Figure 1.
Increase in activity from rest to 0-, 1-, 2-, and 3-back in right DLPFC (a) and AC (b) as a function of individual E score. Memory load-related fMRI signal changes (increases from rest) in right DLPFC (c) and AC (d) in groups with high (≥17) and low (≤9) E scores. e, Activation, thresholded at p < 0.001 (uncorrected), in three individual subjects with E scores of 4 (left), 15 (middle), and 21 (right), superimposed on their own individual structural images. I, Introversion. Color bar shows SPM-derived T values. Task load-related activity in the DLPFC and AC, but not in superior parietal cortex, varied systematically with E. Axial view with associated z coordinates is shown; left hemisphere is shown on the left.