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Figure 2a. (a) Diagrammatic representation of brain activation induced by left-hand finger tapping. All six results (three MR imaging sessions times two task runs) are shown for subject 7, who showed poor task repeatability (RI = 0.13). Within each block, sagittal (top left image), coronal (top right image), and transverse (bottom left image) projections are shown. (b) Corresponding transverse MR image sections overlaid with a reliability map show numbers of times (out of maximum of six) voxels in the motor cortex were classified as activated during six runs of the finger-tapping task. Colors range from dark blue (indicating voxels were classified as activated one time) to red (six times). Background images are a template derived from the mean of 20 normalized inversion-recovery-prepared gradient-echo MR images (8/3.4/600, 15° flip angle) obtained in a group of healthy elderly men. Images are shown in neurologic convention (ie, image left corresponds to subject left).
