What is traumatic brain injury?What are the main signs and symptoms of traumatic brain injury?How is traumatic brain injury diagnosed?What are some of the main medical treatments for traumatic brain injury?Have any supplements been studied for traumatic brain injury?How could diet affect traumatic brain injury?Are there any other treatments for traumatic brain injury?What causes traumatic brain injury?How do you return to normal activity after a mild traumatic brain injury?What can be seen using brain imaging after a traumatic brain injury?