Thanks for all the responses.
I was looking for a detailed study discussing neck injuries, head injuries, body injuries. The likelihood of getting any particular one. Does helmet use actually decrease or increase particular injuries, such as neck? Are accident rates increased or unchanged due to sensory limitations?
Still ain't seen anything remotely like this.
I consider the report I was quoting from to be utter trash.
For example they quoted 99% law compliance before repeal. With 59 percent wearing FMVSS No. 218 compliant helmets and 40% wearing non compliant helmets.
What's a non compliant helmet anyway?
A baseball cap with a chin strap?
Was the net effect of repeal actually a 12% decrease in helmet usage instead of 52%?
Astronuc said:
I know a couple of people who survived such accidents because they wore helmets. In fact, one showed my the helmet which had a large gash in front. Had he not been wearing the helmet, his brains would have been splattered over the road.
Can't say I'm impressed by busted helmet stories.
Not after my friend broke hers by leaning against it.
This just generates more questions.
Does your 2yr old helmet still meet design spec?
5yr?
Is your 10 year old helmet any better than a baseball cap with a chin strap?
Astronuc said:
As for the statistics - one has to look at the deaths of unhelmeted and helmeted riders compared to the number of accidents in each category - not the fact the 45% of deaths were unhelmeted riders.
Given what appears to be a very strong selection effect for "bold" riders, I'm inclined to think that non helmeted riders have way more accidents as a group. I couldn't find the information you specify in the report.
Astronuc said:
Wearing a helmet does not preclude a broken neck (quadraplegia if one survives), nor broken ribs, nor abrupt sudden death when the heart stops due to blunt trauma, nor rupture internal organs, nor broken limbs, nor other damages.
If helmet usage increases quadriplegia from additional cases of neck injuries.
I personally would take the clean kill.
You might disagree but,
Life is a 100% fatal sexually transmitted disease.
Absolutely no exceptions.
It's only a question of when, not if.
Astronuc said:
Only safe riding can - and part of that is wearing a helmet and appropriate attire.
I'll agree to the avoiding accident part.
But is helmet wearing truly what's claimed for it?
All I've really seen is hearsay evidence.
While helmet use seems to be a good idea at first glance there are some technical questions that really make me wonder.
From:
http://motorcyclistonline.com/gearbox/motorcycle_helmet_review/
Your brain basically floats inside your skull, within a bath of cervical-spinal fluid and a protective cocoon called the dura. But when your skull stops suddenly—as it does when it hits something hard—the brain keeps going, as Sir Isaac Newton predicted. Then it has its own collision with the inside of the skull. If that collision is too severe, the brain can sustain any number of injuries, from shearing of the brain tissue to bleeding in the brain, or between the brain and the dura, or between the dura and the skull. And after your brain is injured, even more damage can occur. When the brain is bashed or injured internally, bleeding and inflammation make it swell. When your brain swells inside the skull, there's no place for that extra volume to go. So it presses harder against the inside of the skull and tries to squeeze through any opening, bulging out of your eye sockets and oozing down the base of the skull. As it squeezes, more damage is done to some very vital regions.
I worked this out years ago just from basic physiology and physics. It's nice to see someone else thinking about this now. Couldn't find anything then.
Obviously, a helmet is going to reduce peak acceleration of your skull bones and reduce breakage of them. Is it going to do squat for the secondary collision of your brain with the inside of you skull? Is the skull tuned so its structural integrity fails at the same point the internal shock adsorbing system gets fatally overloaded? (barring contact with sharp pointy objects) Do you actually want the skull to break so your brains don't run out you nose? Is breakage potentially a survival feature? I do know the Docs will pop the top of you skull off (assuming you get to them in time) and people have lived through this.
Also
I finally looked up actual helmet weights, about 7lbs or 6lbs if you spring for top of the line.
That works out to about a 60% increase in load on the neck. In any mechanical system you would be redesigning the support structure if you increased the base load that much. I would have to say that has got to have some negative effect. How bad is it?
Perhaps I'm being really cynical here but,
Did the DOT report I quoted from before not have word one about neck injuries because showing neck data would ruin their position of having your best interests in mind?