Electrophysiological Low-Frequency Coherence and Cross-Frequency Coupling Contribute to BOLD Connectivity

Brain networks are commonly defined using correlations between blood oxygen level-dependent (BOLD) signals in different brain areas. Although evidence suggests that gamma-band (30–100 Hz) neural activity contributes to local BOLD signals, the neural basis of interareal BOLD correlations is unclear....

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Veröffentlicht in:	Neuron (Cambridge, Mass.) Mass.), 2012-12, Vol.76 (5), p.1010-1020
Hauptverfasser:	Wang, Liang, Saalmann, Yuri B., Pinsk, Mark A., Arcaro, Michael J., Kastner, Sabine
Format:	Artikel
Sprache:	eng
Schlagworte:	Anesthesia Animals Brain Brain - blood supply Brain - physiology Brain Mapping Brain Waves - physiology Electroencephalography Electrophysiological recording Fixation, Ocular - physiology Image Processing, Computer-Assisted Macaca mulatta Magnetic Resonance Imaging Neural networks Neural Pathways - blood supply Neural Pathways - physiology Oscillations Oxygen Photic Stimulation Rest Statistics as Topic Studies Time series
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Zusammenfassung:	Brain networks are commonly defined using correlations between blood oxygen level-dependent (BOLD) signals in different brain areas. Although evidence suggests that gamma-band (30–100 Hz) neural activity contributes to local BOLD signals, the neural basis of interareal BOLD correlations is unclear. We first defined a visual network in monkeys based on converging evidence from interareal BOLD correlations during a fixation task, task-free state, and anesthesia, and then simultaneously recorded local field potentials (LFPs) from the same four network areas in the task-free state. Low-frequency oscillations (
ISSN:	0896-6273 1097-4199
DOI:	10.1016/j.neuron.2012.09.033