The most affected system is the nervous system. It is the nervous system because when you receive a concussion your brain is pushed up against your skull. The brain transports messages to other parts of your body and since your brain is injured you are most likely to have trouble reacting to things and may not feel as much pain as you usually would. Two important parts of the endocrine system, the pituitary gland and the hypothalamus, are located in or near the brain. Traumatic brain injures (concussions) can injure them, causing hormone problems. A person with TBI may have hormone problems right away or months or even years after the injury. The digestive system also will be affected because when you have a concussion you usually do not want
