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Infra-slow fluctuations in electrophysiological recordings, blood-oxygenation-level-dependent signals, and psychophysical time series

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Check out this Knowledge Base article from StressTherapy Solutions: Infra-slow fluctuations in electrophysiological recordings, blood-oxygenation-level-dependent signals, and psychophysical time series.

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Study at a glance

Area
QEEG, Methods & Mechanisms
Study type
Review & meta-analysis
Authors
Palva JM, Palva S
Journal
NeuroImage
Year
2012
Protocol
review of EEG, BOLD and behavioral infra-slow fluctuations

Key findings

  • Infra-slow BOLD fluctuations are correlated across brain regions that form intrinsic connectivity networks
  • Electrophysiological and BOLD ISFs correlate with infra-slow changes in the amplitude of faster (>1 Hz) activity
  • ISFs also track slow fluctuations in behavioral performance
  • Apparently scale-free ISFs may arise from more local, quasi-periodic infra-slow oscillations

DOI 10.1016/j.neuroimage.2012.02.060 → PubMed 22401756 →

A review of infra-slow fluctuations (ISFs), the spontaneous rises and falls in brain activity that unfold over tens of seconds (roughly 0.01-0.1 Hz). The authors bring together evidence from electrophysiological recordings, blood-oxygenation-level-dependent (BOLD) imaging and behavioral performance data. They argue that ISFs in these different measures are linked to each other and to the strength of faster brain rhythms. The authors conclude that all of these likely reflect one underlying system of interacting slow oscillations that coordinates and separates active neuronal networks.