Cited by 9,812Functional Brain Connectivity StudiesAdvanced MRI Techniques and ApplicationsAdvanced Neuroimaging Techniques and Applications

Functional connectivity in the motor cortex of resting human brain using echo‐planar mri

Biswal, Bharat, Zerrin Yetkin, F., Haughton, Victor M., Hyde, James S.·1995·Magnetic Resonance in Medicine

Abstract

An MRI time course of 512 echo-planar images (EPI) in resting human brain obtained every 250 ms reveals fluctuations in signal intensity in each pixel that have a physiologic origin. Regions of the sensorimotor cortex that were activated secondary to hand movement were identified using functional MRI methodology (FMRI). Time courses of low frequency (< 0.1 Hz) fluctuations in resting brain were observed to have a high degree of temporal correlation (P < 10(-3)) within these regions and also with time courses in several other regions that can be associated with motor function. It is concluded that correlation of low frequency fluctuations, which may arise from fluctuations in blood oxygenation or flow, is a manifestation of functional connectivity of the brain.

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Crossref · 10.1002/mrm.1910340409

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  • Changing the focus from task-based experiments to analyzing spontaneous activity while participants were resting revealed synchronous low-frequency (<0.1 Hz) fluctuations in the BOLD signal that formed coherent networks of neural activity.

    “Changing the focus from task-based experiments to analyzing spontaneous activity while participants were resting revealed synchronous low-frequency (< 0.1 Hz) fluctuations in the BOLD signal that formed coherent networks of neural activity.14”
  • Correlations in low-frequency fluctuations can be used to probe functional brain networks, and these fluctuations reflect coactivation of task-relevant regions.

    “Two observations stood out: correlations in lowfrequency fluctuations could be used to probe functional brain networks, and these fluctuations reflected coactivation of taskrelevant regions.”
  • The first observation of correlated resting-state activity was in bilateral sensorimotor cortex.

    “Correlated resting-state activity was first identified in bilateral sensorimotor cortex by (Biswal et al., 1995)”
  • Functional connectivity provides detailed spatial maps of putatively functionally related regions.

    “This method of functional connectivity (8), first applied to mapping the motor cortical system (9), provides remarkably detailed spatial maps of putatively functionally related regions (10).”
  • Resting-state functional connectivity MRI assesses spontaneous intrinsic correlated BOLD activity while subjects are not performing a specific task.

    “Rs-fcMRI assesses spontaneous intrinsic correlated blood oxygen level dependent (BOLD) activity while subjects are not performing a specific task (Biswal et al., 1995; Fair et al., 2007; Fox and Raichle, 2007).”

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Authors
Biswal, B., Zerrin Yetkin, F., Haughton, V. M., & Hyde, J. S.
Affiliations
Medical College of Wisconsin (US)
Corresponding author
Hyde, James S.
Venue
Magnetic Resonance in Medicine
Publisher
Wiley
Published
1995-10
Volume
34
Issue
4
Pages
537-541
ISSN
  • 0740-3194 (ISSN-L)
  • 1522-2594
OpenAlex
W2009494091
Cited by
9,812
References
8
Citations by year
2026: 332 · 2025: 425 · 2024: 522 · 2023: 483 · 2022: 572 · 2021: 686 · 2020: 606 · 2019: 591 · 2018: 623 · 2017: 627 · 2016: 585 · 2015: 622 · 2014: 621 · 2013: 601 · 2012: 461
FWCI
9.24
Type
journal article
Language
en
Open access
closed
Locations
  • Magnetic Resonance in Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01ca041464-14)
  • National Cancer Institute (CA41464)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
Keywords
functional connectivity, resting-state brain, motor cortex, sensorimotor cortex, echo-planar MRI, temporal correlation, blood oxygenation level-dependent signal, BOLD signal
MeSH terms
Acoustic Stimulation, Adult, Brain, Cerebrovascular Circulation, Electroencephalography, Female, Fingers, Hand, Humans, Magnetic Resonance Imaging, Male, Motor Cortex, Motor Skills, Movement, Neurons, Oxygen, Photic Stimulation, Psychomotor Performance, Rest, Somatosensory Cortex, Echo-Planar Imaging

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