Table 2.
Volumetric variability following shape standardization
| Structure | Standard deviation (mm3)
|
Variance
|
||
|---|---|---|---|---|
| aGSNa | ISSN | Explained | Unexplained | |
| Whole brain (N=40) | 11,947 | 11,947 | 0 | 100% |
| Hemispheres (N=40) | 16,216 | 9,996 | 62% | 38% |
| Cerebellum (N=38) | 11,803 | 2,751 | 95% | 5% |
| Brainstem (N=40) | 2,261 | 1,075 | 77% | 23% |
| L IFG (N=30) | 4,344 | 1,590 | 87% | 13% |
| R IFG (N=34) | 5,318 | 1,668 | 90% | 10% |
| L precuneus (N=37) | 1,668 | 826 | 75% | 25% |
| R precuneus (N=38) | 1,498 | 679 | 76% | 24% |
| L putamen (N=40) | 489 | 320 | 57% | 43% |
| R putamen (N=40) | 447 | 320 | 56% | 44% |
| L Hcp (N=40) | 347 | 200 | 67% | 33% |
| R Hcp (N=40) | 426 | 205 | 76% | 24% |
| L caudate (N=40) | 447 | 333 | 51% | 49% |
| R caudate (N=40) | 554 | 265 | 77% | 23% |
a
Standard deviation for whole brain shape normalization called aGSN (Lancaster et al. 2010).