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News
Your brain isn't a camera — and scientists just proved it. Researchers at UCL reconstructed 10-second videos from the brain activity of mice using signals from individual neurons in the visual cortex. The breakthrough opens a new window into how the brain filters and reshapes what we see before it becomes conscious perception.
Researchers at University College London (UCL) have achieved something remarkable: they reconstructed short videos using only the recorded brain activity of mice. Published in eLife, the study used signals from individual neurons in the visual cortex — rather than broader brain imaging — to generate high-quality, 10-second video reconstructions of what the mice were actually watching.
The team used a dynamic neural encoding model that predicts how individual neurons respond to visual stimuli, factoring in variables like movement and pupil diameter. By comparing predicted neural activity (as if the mouse saw a blank screen) against actual activity during video viewing, an algorithm iteratively adjusted pixels on a blank canvas until the reconstruction closely matched the original footage — even for videos the model had never seen before.
Key Takeaways:
Why it matters: Vision isn't passive recording — the brain actively filters and reshapes sensory input. This technique could help scientists map exactly where and how those distortions occur, with future potential to compare visual perception across species and inform our understanding of neurological conditions affecting sight.
