The Impact of Dual-Tasking on Postural Stability in People With Parkinson’s Disease With and Without Freezing of Gait

Background. Postural instability and freezing of gait (FOG) are major problems in patients with Parkinson’s disease (PD), and both contribute to falls. However, the interrelationship between these 2 deficits is still unclear. Objective. This study investigated whether dual-tasking influenced postural control differently in freezers (FOG+) and nonfreezers (FOG−). Methods. Thirty-three patients with PD (19 FOG+, 14 FOG−, well-matched) and 28...