A father and daughter know the heartbreak of what Bruce Willis is experiencing now that he has been diagnosed with frontotemporal dementia. Sandra Leech started a video diary after her father, Richard Pontious, a former trucker driver, received the same devastating diagnosis. To keep his mind sharp, she gets him to sing along to his favorite songs. Neurologist Clifford Segil says frontotemporal dementia is an uncommon type of dementia.