Monday, Sep 07, 2009 at 12:25
Snowy,
This is a legitimate concern. The closest analogy I know of is that of "Shaken Baby Syndrome". Type that into Google and you'll come up with a heap of hits that explain why nobody should ever shake a baby. I quote one of those references:
..............................................................................................................
In shaken baby syndrome, the sudden and repeated vigorous shaking pitches the infant or child’s brain in different directions and causes parts of the brain to pull away, tearing brain cells and blood vessels. The force of shaking a child in anger and frustration is five to 10 times greater than if the child were to simply trip and fall (Jenny, et al., 1999). That force is repeated in succession as the child is being shaken.
Violent shaking is especially dangerous to infants and
young children because their neck muscles are not fully developed and their brain tissue is exceptionally fragile. Their small size further adds to their risk of injury.
Often, the outward signs of injury to an infant or
young child are not obvious, as the injuries occur on the inside, particularly in the head or behind the eyes. These injuries can include:
Brain swelling and damage
Subdural hemorrhage
Mental retardation or developmental delays
Blindness, hearing loss, paralysis, and speech and learning difficulties
Death
Shaken baby syndrome can have disastrous consequences for the family, the child and society. If the child survives, medical bills can be enormous. These children may require lifelong medical care for brain damage injuries such as mental retardation and cerebral palsy. The child may even require institutionalization or other types of long-term care.
...........................................................................................................
I expect that the forces delivered in the back of a 4wd would be less than what's required to cause this type of injury, but nobody can give you a definitive answer on this. Why take a risk on a 6 month old baby when the stakes are high?
Cheers
Phil
AnswerID:
382252