2008
DOI: 10.1016/j.neuroimage.2008.01.054
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Abstract: Functional MRI (fMRI) studies of tasks involving orofacial motion, such as speech, are prone to problems related to motion-induced magnetic field variations. Orofacial motion perturbs the static magnetic field, leading to signal changes that correlate with the task and corrupt activation maps with false positives or signal loss. These motion-induced signal changes represent a contraindication for the implementation of fMRI to study the neurophysiology of orofacial motion. An fMRI experiment of a structured, no… Show more

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Cited by 9 publications
(7 citation statements)
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“…Furthermore, after spatial smoothing, we found no significant differences in functional connectivity either computed from task-selected ROIs or traditional spherical ROIs as a function of spatial resolution. Consequently, studies may wish to have the flexibility to capitalize on the improved ability to resolve fine spatial structures and increased specificity (Yoo et al 2004; Soltysik and Hyde 2008) from higher resolution fMRI data. Similarly, the reduced temporal SNR of fMRI data acquired with a SENSE acceleration factor of 2 is offset by the greater number of images collected, resulting in few significant differences in detection power of either functional activation or connectivity after spatial smoothing.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, after spatial smoothing, we found no significant differences in functional connectivity either computed from task-selected ROIs or traditional spherical ROIs as a function of spatial resolution. Consequently, studies may wish to have the flexibility to capitalize on the improved ability to resolve fine spatial structures and increased specificity (Yoo et al 2004; Soltysik and Hyde 2008) from higher resolution fMRI data. Similarly, the reduced temporal SNR of fMRI data acquired with a SENSE acceleration factor of 2 is offset by the greater number of images collected, resulting in few significant differences in detection power of either functional activation or connectivity after spatial smoothing.…”
Section: Resultsmentioning
confidence: 99%
“…I sensed a great opportunity [372385]. We contemplated and then submitted a Program Project Proposal to the NIH, which was successful on the second try.…”
Section: Mri Researchmentioning
confidence: 99%
“…We hypothesized that the high spatial resolution (HR) protocol could reveal more significant and spatially-specific activations in response to viewing pictures of food in normal-weight subjects. In order to capitalize on the improved ability of high spatial resolution fMRI data to resolve fine spatial structures [ 38 ], it is necessary to adapt the width of the smoothing kernel to the true size of activation and to the contrast-to-noise ratio [ 39 ], both being a priori unknown. This is why both datasets were analysed using different smoothing sizes for selecting the appropriate coarser resolution in any anatomical region-of-interest (ROI).…”
Section: Introductionmentioning
confidence: 99%