Brain regions whose activity correlated with the slow and fast fluctuation components of the EEG alpha power and the comparison between the slow and fast fluctuation components (<i>p</i>-value, cluster-level FWE of 0.05).

<p>Brain regions whose activity correlated with the slow and fast fluctuation components of the EEG alpha power and the comparison between the slow and fast fluctuation components (<i>p</i>-value, cluster-level FWE of 0.05).</p

Comparison between the brain regions positively correlated with the slow and fast fluctuation components.

<p>Statistical results are superimposed on an averaged MRI (Uncorrected p<0.001, a cluster level FWE of 0.05). The yellow-red color on the brain images indicates the significant difference between the slow and fast fluctuation components (slow > fast). The color bars at the bottom of the figure show t-values between 3.5 and 6.5. The number in the upper right of each slice indicates a MNI coordinate. The letters in the figure indicate the direction of each brain image (L: left; R: right; P: posterior).</p

Group analysis of the correlations between IMFs and the BOLD signal on fMRI.

<p>In the upper panel, the positive (red-yellow) correlation maps in the multiple axial planes are superimposed on a standard brain template according to the Montreal Neurological Institute (MNI) coordinate <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066869#pone.0066869-Bush1" target="_blank">[61]</a>. The positive correlation maps for each IMF are shown in the sagittal planes at an X coordinate of +2 mm, a Y coordinate of −10 mm, and a Z coordinate of 10 mm and −16 mm in the MNI coordinate. In the bottom panel, the negative (blue-green) correlation maps for each IMF are rendered on a standard template brain image. Only the areas with a peak-level uncorrected p<0.001 and a cluster-level FWE of 0.05 by random-effect analysis are shown. The color bars show t-values between 3.5 and 6.5. The letters in the figure indicate the direction of each brain image (L: left; R: right; P: posterior; D: dorsal).</p

Positive correlation maps between the slow and fast fluctuation of the APTS and the BOLD signal.

<p>Only the areas with a peak-level uncorrected p<0.001 and a cluster-level FWE of 0.05 are shown in the random-effect analysis. Statistical results are superimposed on an averaged MRI. The green and orange colors on the brain images indicate the correlation between the BOLD signals and the slow and fast fluctuation components, respectively. The color bars at the bottom of the figure show t-values between 3.5 and 6.5. Numbers in the bottom right of each slice show the coordinates according to the MNI space. Upper: Sagittal and coronal planes. Lower: Multiple axial planes. The letters in the figure indicate the direction of each brain image (L: left; P: posterior).</p

Brain regions whose activity correlated with the power of the EEG alpha rhythm (<i>p</i>-value, cluster-level FWE of 0.05).

<p>Brain regions whose activity correlated with the power of the EEG alpha rhythm (<i>p</i>-value, cluster-level FWE of 0.05).</p

Brain regions whose activity negatively correlated with the IMFs components of the EEG alpha power (<i>p</i>-value, cluster-level FWE of 0.05).

<p>Brain regions whose activity negatively correlated with the IMFs components of the EEG alpha power (<i>p</i>-value, cluster-level FWE of 0.05).</p

Calculation of the EEG alpha power time series (APTS) and intrinsic mode functions (IMFs).

<p>A: After removal of the MRI and ballistocardiogram artifacts, the EEG data from the four bipolar channels were subjected to frequency analysis using fast Fourier transform (FFT) for each 3-second segment (gray in the upper panel). The powers of the alpha band across the four bipolar channels were averaged. The averaged power values were then temporally aligned as the APTS, as shown in the bottom panel. A scalp topography of alpha power of a single subject is shown in the right middle panel. Note that the topography is described by EEG data of a unipolar induction, and L indicates the left side of the brain. B: An example of the IMFs for a single subject. An APTS of a single subject is shown in the upper panel. Next, the IMFs separated by the empirical mode decomposition (EMD) from the APTS were shown from the first to the fifth IMF.</p

Brain regions whose activity positively correlated with the IMFs components of the EEG alpha power (<i>p</i>-value, cluster-level FWE of 0.05).

<p>Brain regions whose activity positively correlated with the IMFs components of the EEG alpha power (<i>p</i>-value, cluster-level FWE of 0.05).</p

Group analysis of the correlations between alpha power fluctuation and the BOLD signal on fMRI.

<p><i>A</i>: The positive (red-white) and negative (blue-green) correlation maps in the multiple axial planes are superimposed on a standard brain template according to the Montreal Neurological Institute (MNI) coordinate <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066869#pone.0066869-Bush1" target="_blank">[61]</a>. The number in the bottom right of each slice indicates a Z coordinate in the MNI space. <i>B</i>: The positive and negative correlation maps in the sagittal planes at an X coordinate of +8 mm in the MNI coordinate. Only the areas with a peak-level uncorrected p<0.001 and a cluster-level FWE of 0.05 by random-effect analysis are shown. The color bars show t-values between 3.5 and 6.5. The letters in the figure indicate the direction of each brain image (L: left; R: right; P: posterior).</p

Bulletin officiel des contributions directes et du cadastre / Direction générale des impôts

19361936 (A1936,N7,PART2)