Table 4.
Selected multimodal studies related to dynamic rsfMRI. Columns include citation, the species studied, the method used for calculating changes in the fMRI signal, the other modality, and selected observations. Note that several of these studies either included a task in addition to resting state, or used anesthesia in animal models, see the individual studies for specifics. See also the table in (Keilholz, 2014). Acronyms used in table: EEG electroencephalography LFP local field potentials CBF cerebral blood flow CBV cerebral blood volume NIRS near infrared spectroscopy QPP quasi-periodic patterns (a type of large-scale wave).
| Citation | Species | rsfMRI method | Other modality | Selected observations |
|---|---|---|---|---|
| Scholvinck et al., 2010 | Monkeys | Amplitude in 260 s window | LFP power (260 s window) | Variable neurovascular coupling, stronger with eyes closed |
| Magnuson et al., 2010 | Rats | QPP | CBV-weighting (iron oxide nanoparticles) | Similar spatiotemporal structure, waves appear faster in CBF versus BOLD |
| Tagliazucchi et al., 2012b | Humans | Windowed correlation (125 s), graph theoretical measures of it | EEG power (125 s windows) | Positive correlations with gamma power, negative with alpha and beta power |
| Magri et al., 2012 | Monkeys | BOLD amplitude | LFP power (0.5 s window) | BOLD amplitude scales with gamma power, complimentary information given by alpha and beta power |
| Chang et al., 2013a | Humans | Windowed correlation (40 s) | EEG power (2 s windows), mean in 40 s windows | Negative correlations with alpha power, rsfMRI network anticorrelation spatial extent linked to alpha power |
| Thompson et al., 2013b | Rats | Windowed correlation (10–100 s) | LFP power (0.5 s window) | Positive correlation with theta, high beta, and gamma power correlation in matched window |
| Korhonen et al., 2014 | Humans | Windowed correlaiton (120–600 s) | NIRS, EEG infraslow amplitude < 0.55 Hz (120–600 s window) | Higher absolute correlation between modalities in shorter window |
| Thompson et al., 2014b | Rats | QPP | LFP infraslow amplitude (0.03–0.4 Hz) | Spatial extent of correlation with LFP matches QPP, QPP strength directly correlates |
| Thompson et al., 2015 | Rats | Windowed correlation (50 s), QPP | LFP power (hilbert transform), LFP infraslow amplitude (0.04–0.3 Hz) | Infraslow wave linked to QPP, while higher frequency power linked to windowed correlation |
| Tak et al., 2015 | Humans | Number of functional connections per voxel | CBF (Arterial spin labeling) | As task load increases, CBF/functional connectivity more spatially correlated, dependent upon network |
| Allen et al., 2017 | Humans | Windowed correlation (60 s) clustered into states | EEG power (2 s windows) | States have distinct EEG spectra, one state that only occurs with eyes closed was linked to reduced alpha and increased delta and theta power |
| Ridley et al., 2017 | Humans | Windowed nonlinear covariance (90 s) | Intracranial EEG power (5 s windows, epilepsy patients) | Dynamic rsfMRI correlates to dynamic connectivity in alpha, beta, and gamma bands only in non-seizure regions |
| Grooms et al., 2017 | Humans | Windowed correlation (50 s), QPP | EEG infraslow amplitude (0.01–0.08 Hz) | Dynamic EEG-fMRI coupling produces patterns similar to static rsfMRI networks, QPP strength directly correlates |