Livoa LogoLivoa
PREDICTIVE CODING CORTICAL HIERARCHY


(Adapted from Canonical Microcircuit)

Forward (Bottom-Up) Direction: Prediction Error →

Level 1


SENSORY CORTEX

(V1/V2, FFA, OFA)

Level 2


ASSOCIATION CORTEX

(STS, TPJ)

Level 3


PREFRONTAL CORTEX

(vmPFC, dlPFC)

○ ○ ○ ○


Error

Units

○ ○ ○ ○


Error

Units

○ ○ ○ ○


Error

Units

⊗⊗⊗
⊗⊗⊗
⊗⊗⊗
▲ ▲ ▲ ▲


Prediction

Units

▲ ▲ ▲ ▲


Prediction

Units

▲ ▲ ▲ ▲


Prediction

Units

Sensory Input


(Face Image)

Π_sensory = 0.8

AEGIS


EMOJI

@600ms

Π = 0.90

Prior Beliefs


Π_prior = 0.2

(NT: 0.7-0.9)

← Backward (Top-Down) Direction: Predictions & Precision
Legend:


○ = Error units (superficial Layers 2/3) ε = Prediction error signal

▲ = Prediction units (deep layers 5/6) μ = Prediction signal

⊗ = Comparison (error computation) Π = Precision weighting

L = Cortical layer NT = Neurotypical

test 6

by milo

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