Neurophysiological Aspects of postural control training in Parkinson's disease

Introduction: Postural instability is an obvious symptom in Parkinson's disease (PD) and documented in various studies. However, some experiments report no differences between PD patients and age matched controls. This divergence might be explainable by methodical differences in postural control analyses e.g. perturbed or unperturbed, on or off medication. Further more the basic pathological mechanisms as well as treatment strategies are widely discussed. Some authors consider disturbances in peripheral mechanisms to be fundamentally involved in postural instability others refer to a reduced cortical excitabilit…