| Literature DB >> 24008589 |
Cheryl L Grady1, Douglas D Garrett.
Abstract
Recent work in neuroscience supports the idea that variability in brain function is necessary for optimal brain responsivity to a changing environment. In this review, we discuss a series of functional magnetic resonance imaging (fMRI) studies in younger and older adults to assess age-related differences in variability of the fMRI signal. This work shows that moment-to-moment brain signal variability represents an important "signal" within what is typically considered measurement-related "noise" in fMRI. This accumulation of evidence suggests that moving beyond the mean will provide a complementary window into aging-related neural processes.Mesh:
Substances:
Year: 2014 PMID: 24008589 PMCID: PMC3922711 DOI: 10.1007/s11682-013-9253-0
Source DB: PubMed Journal: Brain Imaging Behav ISSN: 1931-7557 Impact factor: 3.978