. Author manuscript; available in PMC: 2011 Dec 6.

Published in final edited form as: Magn Reson Imaging. 2010 Feb 1;28(3):351–362. doi: 10.1016/j.mri.2009.11.010

Table 5.

Relation of Activation of ROIs from the Parieto-frontal Number Processing Network to Task Performance

Region	Proximity Judgment (N = 15)	Exact Addition (N = 14)
Horizontal intraparietal sulcus; anterior^a	.35	−.28
Horizontal intraparietal sulcus; posterior^a	.65^**	−.21
L precentral sulcus	.46^†	−.37^b
R, L posterior medial frontal cortex	.24	−.45^†
R anterior insula	.66^**	−.18
L anterior insula	.25	−− ^c
Composite measure^d	.57^**	−.36

Values are Pearson r. Regional activations are based on mean % signal change (task minus control task) for ROIs derived from the Proximity Judgment (PJ) task for the correlations with PJ performance and from the Exact Addition (EA) task for the correlations with EA performance. Performance is measured by number of problems answered correctly.

Right anterior horizontal intraparietal sulcus for PJ; left, for EA.

The larger of the two ROI clusters emerging at the left precentral sulcus for EA (−42, 18, 28) was examined here.

ROI did not reach threshold in the whole brain analysis.

Factor scores derived from factor analyses of the mean % signal change values for the PJ and EA ROIs listed in this table, respectively.

^†

p < .10

p < .05

^**

p < .01