A person in a coma is unconscious and has little or no brain activity. Physical or auditory stimulus cannot be used to awaken a coma sufferer. They're alive, but they can't be awakened up and exhibit no symptoms of consciousness. The individual's eyes will be closed, and they will appear to be unresponsive to their surroundings. To awaken a patient in a coma, doctors usually use a series of tests to determine how much of the brain has been damaged by the accident. If more than half of the patient's brain has been affected, then medical professionals will avoid trying to revive them. Instead, they will focus on maintaining the patient's body temperature, breathing, and blood pressure during emergency surgery. If less than half of the brain is injured, then efforts are made to bring the patient out of the coma. The way that people in comas are brought out of it is through a process called "corticosteroid therapy." This involves giving the patient doses of steroids, which are natural chemicals found in bone broth. These drugs help repair the damage done to the brain by reducing inflammation and promoting cell growth. They also reduce the risk of infection. Corticosteroids are often given intravenously (through a vein) for the best results. It may take several days before they see any effects from the treatment so there is always a chance that they could rebound into a deeper coma if overdosed on them.