>> eventRelated.voxel

ans = 

              vox: [61 64 15]
             time: [0.75 2.25 3.75 5.25 6.75 8.25 9.75 11.25 12.75 14.25 15.75 17.25 18.75 20.25 21.75 23.25 24.75]
             ehdr: [3x17 single]
          ehdrste: [3x17 single]
               r2: 0.3391862
          tSeries: [760x1 double]
    tSeriesByStim: {[19x17 double]  [17x17 double]  [18x17 double]}