First things first, let me give you guys a background on what's going on.
I'm a CS grad student working on a project for real-time systems. Embedded systems and whatnot, hard and soft deadlines, etc. Probably not too interesting to you guys, but still. My group is working on a helmet that has an accelerometer and a wireless transmitter within. When a person gets hit (such as a football player on the line of scrimmage), it crunches the data from the accelerometer to determine if there was possible concussive injury. We'd heard of some studies that indicated that minor trauma over a period of time can be just as threatening as a single major trauma, so we also intend to keep a history of impacts with the helmet. There will be a data API that will allow the coach, fieldside medic, and whoever else needs it to be able to access the data.
Now, the thing that we're actually having issues with is how to determine whether a "hit" is actually dangerous or not. My group member talked to a friend of his who is in this field, but all he could get out of him is "impacts to the head are bad". We need to know the severity of impacts to worry about, what kind of acceleration to be concerned over (simple linear shock, rotational shock, etc.), and really whatever else we can get from this. Any thoughts?
**tl;dr Need to know basic information about traumatic brain injury **