The applicant, an 81-year-old man, was run over by his own vehicle, sustaining orthopaedic injuries.
He subsequently developed significant cognitive impairments.
The insurer denied catastrophic impairment benefits, arguing the cognitive decline was caused by a pre-existing subdural haematoma rather than the accident.
The arbitrator preferred the applicant's medical evidence, finding that the accident likely caused a minor head trauma that, combined with the pre-existing haematoma, resulted in brain edema and catastrophic impairment.
The applicant was awarded ongoing attendant care and housekeeping benefits.