From Whiplash Injuries by Drs. Croft and Foreman
"Other researches have demonstrated that whiplash alone (in the absence of blunt head trauma) may result in surface hemorrhages on the brain, cerebral concussion, and subdural hematoma. Cerebral concussion, which sometimes can be demonstrated by electroencephalography, very often results in postconcussion headache syndrome. Russel found that even after 6 months, 60% of the group that he studied continued to have headaches. Denker and Perry reported similar findings, with 33% symptomatic at 1 year and 15-20% symptomatic at more than 3 years.
In one study, 31% were said to have headaches after 5 years.
Many of these cases resulted from direct head trauma and were not directly attributable to the phenomenon of whiplash. However, motor vehicle accidents are the leading cause of both fatal and nonfatal brain injuries in this country. The statistics are sobering.
In terms of mortality, the number of Americans who have died from brain injury in the last 2 decades alone
has exceeded the cumulative number of Americans killed in all wars since the founding of this country.
And the number of nonfatal brain injuries is conservatively estimated to be more than 2 million each year, with an estimated cost to society of about $25 billion yearly. It has been variously estimated that from 40% to 60% of all mild brain injuries are attributable to motor vehicle accidents. The most common diagnosis given is concussion.
Many of these brain injuries occur without direct head strike."
In the last seven years we have taken over 600 hours of postgraduate neurology classes and specialize in diagnosing and helping injured people.