I’m not familiar with any research regarding brain impairment among people who live with their parents. To know with certainty, you would have to consult a neurologist or a brain science researcher. There is research regarding brain impairment/damage among people who have been abused as children, but I don’t think that is what you are asking.
At 18 years old, you are an adult. You should have more freedom than you do. If you feel as though you’re ready to move out, then you should. If you’re not ready, then stay until you are ready, but in the meantime you should be attempting to become more independent. Independence is important for your psychological and emotional development. You should be developing your own identity apart from your parents.
I’m also wondering about college. Are you planning to attend? That might be your opportunity to gain some independence from your parents.
Ideally, therapy would benefit you greatly. Family therapy could also be useful, if your family would be willing to participate. Please take care.
Dr. Kristina Randle