In 140: Alzheimer's patient on Twitter

For those who think Twitter is a vast wasteland of drivel, one woman's tweets may change your mind and warm your heart. Her honesty and clarity will move you. Following her tweets is like reading a live memoir.

Mary Agnes Kelley, age 82, who has Alzheimer's, tweets her thoughts with the aid of her daughter, Theresa Mackin. In 140 characters, you hear the voice of a vibrant woman and the Alzheimer's and dementia that have imprisoned her.