Figure 3. Twenty-four transverse MR image sections on the group repeatability map generated for nine subjects who participated in a total of 53 task runs show numbers of times (out of maximum of 53) voxels in the motor cortex were classified as activated. Colors range from dark blue (indicating voxels were classified as activated one time) to orange (28 times) during 53 runs of the finger-tapping task. 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).