Fig. 3.

Brain activation showing the Group × Fatigue interaction (that is, areas where the effect of fatigue differed between the GWI and HC groups). The two top panels show the coronal (top left) and sagittal (top right) views of the brain. The bottom left panel shows the axial view. The blue arrow indicates the caudate nucleus (XYZ coordinates = −14, 14, 22 in MNI space), and the data from this area is shown in the inset graph (bottom right). The colors represent the F statistic, ranging from 0 to 12.7. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)