Table 2.
Volume Percentages of Each of the Seven Inferior Parietal Lobule Clusters
| lbIPS | SMG | AG | ||||
|---|---|---|---|---|---|---|
| Clusters | A% | B% | A% | B% | A% | B% |
| Anterior IPL | 32 | 40 | 62 | 58 | 1 | 2 |
| Dorsal-anterior IPL (cluster 3) | 32 | 75 | 12 | 23 | 1 | 2 |
| Ventral-anterior IPL (cluster 2) | 0 | 0 | 50 | 100 | 0 | 0 |
| Middle IPL | 64 | 50 | 37 | 27 | 30 | 23 |
| Dorsal anterior-middle IPL (cluster 4) | 23 | 60 | 18 | 40 | 0 | 0 |
| Ventral anterior-middle IPL (cluster 7) | 1 | 8 | 13 | 79 | 2 | 13 |
| Lateral posterior-middle IPL (cluster 1) | 21 | 57 | 6 | 13 | 15 | 30 |
| Medial posterior-middle IPL (cluster 5) | 19 | 67 | 0 | 0 | 13 | 33 |
| Posterior IPL | 4 | 7 | 1 | 1 | 69 | 92 |
| Posterior IPL (cluster 6) | 4 | 7 | 1 | 1 | 69 | 92 |
A%=Vij/Vj and B%=Vij/Vi, where i=our cluster 1, 2,…, 7; j=lbIPS, SMG, and AG; Vij is the number of voxels from the intersection of our cluster i and lbIPS/SMG/AG; Vi is the number of voxels from our cluster i; and Vj is the number of voxels from lbIPS/SMG/AG.
A%, the volume percentage of the cluster relative to the lbIPS/SMG/AG; B%, the volume percentage of voxels within the lbIPS/SMG/AG relative to the whole cluster.
IPL, inferior parietal lobule; lbIPS, intraparietal sulcus; SMG, supramarginal gyrus; AG, angular gyrus.