Table 2. Summary of mean values and standard deviations (SD) of the MWF of WM ROIs for the young (N=8) and old (N=8) macaques.
| MWF (%) | Left hemisphere | Right hemisphere | Between hemispheres | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Young (mean ± SD) | Old (mean ± SD) | P value | Young (mean ± SD) | Old (mean ± SD) | P value | Young (P value) | Old (P value) | |||
| ALIC | 10.083±5.184 | 17.982±4.028 | 0.004 | 9.245±3.456 | 18.901±3.368 | <0.001 | 0.443 | 0.289 | ||
| PLIC | 13.694±2.940 | 16.516±2.556 | 0.060 | 13.269±2.855 | 17.793±2.062 | 0.003 | 0.291 | 0.115 | ||
| GCC | 8.160±1.807 | 10.950±3.198 | 0.050 | 8.087±2.008 | 10.334±3.545 | 0.141 | 0.896 | 0.401 | ||
| BCC | 11.453±2.569 | 13.589±3.513 | 0.187 | 11.262±2.593 | 13.347±2.654 | 0.134 | 0.390 | 0.708 | ||
| SCC | 11.364±2.576 | 12.682±3.884 | 0.437 | 10.633±2.558 | 13.444±2.914 | 0.059 | 0.460 | 0.622 | ||
| OT | 14.295±3.097 | 16.461±2.141 | 0.126 | 13.712±3.484 | 16.933±2.736 | 0.059 | 0.510 | 0.640 | ||
MWF, myelin water fraction; WM, white matter; ALIC, the anterior limb of internal capsule; PLIC, the posterior limb of internal capsule; GCC, the genu of the corpus callosum; BCC, the body of the corpus callosum; SCC, the splenium of the corpus callosum; OT, optic tract.