Thanks for sharing this story with us. I found it touching and illuminating. As you know, more than 7 million Americans over the age of 65 suffer from dementia : 1 in 5 for women and 1 in 10 for men. You may be interested in a new study by the MIT Picower Instute for Learning under the directorship of Dr. Li-Huei Tsai, who has pioneered a possible cure by reversing the effects using light and sound to open memory pathways. Human trials have been approved. It provides a glimmer of hope. Best regards.