PD	Parkinson’s disease
MDS	International Parkinson and Movement Disorder Society
PD-CogN	Normal cognition
PD-MCI	Mild cognitive impairment
PD-D	Dementia
EEG	Electroencephalogram
QEEG	Quantitative EEG
H&Y	Hoehn and Yahr Scale
UPDRS	Unified Parkinson Disease Rating Scale
LED	Levodopa Equivalent Dose
MMSE	Mini-Mental State Examination
MoCA	Montreal Cognitive Assessment
CDT	Clock drawing test
ACE III	Addenbrooke’s Cognitive Examination III
BVRT	Benton Visual Retention Test
BDI	Beck Depression Inventory
PSD	Power spectral density
SPR	Spectral Power Ratio