brett snyder, operator of cranky flier.com. thank you so much. >> welcome. >> aging is something we all have to think about at a certain point. but what if there's a way to know where you stand far ahead of time in terms of up here, the new app designed to detect developed right here in the bay area may be a game changer for detecting a form of dementia hitting people under 60. it's not on the market yet, but it holds a lot of promise. joining us live now to talk about the research ucsd clinical neuropsychologist and associate professor, doctor adam zaffaroni. doctor zaffaroni, thank you for joining us. >> hi, kristin. thanks so much for having me. >> i guess, to have this conversation, we should explain what is ftd or frontotemporal dementia and how is it different from alzheimer's? >> yeah. so frontotemporal dementia or ftd is the most common early onset form of dementia striking before the age of 60, it's a progressive brain disease similar to alzheimer's disease. but unlike alzheimer's disease, that primarily affects the me