Postural control in Parkinson’s disease
At the beginning of the nineteenth century James Parkinson, an English neurologist, was the first to describe the disease that bears his name. Since he made first references to falls in his famous essay – Parkinson (1817) ‘An essay on the shaking palsy’ – it is well known that postural instability is a hallmark of Parkinson’s disease (PD). The loss of postural control leads to impairment of gait and a higher risk of falling. Therefore, postural instability is a major clinical problem.