[Verse 1] In the cortex where the pyramids align Rao and Ballard traced prediction's design Layer five sends guesses to the layer above While layer six brings errors down with precision and love The brain's not just responding to what it sees It's constantly predicting what the future will be When reality mismatches what we thought we'd find Error signals flow backward through the neural divide [Chorus] Predictive coding, error correction Hebbian learning, synaptic connection From the top down the predictions descend Bottom up the errors ascend Backprop approximated in biological ways Through cortical columns where information plays Prediction error minimization Is the brain's computational foundation [Verse 2] Whittington and Bogacz took it further still Showed how Hebbian plasticity fits the bill Local learning rules that neurons can employ To approximate gradients without centralized deploy No need for perfect backward passes through the net Just correlations between what neurons get When prediction neurons fire with error nodes The weights adjust along their natural codes [Chorus] Predictive coding, error correction Hebbian learning, synaptic connection From the top down the predictions descend Bottom up the errors ascend Backprop approximated in biological ways Through cortical columns where information plays Prediction error minimization Is the brain's computational foundation [Bridge] Millidge proved the theory scales beyond To arbitrary graphs where computations spawn Not just feedforward nets or simple trees But complex architectures with recursive degrees The mathematics bridge biology and AI Showing how cortical circuits amplify Learning through prediction and surprise Natural intelligence before our eyes [Verse 3] Inference neurons hold the current best guess While error neurons signal the distress Between what's predicted and what's truly there Driving plasticity with mathematical flair The cortical column as a processing unit Computing hierarchical representations fit For a world that's structured, layered, and deep Where predictions and corrections their vigil keep [Chorus] Predictive coding, error correction Hebbian learning, synaptic connection From the top down the predictions descend Bottom up the errors ascend Backprop approximated in biological ways Through cortical columns where information plays Prediction error minimization Is the brain's computational foundation [Outro] From visual cortex to the whole brain's span Predictive coding reveals the master plan Error-driven learning, biologically real Making artificial networks more like what we feel
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