Key legal question
Whether accident insurance benefits had to continue beyond 2005-07-31
Extracted holding
The rear-end collision caused only a temporary traumatic aggravation of a pre-existing degenerative spinal condition; the status quo sine was reached by 2005-07-31, so benefits could be stopped.
Extracted reasoning
The medical file consistently showed a severe pre-existing spinal deformity and degenerative changes; the accident did not materially worsen the underlying condition and no further causal accident effects remained after about six months.