The confusion and uncertainty over whiplash injury continues unabated in your columns and elsewhere. Numerous reasons have been suggested for the increasing incidence of this condition. As an honest quack involved for many years in the diagnosis and treatment (and also reporting) of whiplash injury may I make one simple point?

A head restraint helps to prevent neck injury but, paradoxically, can make matters worse if it is not correctly positioned in the car. The golden rule is that the head restraint should be level with the top of the head, and no more than one inch behind it. My own simple observations (and my reading of surveys) suggest that a lot of motorists may not be aware of this preventative advice.