Cited by 127Functional Brain Connectivity StudiesNeural dynamics and brain functionAdvanced MRI Techniques and Applications

Ongoing physiological processes in the cerebral cortex

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Leopold, David A., Maier, Alexander·2012·NeuroImage

Abstract

Functional magnetic resonance imaging (fMRI) has revealed that the human brain undergoes prominent, regional hemodynamic fluctuations when a subject is at rest. These ongoing fluctuations exhibit distinct patterns of spatiotemporal synchronization that have been dubbed "resting state functional connectivity", and which currently serve as a principal tool to investigate neural networks in the normal and pathological human brain. Despite the wide application of this approach in human neuroscience, the neural mechanisms that give rise to spontaneous fMRI correlations are largely unknown. Here we review results of recent electrophysiological studies in the cerebral cortex of humans and nonhuman primates that link neural activity to ongoing fMRI fluctuations. We begin by describing results obtained with simultaneous fMRI and electrophysiological measurements that allow for the identification of direct neural correlates of resting state functional connectivity. We next highlight experiments that investigate the correlational structure of spontaneous neural signals, including the spatial variation of signal coherence over the cortical surface, across cortical laminae, and between the two hemispheres. In the final section we speculate on the origins and potential consequences of ongoing signals for normal brain function, and point out inherent limitations of the fMRI correlation approach.

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  1. Raichle ME Neuroscience. The brain's dark energy. Science 2006 314 1249 1250 17124311

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Authors
Leopold, D. A., & Maier, A.
Affiliations
National Institutes of Health (US)
Corresponding author
Leopold, David A.
Venue
NeuroImage
Publisher
Elsevier BV
Published
2012-10
Volume
62
Issue
4
Pages
2190-2200
ISSN
1053-8119 (ISSN-L)
OpenAlex
W2125006647
Cited by
127
References
86
Citations by year
2026: 5 · 2025: 3 · 2024: 4 · 2023: 2 · 2022: 3 · 2021: 8 · 2020: 3 · 2019: 8 · 2018: 13 · 2017: 7 · 2016: 16 · 2015: 14 · 2014: 17 · 2013: 17 · 2012: 7
FWCI
1.12
Type
journal article
Language
en
Open access
Locations
  • NeuroImage (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Mental Health (ZICMH002899, ZIAMH002896)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
Keywords
resting-state functional connectivity, spontaneous neuronal activity, cerebral cortex, hemodynamic fluctuations, signal coherence, cortical layers, interhemispheric synchronization, neural network dynamics, non-human primates
MeSH terms
Animals, Brain Mapping, Cerebral Cortex, Humans, Magnetic Resonance Imaging

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