When it comes to the elderly one of the most popular keyword searches on Google and Bing have to do with the issue of balance and walking.
The following keyword search
Unable to maintain balance when walking
leads to this article in the Alzheimer's Reading Room
Balance and walking problems often present before the diagnosis of mild cognitive impairment, Alzheimer's or dementia.
To learn more about Alzheimer's and Dementia visit the Alzheimer's Reading Room Knowlege Base