Table 1 Defined regions of interest (ROIs)
From: Impaired neural networks for approximate calculation in dyscalculic children: a functional MRI study
Condition | Talairach coordinates | Volume (mm 3 ) | ||
|---|---|---|---|---|
| Â | x | y | z | Â |
Approximate calculation | Â | Â | Â | Â |
   Left intraparietal sulcus (IPS) | -45 to -6 | -80 to -35 | 32 to 52 | 6588 |
   Right intraparietal sulcus (IPS) | 18 to 36 | -78 to -53 | 23 to 50 | 4401 |
   Left inferior frontal gyrus (IFG) | -39 to -27 | 14 to 26 | -8 to 4 | 1458 |
   Right inferior frontal gyrus (IFG) | 24 to 45 | 14 to 33 | -13 to 9 | 4023 |
   Left middle frontal gyrus (MFG) | -33 to -18 | -10 to 9 | 42 to 60 | 2916 |
   Right middle frontal gyrus (MFG) | 27 to 50 | 27 to 51 | 12 to 31 | 4536 |
   Anterior cingulate gyrus (ACG) | -12 to 15 | 2 to 29 | 30 to 54 | 5535 |
Exact calculation | Â | Â | Â | Â |
   Left inferior frontal gyrus (IFG) | -39 to -27 | 15 to 30 | -1 to 12 | 1161 |
   Left fusiform gyrus (FG) | -48 to -36 | -75 to -55 | -16 to -2 | 1448 |
   Left intraparietal sulcus (IPS) | -42 to -24 | -65 to -44 | 36 to 52 | 2295 |
   Right intraparietal sulcus (IPS) | 24 to 51 | -74 to -38 | 26 to 46 | 3504 |
Magnitude comparison | Â | Â | Â | Â |
   Left fusiform gyrus (FG) | -45 to -6 | -97 to -43 | -23 to 5 | 6480 |
   Right fusiform gyrus (FG) & right middle occipital gyrus (MOG) | 6 to 44 | -94 to -48 | -21 to 21 | 6376 |
   Right intraparietal sulcus (IPS) | 21 to 30 | -77 to -62 | 37 to 47 | 1323 |