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#320 — Constructing Self and World

Making Sense with Sam Harris

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Neuro-Anatomical Plausibility of Visual Perception

Visual perception involves light hitting the retina, being transduced into electrochemical energy in the brain, and passing through different brain areas for detection and encoding. Neurons respond to various features like straight lines, cortical columns build complex images, cells respond to faces including specific ones like Bill Clinton. There's a one-way feed-forward mapping of the world, but there are ample top-down connections from the frontal lobes to the visual cortex, showing a significant influence of higher brain areas on visual processing.

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