His main interest in on causes and cognitive consequences of cerebrovascular disease in the young and elderly. There is a broad spectrum of cerebrovascular disease ranging from acute symptomatic intracerebral hemorrhages and cerebral infarcts to the more chronic white matter lesions and microbleeds, the latter usually going clinically unnoticed. Central in his research are clinical observations, that are being translated to an applied research question. The subsequent answers are taken back to the clinic. Cognitive and behavioral dysfunction and recovery after cerebrovascular disease are central in his research in which neuroepidemiology, neuroimaging and neuropsychology provide the methodological backbone of the often large cohorts studies that have been founded by the group.