His dementia was diagnosed after a car wreck causing head trauma. we’re not really sure if there were any dementia before the accident or it was caused by the head injury from the accident. He was 63 years old at the time of the accident and is 64 years old now. I find it really hard to get answers from the medical field about his head injury/dementia. I am so thankful to find this website and to hear other peoples story. I think it will answer a lot of questions for me. Thank you.