Stanford Senior Project

The Stroke Coach is an iPhone-based device that will assist patients at risk
from stroke in recognizing the symptoms of a true stroke and encourage and
enable them to seek treatment. The device will use several custom-designed
peripherals to measure things like physical strength, as well as cognitive
ability and tactile strength. These measurements will then be used to deduce
the likelihood that the patient is experiencing a stroke. 

From:
http://www.stanford.edu/class/cs194/faire/projects.html