather than passively recording input like a camera.
- The study used advanced brain imaging and causal tests (direct neuron stimulation) to identify neurons encoding these perceptual inferences.