comparison to the Lithuanian study (I think it was Lithuania anyway...) where we have a whole bunch of "low speed" crashes and no reported injuries. Could it be they're simply stronger than their American counterparts? Or could it be a function of litigation here as opposed to there...ooops, there IS NONE THERE!

Whoa...don't burn up the keyboard just yet, I would agree that that, too is largely an oversimplification of that data...but if you adopt the logic behind the "review of a (claims/hospital/group of doctors) database" (aka: epidemiological studies) then you have to adopt the underlying data of that study as well.

You ask: ...the torso and head are NOT accelerated at an increased value cf. the vehicle, consistently...? Yes, that is correct. We've seen varying head accelerations relative to car accelerations and no absolute and discernable pattern across a far larger "n" than originally proposed by Severy. No "head multiplcation factors."

You ask: Are you saying that "jerk", or the rate of change of acceleration (of the head, etc.), has nothing to do with the potential for injury? I wouldn't say "nothing," but for occupant head/neck kinematics during "low speed" impacts, the profile of the acceleration pulse (including the peak and the rate of onset, or jerk), is surely less important than the change in velocity (area under the acceleration curve).

See you in August.

Rusty Haight
rustyhaight@worldnet.att.net

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