Houston Texans Coach Gary Kubiak collapsed on the sidelines of his team's game on Sunday after experiencing an apparent transient ischemic attack. So-called TIAs can serve as a warning sign of something more severe. They're often called "mini-strokes," but experts say they must still be taken seriously.
In this video, Kathy Morrison, Stroke Program manager at Penn State Hershey Neuroscience Institute, explains the basics about TIAs -- and why it is important to call 911 if you think you have experienced one.