Next to Alzheimer’s, FTD is the form of dementia
that strikes people most frequently at a relatively young age—younger than 65.
FTD, large numbers of brain cells begin to die off in the frontal lobe, the foremost part of the brain which comprises about 30 percent of brain mass. The frontal lobe helps regulate behavior, movement, and mood, and is responsible for functions such as language. The first signs of FTD are changes in behavior and personality.