Analysis of Residual Dependencies of Independent Components Extracted from fMRI Data
(a)–(d) The IC maps superimposed upon an anatomical T1 weighted image and thresholded with for different model orders are shown. The orientation is RAI. A color bar for the correspondence between color and value is shown. (a) Consistently task related (CTR, ) IC for real dataset with model order equal to 5. (b) ICs maps extracted with model order equal to 10. Component #2 (TTR, ) pertains the SMA and Brodmann area 5 activity. The component number 7 (CTR, ) is related to right and left precuneus, in the primary sensory and motor areas while the component #9 (CTR, ) is related to contralateral primary motor area (the orientation is RAI), SMA, and right precuneus. (c) Resulting ICs from real dataset with model order equal to 15. The component #10 (CTR, ) is mainly related to the contralateral motor area. The activity in the SMA and Brodmann area 5 is mainly described by component #12 (TTR, ). The component #15 (CTR, ) describes the ipsilateral and contralateral sensory areas and right precuneus. (d) CTR ICs for real dataset with model order equal to 20. The component #7 (TTR, ) is related to SMA activity and Brodmann area 5. The component #12 (CTR, ) is mainly related to the contralateral motor area, SMA, and Brodmann area 5 as well. The activity in the precuneus is mainly described by component #13 (CTR, ). The activity of contralateral and ipsilateral sensory areas is described by map #14 (CTR, ). (e) GLM analysis results of the real fMRI dataset. The value of test about the parameter of interest is shown. A color bar related to values is shown.