Comparison of rCBF between patients with FM and age-matched healthy controls. Maximum intensity projections of SPM2 results from comparison of rCBF between patients with FM and age-matched healthy controls. a, b The FM patient group exhibited significant hypoperfusion in the left culmen. c, d The FM patient group exhibited significant hyperperfusion in the right precentral gyrus, right posterior cingulate, right superior occipital gyrus, right cuneus, left inferior parietal lobule, right middle temporal gyrus, left postcentral gyrus, and left superior parietal lobule. Height threshold is < 0.001, corrected for multiple comparison.