A person suffering from a concussion exhibits physical, mental and emotional symptoms that may indicate traumatic brain injury, according to WebMD. Symptoms include confusion, clumsiness, slurred speech, nausea and headaches. In addition, a concussed individual may have balance issues and sensitivity to light and noise.
Personality and behavior changes are also indicative of a brain injury caused by a concussion, and a person suffering from a concussion may have ringing in the ears, memory loss and trouble concentrating, explains WebMD. Concussions are often difficult to detect, because while the concussed individual may have a visible external injury, the actual concussion is internal. Symptoms may take days or weeks following the injury to manifest.