Semantic novelty modulates neural responses to visual change across the human brain

Maximilian Nentwich (), Marcin Leszczynski, Brian E. Russ, Lukas Hirsch, Noah Markowitz, Kaustubh Sapru, Charles E. Schroeder, Ashesh D. Mehta, Stephan Bickel and Lucas C. Parra ()
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Maximilian Nentwich: The City College of New York
Marcin Leszczynski: Columbia University College of Physicians and Surgeons
Brian E. Russ: Center for Biomedical Imaging and Neuromodulation, Nathan Kline Institute
Lukas Hirsch: The City College of New York
Noah Markowitz: Northwell Health
Kaustubh Sapru: The City College of New York
Charles E. Schroeder: Columbia University College of Physicians and Surgeons
Ashesh D. Mehta: Northwell Health
Stephan Bickel: Center for Biomedical Imaging and Neuromodulation, Nathan Kline Institute
Lucas C. Parra: The City College of New York

Nature Communications, 2023, vol. 14, issue 1, 1-17

Abstract: Abstract Our continuous visual experience in daily life is dominated by change. Previous research has focused on visual change due to stimulus motion, eye movements or unfolding events, but not their combined impact across the brain, or their interactions with semantic novelty. We investigate the neural responses to these sources of novelty during film viewing. We analyzed intracranial recordings in humans across 6328 electrodes from 23 individuals. Responses associated with saccades and film cuts were dominant across the entire brain. Film cuts at semantic event boundaries were particularly effective in the temporal and medial temporal lobe. Saccades to visual targets with high visual novelty were also associated with strong neural responses. Specific locations in higher-order association areas showed selectivity to either high or low-novelty saccades. We conclude that neural activity associated with film cuts and eye movements is widespread across the brain and is modulated by semantic novelty.

Date: 2023
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DOI: 10.1038/s41467-023-38576-5

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