Aged 1 Basal Ganglia 1 Case-Control Studies 1 Feedback, Sensory 1 Female Humans 1 Male 1 Middle Aged Parkinson Disease 1 Parkinson disease 1 Pitch Discrimination 1 Speech 1 Speech Acoustics 1 Speech Discrimination Tests 1 aged 1 basal ganglion 1 case control study 1 female 1 human 1 male 1 middle aged 1 pathophysiology 1 physiology 1 pitch discrimination 1 sensory feedback 1 speech 1 speech discrimination test 1