Analysis of Residual Dependencies of Independent Components Extracted from fMRI Data

Figure 5

(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.

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