Article 8 Unified Parkinson Disease Rating Scale controlled study 8 human 8 Parkinson disease 7 female 7 male 7 aged 6 clinical article 6 Humans 5 adult 5 middle aged 5 nuclear magnetic resonance imaging 5 Female 4 Male 4 Middle Aged 4 Parkinson Disease 4 brain depth stimulation 4 disease duration 4 Aged 3 Magnetic Resonance Imaging 3 Mini Mental State Examination 3 cognition 3 diagnostic imaging 3 diffusion tensor imaging 3 diffusion weighted imaging 3 disease severity 3 electroencephalography 3 fractional anisotropy 3 neuroimaging 3