Yes. Our brain is the most delicate of our organs. It has limited ability to heal from an injury. One of the most common ways to injure your brain is during a car accident. If you have concerns, you should be evaluated by your doctor right away.
Yes. You can injure your brain from a significant impact with a car, even with a good driver. Post traumatic brain injury can have many varied outcomes depending on many factors, too numerous to mention here.