title: Roles of multiscale brain activity fluctuations in shaping the variability and dynamics of psychophysical performance.
abstract: Spontaneous brain activity across many time scales influences sensory perception and human cognitive performance. Empirical insight into the underlying systems-level mechanisms has, however, remained fragmented. We review here recent studies on how wideband scale-free and scale-specific neuronal activity fluctuations together bias sensory processing and perceptual performance. We posit that these fluctuations constitute the neurophysiological foundation for both the trial-to-trial behavioral variability and the scaling laws governing psychophysical performance.
authors.affiliation: Neuroscience Center, University of Helsinki, Helsinki, Finland. matias.palva@helsinki.fi
authors.forename: J Matias
authors.initials: JM
authors.lastname: Palva
authors.forename: Satu
authors.initials: S
authors.lastname: Palva
mesh_terms: D000818:Animals; D001519:Behavior / Q000502:physiology; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D003071:Cognition / Q000502:physiology; D004569:Electroencephalography; D006801:Humans; D008279:Magnetic Resonance Imaging; D008959:Models, Neurological; D009474:Neurons / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*