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1,248 claims from 785 papers are on the record. 45 have been checked so far; the other 1,203 have no check with a result yet.

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Status: Unchecked ×Keyword: head movement ×Clear all

6 claims from 3 papers

1. Neuroscience › Functional Brain Connectivity Studies

   Methods to detect, characterize, and remove motion artifact in resting state fMRI

   Power, Mitra, Laumann, Snyder, Schlaggar and Petersen · NeuroImage · 2013

   The paper examines how head motion alters fMRI signal and connectivity correlations, tests ways to remove it, and shows that censoring high-motion volumes reduces motion-related group differences to chance levels.

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   1. UncheckedSignal changes caused by head motion, during and after movement, raise resting-state fMRI correlations in a way that depends on the distance between brain regions.“These signal changes, both during and after motion, increase observed RSFC correlations in a distance-dependent manner.”

2. Neuroscience › Functional Brain Connectivity Studies

   The influence of head motion on intrinsic functional connectivity MRI

   Van Dijk, Sabuncu and Buckner · NeuroImage · 2011

   In 1000 healthy young adults scanned at rest, head motion had systematic effects on functional connectivity MRI measures, though most variation between people was not linked to motion.

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   1. UncheckedIn 1000 healthy young adults, more head motion during scanning was linked to weaker functional coupling in the default and frontoparietal control networks.“Head motion was associated with decreased functional coupling in the default and frontoparietal control networks--two networks characterized by coupling among distributed regions of association cortex.”
   2. UncheckedIn this study, some brain network measures rose with head motion, including local coupling and coupling between left and right motor regions.“Other network measures increased with motion including estimates of local functional coupling and coupling between left and right motor regions--a region pair sometimes used as a control in studies to establish specificity.”

3. Neuroscience › Functional Brain Connectivity Studies

   On the Stability of BOLD fMRI Correlations

   Laumann, Snyder, Mitra et al. · Cerebral Cortex · 2016

   Using simulations and several sets of fMRI data, the paper finds that task states change BOLD correlations, but apparent changes during rest are mostly sampling variability, head motion and sleep state.

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   1. UncheckedIn resting-state fMRI, apparent moment-to-moment changes in brain-region correlations are largely explained by sampling variability.“However, we find that observations of "dynamic" BOLD correlations during the resting state are largely explained by sampling variability.”
   2. UncheckedAfter sampling variability, head motion accounts for the largest share of apparent changes in brain-region correlations during rest, according to this paper.“Beyond sampling variability, the largest part of observed "dynamics" during rest is attributable to head motion.”
   3. UncheckedSome of the apparent moment-to-moment variation in brain-region correlations during rest is attributed to changes in how awake or asleep people are.“An additional component of dynamic variability during rest is attributable to fluctuating sleep state.”