Table 2.
Clusters for which the sigmoid function explained significantly more variance in temperature-related BOLD contrast than did the linear function. Sigmoid threshold temperature is the estimated a3 parameter in the sigmoid function. Numbers in parentheses are standard deviations.
| Cluster location | Talairach coordinates | Cluster size (2 mm3 voxels) | Sigmoid threshold temperature | ||
|---|---|---|---|---|---|
| Right anterior insula (BA 13) | 42 | 11 | 3 | 920 | 47.6 (0.5) |
| Bilateral substantia nigra/red nucleus/PAG | −5 | −14 | −6 | 880 | 47.8 (0.6) |
| Bilateral medial frontal gyrus (BA 6) | 5 | 6 | 51 | 752 | 47.6 (0.6) |
| Bilateral posterior cingulate (BA 23) | 3 | −29 | 26 | 264 | 47.5 (0.8) |
| Left anterior insula (BA 13) | −31 | 14 | 3 | 240 | 47.7 (0.5) |
| Right inferior parietal lobule (BA 40) | 55 | −41 | 29 | 208 | 47.4 (0.9) |
| Bilateral mid-cingulate (BA 24) | 3 | −3 | 34 | 144 | 47.5 (0.7) |
| Right lentiform nucleus/globus pallidus/putamen | 16 | 4 | 0 | 120 | 47.8 (0.5) |
| Right thalamus | 17 | −12 | 12 | 80 | 47.6 (0.8) |
| Right parahippocampal gyrus (BA 27/28) | 25 | −27 | −4 | 72 | 47.8 (0.9) |
| Right posterior insula (BA 13) | 43 | −18 | 17 | 64 | 47.5 (0.6) |
| Left thalamus | −16 | −13 | 7 | 40 | 47.6 (1.0) |
| Right middle temporal gyus | 54 | −32 | −7 | 32 | 47.7 (0.9) |