Meeting Banner
Abstract #2847

Fractal-Based Analysis of fMRI BOLD Signal During Naturalistic Viewing Conditions

Olivia Campbell1,2, Tamara Vanderwal2,3, and Alexander Mark Weber1,2,4,5
1School of Biomedical Engineering, University of British Columbia, Vancouver, BC, Canada, 2BC Children's Hospital Research Institute, Vancouver, BC, Canada, 3Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada, 4Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada, 5Department of Neuroscience, University of British Columbia, Vancouver, BC, Canada

Synopsis

We investigated the difference between the brain’s fractal dynamics during movie-watching and resting-state conditions using 7T fMRI data. During movie-watching, we find that the BOLD signal becomes more scale-invariant and self-similar than during the resting-state. This supports the idea that movie-watching evokes a state of optimal neural functioning that may better reflect the endogenous state of the brain than a fixed cross-hair. We also find that fractal properties differ greatly across functional networks, providing novel information about the temporal dynamics of each network during naturalistic processing. Overall, these findings advance understanding of both fractal dynamics and naturalistic viewing in fMRI.

This abstract and the presentation materials are available to members only; a login is required.

Join Here