What are the most common symptoms of traumatic brain injury (TBI)?

Symptoms of TBI are often complex and highly varied depending on the nature of the trauma, the severity of the accident that caused the trauma and how quickly the victim received treatment. In general, some of the more common symptoms that may be experienced include:

Loss of memory
Forgetfulness
Poor concentration
Difficulty thinking
Sudden mood swings
Hearing loss
Vision problems
Tinnitus
Headaches
Loss of motor functions
Seizures
Dizziness
Difficulty sleeping
Nausea and/or vomiting
Noise or light sensitivity