Comments about an informative You-Tube video about concussion: Concussions 101, a Primer for Kids and Parents

Jennifer Stokley commented on Facebook:

Save Our Kids! Please share with friends, family, everyone! Could be the difference between being Great, and becoming a Brain Injury Survivor!

Concussions 101, a Primer for Kids and Parents

www.youtube.com

Follow Dr. Mike for new videos! Uploaded on Dec 16, 2011http://twitter.com/docmikeevans
I've put together a few great handpicked resources on concussions at http://www.myfavouritemedicine.com/20... Check it out.
The symptoms of a concussion can be tough for kids to recognize..
Dr. Mike Evans is founder of the Health Design Lab at the Li Ka Shing Knowledge Institute, an Associate Professor of Family Medicine and Public Health at the University of Toronto, and a staff physician at St. Michael's Hospital.
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Conceived, written, and presented by Dr. Mike Evans
Illustrated by Liisa Sorsa
Produced, directed, and filmed by Nick De Pencier
Picture and sound edit by David Schmidt
Gaffer, Martin Wojtunik
Whiteboard construction by James Vanderkleyn
Production assistant, Chris Niesing
©2011 Michael Evans and Mercury Films Inc.
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• David Lloyd I think this may be the best, most comprehensive short video about concussion that I have yet seen. I still wish a couple of points had been made that were not made.
  
  
  1) Rotational injury, caused when a person is moving in one direction collides with an object moving in a different direction does more than just hit several parts of the brain, because different parts of the brain have different densities. You can spin a hard-boiled egg on a table, and it spins easily, because the relative density of every part of the inside of the egg is about the same. A raw egg, however, resists spinning, because different parts of the egg have different densities. Spin a raw egg, and it will never hatch. Drop it, and as long as the shell doesn't crack, it still has a chance of hatching if it is incubated. Various unintrusive methods of looking inside the two eggs may give the impression than both eggs are fine, but on scale too small to see with modern scanning technology, the egg that was spun has torn structures distributed throughout the egg, and is far more seriously damaged than an egg that was hit from one simple vector.
  
  2) For this reason, that rotational injury is so much more serious than a simple "bump" from one direction, the circumstances of an accident, with vector analysis of the two or more objects that collided can be a strong predictor of how serious an apparently "mild" injury may be.
  
  3) To my knowledge, NO ONE is designing and testing sports or bicycle helmets with dual-vector analysis. (Such as dropping a test subject onto a fast conveyor belt.) Consequently, current safety ratings of helmets are rather useless in terms of predicting a helmets ability to protect from rotational injury. It would be relatively simple to design a helmet insert that would provide rotation protection. Just create a tight-fitting inner helmet that attaches to the outer helmet with hard rubber studs that resist motion, but can stretch to twice their length before breaking. That slight change in helmet design would significantly reduce the number of serious sports injuries at negligible additional cost.