Mayo Clinic has a very useful resource explaining strokes, as well as their signs and symptoms. Their video and web page go through the causes of strokes, the FAST (face, arms, speech, and time) method to to identify when someone may be having one, and what to do in such an event.
https://www.mayoclinic.org/diseases-conditions/stroke/symptoms-causes/syc-20350113
TISO Resource Blog
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