This is pertinent to all ages — kids and adults. It is key to wear a helmet, as well as ensuring that the helmet is on the head correctly. In my work at the Stanford Trauma Center, I see many sad cases of traumatic injuries from bike crashes. The head is not terribly forgiving nor easy to heal.
Just want to remind bike enthusiasts to please wear their helmets and make sure it fits well and is placed on their heads correctly. Most errors are (1) not buckling the helmet straps; (2) not protecting the front of the head/brain (helmet is pushed up so forehead and underlying frontal lobe of brain is vulnerable); or (3) helmet is too loose (doesn't fit or straps not tight) and will shift when you fall.
The helmet should be level and the front edge just above your eyebrows. If a helmet has been impacted by a prior "crash" it should be tossed out (cut the straps) and a new one should be purchased.
Janet A. Neff
Trauma Program Manager, Stanford University Medical Center
(published in Palo Alto Weekly 6/7/06)