Functional and anatomical magnetic resonance images were obtained for each participant using either a Siemens Trio 3 Tesla (T) (Siemens AG, Erlangen, Germany) or a General Electric Signa Excite 3T (General Electric Healthcare, Milwaukee, Wisconsin) scanner. A time series of 128 echo-planar image volumes was acquired at 36 axial slice locations throughout the whole brain. Participants were asked to direct their attention to crosshairs projected onto a screen during image acquisition and not think of anything. Each scanner acquired images from normal controls and patients. The Siemens scanner acquired images from seven controls and nine patients, and the GE acquired images from nine controls and sixteen patients. The echo-planar image data acquired by the Siemens scanner were obtained with single-shot gradient-recalled pulse sequence, TR = 2 seconds, echo time = 25 milliseconds, flip angle, 90°; matrix, 64 × 64; field of view (FOV) 210 mm, and 3.5 mm slice thickness). High-resolution T1-weighted structural images acquired by the Siemens scanner were acquired using MP-RAGE with Slice thickness 1.0mm, FOV 240 mm, and TE/TI/TR 4/900/2250 ms, flip angle 9°, NEX 1. Echo-planar
