Abstract
The confluence of an aging population and increasing life expectancy of people with neurodegenerative diseases such as Parkinson disease and multiple sclerosis means that there is a growing segment of the population who are aging with a neurodegenerative disease. As such, rehabilitation professionals must be prepared for the combined challenges of age- and disease-related changes in physical function. First, a review of age- and disease-related problems experienced by older adults with Parkinson disease or multiple sclerosis will be presented, followed by a description of clinical practices that might be implemented by rehabilitation professionals to best address the problems experienced by these unique populations.