Table 2.
Within-group results indicating significant brain activation during the math tasks
| Task |
P-value (corrected) |
No. of voxels |
Z-score | Peak location (Talairach coordinates) |
Activation description |
|---|---|---|---|---|---|
| Two-operand | |||||
| Control | <0.0001 | 2936 | 3.77 | −44, 34, 20 | Left middle frontal gyrus extending into inferior frontal and precentral gyri |
| <0.0001 | 2581 | 4.30 | −24, −70, 46 | Left superior parietal lobule extending into supramarginal gyrus, angular gyrus and intraparietal sulcus | |
| <0.0001 | 2483 | 4.54 | 42, −50. 45 | Right supramarginal gyrus extending into angular gyrus, intraparietal sulcus and superior parietal lobule | |
| <0.0001 | 1017 | 4.34 | 16, 2, 7 | Right putamen extending into caudate | |
| 0.0001 | 949 | 4.36 | −46, −55, −14 | Left fusiform | |
| TS | <0.0001 | 6424 | 4.08 | 8, 27, 32 | Right superior frontal gyrus extending into anterior cingulate |
| <0.0001 | 3821 | 4.39 | −42, −44, 43 | Left supramarginal gyrus extending into angular gyrus, intraparietal sulcus and superior parietal lobule | |
| <0.0001 | 2593 | 3.68 | 42, 36, 20 | Bilateral middle and inferior frontal gyri extending into left pre- and postcentral gyri | |
| <0.0001 | 1853 | 4.10 | 24, −56, 36 | Right supramarginal gyrus extending into angular gyrus, intraparietal sulcus and superior parietal lobule | |
| 0.003 | 853 | 3.31 | −44, −72, −10 | Left middle occipital gyrus extending into fusiform | |
| Three-operand | |||||
| Control | <0.0001 | 15625 | 5.35 | −24, −68, 48 | Left superior parietal lobule extending into supramarginal and angular gyri, intraparietal sulcus, fusiform, cuneus, middle temporal gyrus inferior, middle and superior frontal gyri, precentral gyrus, putamen and caudate |
| <0.0001 | 2534 | 4.21 | 28, −68, 46 | Right superior parietal lobule extending into supramarginal gyrus, angular gyrus, intraparietal sulcus, cuneus, middle temporal gyrus inferior, middle and superior frontal gyri, precentral gyrus, putamen and caudate | |
| TS | <0.0001 | 1814 | 3.71 | −46, 5, 29 | Left precentral gyrus extending into middle and inferior frontal gyri |
| <0.0001 | 1452 | 3.51 | −22, −79, 45 | Left superior occipital gyrus extending into supramarginal gyrus, angular gyrus, intraparietal sulcus | |
| <0.0001 | 1163 | 3.72 | 38, −49, 36 | Right supramarginal and angular gyri | |
| 0.008 | 760 | 3.72 | −30, −47, −13 | Left fusiform | |
| 0.017 | 684 | 3.63 | 2, 20, 47 | Right superior frontal gyrus extending into anterior cingulate |
Thresholds: height (Z > 1.67; P < 0.05) and extent (P < 0.05).