One thing I noticed a long time ago was that my mother's sense of smell was gone. I am always looking for ways to take better care of myself and of course to detect any symptoms of Alzheimer's in myself and other members of my family. By now you might guess that I will be paying close attention to my ability to detect odors.
Dr. Robert S. Wilson told Reuters Health that difficulty identifying odors seems to be related the buildup of 'tangles' in the brain that appear early in the development of Alzheimer’s disease. “We found the correlation of difficulty identifying familiar odors with Alzheimer’s disease pathology even in people without dementia,” he added.
Go read the entire article at The Alzheimer's Reading Room Weblog: Trouble identifying odors points to Alzheimer’s