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• W2047672697 abstract "How visual object categories are represented in the brain is one of the key questions in neuroscience. Studies on low-level visual features have shown that relative timings or phases of neural activity between multiple brain locations encode information. However, whether such temporal patterns of neural activity are used in the representation of visual objects is unknown. Here, we examined whether and how visual object categories could be predicted (or decoded) from temporal patterns of electrocorticographic (ECoG) signals from the temporal cortex in five patients with epilepsy. We used temporal correlations between electrodes as input features, and compared the decoding performance with features defined by spectral power and phase from individual electrodes. While using power or phase alone, the decoding accuracy was significantly better than chance, correlations alone or those combined with power outperformed other features. Decoding performance with correlations was degraded by shuffling the order of trials of the same category in each electrode, indicating that the relative time series between electrodes in each trial is critical. Analysis using a sliding time window revealed that decoding performance with correlations began to rise earlier than that with power. This earlier increase in performance was replicated by a model using phase differences to encode categories. These results suggest that activity patterns arising from interactions between multiple neuronal units carry additional information on visual object categories." @default.
• W2047672697 created "2016-06-24" @default.
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• W2047672697 date "2014-04-01" @default.
• W2047672697 modified "2023-10-04" @default.
• W2047672697 title "Decoding visual object categories from temporal correlations of ECoG signals" @default.
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• W2047672697 doi "https://doi.org/10.1016/j.neuroimage.2013.12.020" @default.
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• W2047672697 hasPublicationYear "2014" @default.
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