Inclusion criteria for PD patients:  Diagnosis of idiopathic Parkinson's disease H&Y scale ≤ 3 while on medication Age ≤ 85 years Right-handedness with the Edinburgh Handedness Inventory Quotient Right-side involvement according to H&Y and Movement Disorder Society Unified Parkinson's Disease Rating Scale III (MDS-UPDRS III) Handwriting difficulty defined by a score greater than or equal to 1 on item II.7 of the MDS-UPDRS Oral and written informed consent to study participation  Inclusion criteria for healthy controls:  Sex-matched and age-matched with PD patients; Right-handed; Oral and written informed consent to study participation.  Exclusion criteria for PD patients:  Mini-Mental State Examination lower than 24; Visual impairments that interfere with the immersive virtual environment; (Other) upper limb deficits impeding handwriting; History of (other) systemic, neurologic, psychiatric diseases, head injury and cerebrovascular alterations visible at an MRI scan; Family history of neurodegenerative disorders; History of alcohol and/or psychotropic drug abuse; Contraindications for MRI; Denied oral and written informed consent to study participation.  Exclusion criteria for healthy controls:  Mini-Mental State Examination lower than 28; Visual impairments that interfere with the immersive virtual environment; History of systemic, neurologic, psychiatric diseases, head injury and cerebrovascular alterations visible at an MRI scan; History of alcohol and/or psychotropic drug abuse; Contraindications for MRI; Denied oral and written informed consent to study participation