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Related Experiment Videos

Functional connectivity in single and multislice echoplanar imaging using resting-state fluctuations

M J Lowe1, B J Mock, J A Sorenson

  • 1Department of Medical Physics, University of Wisconsin, Madison, USA.

Neuroimage
|April 29, 1998
PubMed
Summary
This summary is machine-generated.

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Resting-state functional MRI reveals correlations between brain regions in both hemispheres. These findings are confirmed with whole-body MRI, extending to other brain areas despite lower sampling rates.

Area of Science:

  • Neuroscience
  • Magnetic Resonance Imaging

Background:

  • Previous studies reported correlations in low-frequency resting-state fluctuations between motor cortices.
  • Echoplanar imaging (EPI) is a common MRI technique for functional studies.

Purpose of the Study:

  • To confirm previous findings of resting-state functional correlations between hemispheres.
  • To extend these findings to lower sampling rate EPI acquisitions and other brain regions.

Main Methods:

  • Utilized a whole-body echoplanar MRI scanner at 1.5 T.
  • Acquired data using both rapidly sampled single-slice and lower sampling rate multislice EPI sequences.
  • Combined data from three healthy right-handed male subjects during long resting-state scans.

Main Results:

Related Experiment Videos

  • Confirmed correlations in low-frequency resting-state fluctuations between right and left hemisphere motor cortices.
  • Extended these correlations to lower sampling rate multislice EPI acquisitions and other symmetric functional cortices.
  • Observed reduced specificity in lower sampling rate acquisitions due to cardiac and respiratory artifacts.

Conclusions:

  • Resting-state functional MRI demonstrates interhemispheric correlations in motor cortices, reproducible with whole-body EPI.
  • These correlations can be observed in lower sampling rate acquisitions, though with reduced specificity.
  • Further investigation is needed to mitigate artifacts in lower-resolution functional MRI data.