AD	Alzheimer’s Disease
AUC	Area Under the Receiver Operating Characteristic Curve
CA	Classification Accuracy
CBD	Corticobasal Degeneration
CI	Confidence Interval
CV	Cross-Validation
DAT-SPECT	Dopamine Transporter Single-Photon Emission Computed Tomography
ET	Essential Tremor
kNN	k-Nearest Neighbors
MAE	Mean Absolute Error
MCC	Matthews Correlation Coefficient
MCI	Mild Cognitive Impairment
ML	Machine Learning
MMSE	Mini-Mental State Examination
MoCA	Montreal Cognitive Assessment
MSA	Multiple System Atrophy
MSE	Mean Squared Error
NINDS	National Institute of Neurological Disorders and Stroke
PDBP	Parkinson’s Disease Biomarkers Program
PD	Parkinson’s Disease
PPMI	Parkinson’s Progression Markers Initiative
PSP	Progressive Supranuclear Palsy
RBF	Radial Basis Function
RMSE	Root Mean Squared Error
SGD	Stochastic Gradient Descent
SHAP	SHapley Additive exPlanations
SVM	Support Vector Machine