Practice Areas

Blog

Florida Car Accidents & Truck Collisions

Florida Pedestrian | Crosswalk Collisions & Bicycle Accidents

Florida Wrongful Death & Fatal Accidents

Florida Medical Malpractice | Medical Negligence

Wrong Site Surgery Mistakes Still Made With Safety Precautions | Florida Medical Mistake Lawyer
Life Saving Radiation Treatment Turned Lethal, Part 2 | Tampa Medical Negligence Lawyer
Life Saving Radiation Treatment Turned Lethal, Part 1 | Medical Malpractice Lawyer in Pinellas County
Examining Surgical Robots | More Harm than Good? | Florida Medical Negligence Lawyer
Prescription Drug Mistake Lawsuit Filed by Actor Dennis Quaid | Florida Medical Negligence Attorney

Florida Slip | Trip | Fall Accidents and Unsafe Premises

Florida Personal Injury Video Blog | Florida Personal Injury Lawyer James W. Dodson

view all

Other Blogs

Tampa Bay Injury Law Blog

Client
Testimonials

See What Our Clients
Are Saying About Us

"The Five Mistakes That Can Wreck Your Florida Accident Case is a must read for anyone that has been injured in a accident in Florida!"

My case was handled courteously and professionally. All of my questions were answered promptly and I never felt anything I was concerned about was un-important. Judi always had answers and took the time to explain. She was always on top of my case when I called the office.

I really appreciated the fact that Mr. Dodson hired a professional expert to measure and make an evaluation about the place where I fell. The whole process was handled very well. Both Judi and Mr. Dodson were very nice and my experience working with them was professional.

I would recommend Jim Dodson to anyone I knew who was in need of a personal injury attorney.

"I recommend the Law Office of James Dodson. They were always able and available when I had questions. They even got me more than I expected right when I needed it most. I am exceedingly grateful to have had this wonderful group of people helping and getting what we deserve."

Spine Injuries

Head, Neck, and Mandible Dynamics Generated by 'Whiplash'

A Reason Why Whiplash Has Increased: Seat Properties and Neck Responses

Whiplash-type neck distortion in restrained car drivers: frequency, causes and long-term results

A Reason Why Whiplash Has Increased: Seat Properties and Neck Responses

Abstract: Whiplash has increased over the past two decades. This study compares occupant dynamics with three different seat types (two yielding and one stiff) in rear crashes. Responses up to head restraint contact are used to describe possible reasons for the increase in whiplash as seat stiffness increased in the 1980s and 1990s.

Three exemplar seats were defined by seat stiffness (k) and frame rotation stiffness (j) under occupant load. The stiff seat had k=40 kN/m and j=1.8 degrees /kN representing a foreign benchmark. One yielding seat had k=20 kN/m and j=1.4 degrees /kN simulating a high-retention seat. The other had k=20 kN/m and j=3.4 degrees /kN simulating a typical yielding seat of the 1980s and 1990s. Constant vehicle acceleration for 100 ms gave delta-V of 6, 10, 16, 24, and 35 km/h. The one-dimensional model included a torso mass loading the seatback, head motion through a flexible neck, and head restraint drop and rearward displacement with seatback rotation.

Neck displacement was greatest with the stiff seat due to higher loads on the torso. It peaked at 10 km/h rear delta-V and was lower in higher-severity crashes. It averaged 32% more than neck displacements with the 1980s yielding seat. The high-retention seat had 67% lower neck displacements than the stiff seat because of yielding into the seatback, earlier head restraint contact and less seatback rotation, which involved 16 mm drop in head restraint height due to seatback rotation in the 16 km/h rear delta-V. This was significantly lower than 47 mm with the foreign benchmark and 73 mm with the 1980s yielding seat.

Early in the crash, neck responses are proportional to ky/mT, seat stiffness times vehicle displacement divided by torso mass, so neck responses increase with seat stiffness. The trend toward stiffer seats increased neck responses over the yielding seats of the 1980s and 1990s, which offers one explanation for the increase in whiplash over the past two decades. This is a result of not enough seat suspension compliance as stronger seat frames were introduced.

As seat stiffness has increased, so have neck displacements and the Neck Injury Criterion (NIC). High-retention seats reduce neck biomechanical responses by allowing the occupant to displace into the seatback at relatively low torso loads until head restraint contact and then transferring crash energy. High-retention seats resolve the historic debate between stiff (rigid) and yielding seats by providing both a strong frame (low j) for occupant retention and yielding suspension (low k) to reduce whiplash.

Published by PubMed
Viano, D.C. 2003

GET YOUR FREE COPY
The Five Mistakes that Can Wreck Your Florida Accident Case was written by Florida Personal Injury Lawyer Jim Dodson to help accident victims who have been injured in Florida. This must-read book addresses many aspects of the insurance claims process, what you need to know about hiring an attorney (if in fact you need to), as well as the myths associated with injury and accident claims. Learn "What is a Personal Injury or Accident Case?", "How You Determine the Value of a Personal Injury Case", and "Do you really need an attorney?" This free consumer guide also provides you with a list of "What Every Injury Claim Must Have." Arm yourself with this valuable information before you hire an attorney, speak with an insurance adjuster or sign any forms. Click here to get your free copy.

Free Consultation

Law Office of James W. Dodson, P. A.
1259 Myrtle Avenue South
Clearwater, FL 33756

Phone: (727) 446-0840
Fax: (727) 446-0850

Your information is confidential. Submitting your information does not create a lawyer/client relationship without a written contract setting forth terms of representation.