Activity level and balance in subjects with mild Alzheimer's disease.

To clarify if Alzheimer's disease has an impact on activity level and postural control, we examined 17 elderly diagnosed with mild Alzheimer's disease (MMSE scores 21-29) and 18 age- and gender-matched healthy controls (MMSE scores 27-30) using the Frenchay Activities Index, Bergs Balance Scale, Timed Up & Go and Walking in a Figure of Eight. Mild AD subjects were less active and had lower scores on Bergs Balance Scale, performed Timed Up & Go in longer time and took more steps outside the Figure of Eight, as compared to healthy elderly. This study shows that motor performance is affected already at mild stages of Alzheimer's disease and also that functional performance other than gait may also be impaired.