Human iEEG study supports predictive routing: same sound, different brain state
neuroprinciples · x · 2026-11-03
A new preprint from the Bastos lab (Michigan/Vanderbilt/Henry Ford Hospital) uses human intracranial EEG recordings during audiovisual speech violations to support and extend the predictive routing model of predictive processing.
- The model holds that predictions boost alpha-beta rhythms (10-30 Hz) that suppress gamma rhythms (40-150 Hz), dynamically routing sensory processing rather than passively reconstructing the world from input.
- It follows related primate work from the Tsao lab showing monkey visual cortex flickering 15x/sec between what is seen and what is suppressed with unchanged stimuli.
- In humans, the same sound under different percepts maps to different brain states, set by the eyes — cross-species evidence for predictive routing.
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