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. Author manuscript; available in PMC: 2011 Feb 15.
Published in final edited form as: Neuroimage. 2009 Nov 14;49(4):3436. doi: 10.1016/j.neuroimage.2009.11.019

Table 2. Spatial distribution of correlation of accuracy with brain functional MRI activation during sDSST task performance.

This table reports the spatial distribution of the association of accuracy with the mean group activation (obtained from the sDSST > control condition contrast), including the size of cluster, the maximum Z statistic for the cluster and the location of the maximum Z statistic in Talairach coordinates. The analyses were adjusted for group assignment, atrophy index and sDSST response time. The corrected alpha is the probability of a false positive detection based on the combination of individual voxel probability thresholding and minimum cluster size thresholding.

Regions Cluster
Size		 Peak Z-
Score		 Talairach Coordinate for
Peak Z-Score
Regions positively correlated with accuracy during sDSST performance
Left prefrontal cortex 968 3.25 −45.54, −8.17, 30.81
Right posterior parietal cortex 451 2.84 35.64, −53.56, 55.182
Regions negatively correlated with accuracy during sDSST performance
No significant voxels
1

This cluster had its peak in the left precentral gyrus (BA 6) extended to middle and prefrontal gyri (BA 4, 9, 44), and covered postcentral gyrus (BA 40, 43) and superior temporal gyrus (BA 42).

2

This cluster had its peak in the right superior parietal lobule medially (BA 7) and extended to the inferior parietal lobule (BA 40).