Year of Publication: 2023
Project:
BOLD Connectivity Dynamics
FIM Authors:
Authors:
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Somayeh Shahsavarani
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David Thibodeaux
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Weihao Xu
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Sharon Kim
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Fatema Lodgher
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Chinwendu Nwokeabia
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Morgan Cambareri
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Alexis Yagielski
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Hanzhi Zhao
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Daniel Handwerker
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Javier Gonzalez-Castillo
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Peter Bandettini
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Elizabeth Hillman
Abstract: Although resting-state functional magnetic resonance imaging (fMRI) studies have observed dynamically changing brain-wide networks of correlated activity, fMRI's dependence on hemodynamic signals makes results challenging to interpret. Meanwhile, emerging techniques for real-time recording of large populations of neurons have revealed compelling fluctuations in neuronal activity across the brain that are obscured by traditional trial averaging. To reconcile these observations, we use wide-field optical mapping to simultaneously record pan-cortical neuronal and hemodynamic activity in awake, spontaneously behaving mice. Some components of observed neuronal activity clearly represent sensory and motor function. However, particularly during quiet rest, strongly fluctuating patterns of activity across diverse brain regions contribute greatly to interregional correlations. Dynamic changes in these correlations coincide with changes in arousal state. Simultaneously acquired hemodynamics depict similar brain-state-dependent correlation shifts. These results support a neural basis for dynamic resting-state fMRI, while highlighting the importance of brain-wide neuronal fluctuations in the study of brain state.
Data
Code
Journal: Cell Reports
Volume: 42
URL:
DOI: 10.1016/j.celrep.2023.112527