Can a person's mental capacity be affected after being brought back to life after being in a bad car accident?

It is very common for people who have head injuries to show changes in mental capacity or in personality. Any sort of damage to the head might harm the brain, and that could kill parts which help you to think or help you to respond. Sometimes there is paralysis, which is when the nerves can no longer make the body move. Sometimes memories may be destroyed. In most cases, people who have had brain injuries will get better over time as the brain heals and makes new nerve connections to do what it used to do before the accident; however, sometimes there is too much damage and the person will always have the problems caused by the injury.