| Axial diffusivity | AD |
| Appendicular skeletal muscle mass | ASM |
| Appendicular skeletal muscle mass index | ASMI |
| Body mass index | BMI |
| Corpus callosum | CC |
| Diffusion tensor imaging | DTI |
| Fractional anisotropy | FA |
| Levodopa Equivalent Daily Dose | LEDD |
| Mean diffusivity | MD |
| Normal control | NC |
| Parkinson’s disease | PD |
| PD patients with sarcopenia | PDSa |
| PD patients without sarcopenia | PDNSa |
| Radial diffusivity | RD |
| Regions of interest | ROI |
| Superior longitudinal fasciculus | SLF |
| Unified Parkinson’s Disease Rating Scale | UPDRS |
| White matter | WM |
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