Impact of Global Normalization in fMRI Acupuncture Studies

Figure 4

Maps and histogram for the paired 𝑡-test between PSGS and NO PSGS. (a) and (b) indicate the paired 𝑡-test map for PSGS < NO PSGS in the acupuncture and tactile runs, respectively. Two thresholds were selected and overlapped on the map: 𝑃<0.001, uncorrected (colored in blue), and 𝑃<0.01, uncorrected (colored in green) with 5 contiguous voxels, respectively. (c) shows the histogram of the paired 𝑡-test between PSGS and NO PSGS. The red line represents the acupuncture run, and the blue line indicates the tactile run. 𝑃<0.001, uncorrected, and 𝑃<0.01, uncorrected, are marked on the histogram.

(a)

(b)