Nondisplaceable binding potentials for [18F]FPEB for men with FXS or ASD or healthy controls (HC)
| Volume of interest | FXS | ASD mean | ASD standard deviation | HC mean | HC standard deviation |
| Whole cortex | 2.46 | 3.10 | 0.17 | 3.09 | 0.17 |
| Cingulate | 2.89 | 3.51 | 0.26 | 3.48 | 0.25 |
| Caudate nucleus | 2.05 | 2.83 | 0.40 | 2.88 | 0.46 |
| Cerebellum | 0.50 | 0.65 | 0.07 | 0.68 | 0.10 |
| Hippocampus | 1.56 | 2.33 | 0.28 | 2.45 | 0.40 |
| Postcentral gyrus | 2.33 | 2.82 | 0.28 | 2.68 | 0.15 |
| Precuneus | 2.76 | 3.18 | 0.28 | 3.06 | 0.12 |
| Putamen | 2.01 | 3.06 | 0.25 | 3.06 | 0.11 |
| Ventral striatum | 2.65 | 3.65 | 0.36 | 3.42 | 0.11 |