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• W2291288069 abstract "Spontaneous neural activity has historically been viewed as task-irrelevant noise that should be controlled for via experimental design, and removed through data analysis. However, electrophysiology and functional MRI studies of spontaneous activity patterns, which have greatly increased in number over the past decade, have revealed a close correspondence between these intrinsic patterns and the structural network architecture of functional brain circuits. In particular, by analyzing the large-scale covariation of spontaneous hemodynamic activity, researchers are able to reliably identify functional networks in the human brain. Subsequent work has sought to identify the corresponding neural signatures via electrophysiological measurements, as this would elucidate the neural origin of spontaneous hemodynamic dynamics, and would reveal the temporal dynamics of these processes across slower and faster timescales. Here we survey common approaches to quantifying spontaneous neural activity, reviewing their empirical success, and their correspondence with the findings of neuroimaging. We emphasize invasive electrophysiological measurements, which are amenable to amplitude- and phase-based analyses, and which can report variations in connectivity with high spatiotemporal precision. After summarizing key findings from the human brain, we survey work in animal models that display similar multi-scale properties. We highlight that, across many spatiotemporal scales, the covariance structure of spontaneous neural activity reflects structural properties of neural networks and dynamically tracks their functional repertoire." @default.
• W2291288069 created "2016-06-24" @default.
• W2291288069 creator A5011059599 @default.
• W2291288069 creator A5024140873 @default.
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• W2291288069 creator A5045988972 @default.
• W2291288069 creator A5051870567 @default.
• W2291288069 date "2016-02-09" @default.
• W2291288069 modified "2023-09-29" @default.
• W2291288069 title "Spontaneous Neural Dynamics and Multi-scale Network Organization" @default.
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