Alzheimer’s disease is the most commonly diagnosed form of dementia, but it’s not the only one. Silvia Fossati, PhD, Director and Professor of the Alzheimer’s Center at Temple, spoke with The New York Times about the other primary types of dementia, including vascular, Lewy Body and frontotemporal, and how they affect the brain. A person’s diagnosis depends on main symptoms and what neurologists can see in the brain.