[email hidden] (Russell) wrote:
....
| > >After being patched up, I inspected the helmet. To my absolute horror,
| > >it had obviously taken a severe blow to the r/h side where it was
| > >gouged and dented. A large chunk of the inner polysterene had broken
| > >away.
....
| The point I was trying to make is that although my body was pretty
| battered, my head must have taken quite a knock & I didn't even
| realise until I looked at my helmet a couple of hours later and I had
| a head & neck ache the next day.
Possibly due to the greater weight of your head+helmet.
| Now ok, it might not have resulted in a fractured skull (we'll never know)
Your other bones weren't broken. Skulls may be thinner than thigh
bones but their shape makes them just as strong. Anyone got better
data than that? In particular can we say whether skulls are stronger
than helmets (depending on the angle etc)?
| but that's my most precious organ
| in there and (this is the important bit) the neurons inside it can't
| ever be replaced, unlike my ankle, knee, hip & fingers.
You get brain damage from the brain slapping against the inside of the
skull, in various ways. It's all about decceleration rates. A helmet
can reduce the decceleration rate but not by denting and the
polystyrene breaking away. I can be quite confident from your
description of your helmet that it made no significant positive
contribution to reducing the decceleration rate of your head at the
moment of impact. This is not a matter of opinion, nor is it the
product of rocket-science-level theorizing.
| Now, here's another statistic. A couple of years back I did fall off
| my bike without a helmet, at hardly more than walking pace and I
| banged my head on the road. It really hurt and I had a dirty great
| scab & bruise but only quite minor cuts & scrapes elsewhere. Kind of
| the opposite to my most recent 'helmeted' accident.
I don't believe "dirty great scab & bruise" denotes a condition close
to fatal or involving brain damage.
| I leave the final word to the very first sentence in the British
| Cycling "Getting Started" guide for young riders:-
|
| "KIT:
| Helmets: are a must when cycling."
|
| http://www.britishcycling.org.uk/membership/2003/BC_GUIDE%20TO%20CYCLING%20FOR%20KIDS.doc
404. The site seems to be about cycling as sport; I wouldn't take
their advice about a2b cycling, thanks.
--
Patrick Herring, Sheffield, UK
http://www.anweald.co.uk