Omission of an Expected Visual Stimulus Produces a Reproducible, Control-Robust Alteration of Population Geometry in Mouse Primary Visual Cortex

Q: What does this research mean for the field?

The omission of an expected visual stimulus causes a reproducible and robust alteration in neural population geometry within the mouse primary visual cortex and related visual areas, but not in the CA1 region. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Robin Langell

doi:10.5281/zenodo.22232649

September 1, 2026Open Access

Omission of an Expected Visual Stimulus Produces a Reproducible, Control-Robust Alteration of Population Geometry in Mouse Primary Visual Cortex

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Key Points

To determine whether omitting an expected visual stimulus induces a reliable and control-robust shift in neural population geometry within the mouse primary visual cortex and associated brain regions.
Analyzed Allen Visual Behavior Neuropixels recordings from 30 sessions in 30 mice using a frozen, locally matched omission-versus-expected population-chart framework.
Evaluated population chart distance post-versus-pre omission across the primary visual cortex (VISp), higher visual areas (VISam, LP), and the hippocampus (CA1), testing against five falsification and four specificity controls.
In VISp, the post-minus-pre change in omission-versus-expected chart distance was positive in 30 of 30 sessions (median 0.980, p = 9.999×10⁻⁵) and persisted through all nine falsification and specificity controls.
The population geometry effect replicated after statistical correction in visual areas VISam and LP, but was not detected in hippocampal area CA1.

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Implication

Electrophysiological analysis reveals alterations in neural population geometry following expected visual stimulus omission in mice, indicating reproducible cortical representation shifts.

Abstract

A frozen, locally matched omission-versus-expected population-chart analysis of Allen Visual Behavior Neuropixels (30 sessions, 30 mice). In VISp, the post-minus-pre change in omission-versus-expected chart distance was positive in 30/30 sessions (median 0.980, p = 9.999×10−5), survived five falsification controls and four specificity controls, and replicated after correction in VISam and LP. It was not detected in CA1 under this chart. The result is an operational construct on this dataset, not a biological mechanism or a canonical cross-dataset chart validation.

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Robin Langell (2026) studied this question.

synapsesocial.com/papers/6a9ab0dc5d9e33f25c631e01 https://doi.org/10.5281/zenodo.22232649

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Omission of an Expected Visual Stimulus Produces a Reproducible, Control-Robust Alteration of Population Geometry in Mouse Primary Visual Cortex

Key Points

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Abstract

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Cite This Study

Omission of an Expected Visual Stimulus Produces a Reproducible, Control-Robust Alteration of Population Geometry in Mouse Primary Visual Cortex

Key Points

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Implication

Abstract

Discussion

Cite This Study

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