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- W4366198925 abstract "Context modulates neocortical processing of sensory data. Unexpected visual stimuli elicit large responses in primary visual cortex (V1) -- a phenomenon known as deviance detection (DD) at the neural level, or mismatch negativity (MMN) when measured with EEG. It remains unclear how visual DD/MMN signals emerge across cortical layers, in temporal relation to the onset of deviant stimuli, and with respect to brain oscillations. Here we employed a visual oddball sequence - a classic paradigm for studying aberrant DD/MMN in neuropsychiatric populations - and recorded local field potentials in V1 of awake mice with 16-channel multielectrode arrays. Multiunit activity and current source density profiles showed that while basic adaptation to redundant stimuli was present early (50ms) in layer 4 responses, DD emerged later (150-230ms) in supragranular layers (L2/3). This DD signal coincided with increased delta/theta (2-7Hz) and high-gamma (70-80Hz) oscillations in L2/3 and decreased beta oscillations (26-36hz) in L1. These results clarify the neocortical dynamics elicited during an oddball paradigm at a microcircuit level. They are consistent with a predictive coding framework, which posits that predictive suppression is present in cortical feed-back circuits, which synapse in L1, while prediction errors engage cortical feed-forward processing streams, which emanate from L2/3." @default.
- W4366198925 created "2023-04-19" @default.
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- W4366198925 date "2023-04-17" @default.
- W4366198925 modified "2023-09-25" @default.
- W4366198925 title "Spatiotemporal dynamics across visual cortical laminae support a predictive coding framework for interpreting mismatch responses" @default.
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- W4366198925 doi "https://doi.org/10.1101/2023.04.17.537173" @default.
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