Proprioception of the Ankle is Impaired in People with Parkinson's Disease.

Background: Proprioception has not been examined in the lower limb in people with Parkinson's disease (PD). Impaired proprioception may contribute to activity limitations, including falls in individuals with PD.

Objectives: The aims of this study were to determine whether: (1) people with PD have impaired proprioception in the ankles during active movements; (2) there are correlations between ankle proprioception and history of falls, fear of falling, and parkinsonian symptoms.