Virtual functional mobility test: A potential novel tool for assessing mobility of individuals with Parkinson’s disease in a multitask condition

Parkinson’s disease (PD) is characterized by four typical motor symptoms (MS) – tremor, rigidity, bradykinesia, and postural instability. As a consequence of the disease, gait disorders are a major challenge with a characteristic pattern such as trunk flexion, reduced arm swing, narrowed base of support and reduced range of motion and gait velocity [1]. Non-motor symptoms (NMS) are also present in PD. Dysfunctions in cognitive domains such as memory, language, attention, visuospatial capacity, and executive functions (EF) are some examples of NMS [2,3].