article_snippet.sent: Silent strokes, which arise from blockages in blood vessels supplying the brain, do not have any outward symptoms and the victim is usually unaware of Silent strokes, which arise from blockages in blood vessels supplying the brain.
article_snippet.sent: Sudha Seshadri, a professor of neurology at Boston University School of Medicine, said: ‘This is concerning, since we know that silent strokes increase the risk of overt strokes and of developing dementia, walking problems and depression.
article_snippet.sent: The study, by Beth Israel Deaconess Medical Center and Boston University School of MedicineMedicine, involved more than 900 people aged 60 and over who did not have dementia or a history of strokes.
article_snippet.sent: The research was published in a report in the journal Stroke.
highlights_snippet.sent: American researchers examined more than 900 people aged 60 and over .
  
highlights_snippet.sent: The risk of having a silent stroke can be raised by more than 40 per cent .