1. Pathophysiology and epidemiology Mahmoud Reza Azarpazhooh and Vladimir Hachinski; 2. Diagnosis of potentially preventable dementias José G. Merino and Clinton B. Wright; 3. The brain at risk stage Mahmoud Reza Azarpazhooh and Vladimir Hachinski; 4. The patient with cognitive impairment Krister Håkansson, Miia Kivipelto and Tiia Ngandu; 5. Cognitive decline in transient ischemic attacks or minor strokes Antonia Nucera, Mahmoud Reza Azarpazhooh and Vladimir Hachinski; 6. The stroke patient and cognition Michael Brainin and Yvonne Teuschi; 7. Reversible dementias Lawrence S. Honig; 8. Prevention of dementia J. David Spence.