| MSA | Multiple system atrophy. |
| αSyn | α-Synuclein. |
| MSA-P | Multiple system atrophy Parkinsonian variant. |
| MSA-C | Multiple system atrophy cerebellar variant. |
| PD | Parkinson disease. |
| RBD | REM sleep behavioral disorders. |
| OCD | Obsessive compulsive disorders. |
| FC | Functional connectivity. |
| WM | White matter. |
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