mTBI often cause cognitive disorders, ADHD or ADD. Many suffers from chronic tiredness and dizziness (vertigo). Vision disturbances are common. Depression is common.  Epilepsy /absences may come with a different kind of depression, typically associated with high glutamate in the brain.  

On a long term basis scientist associates mild traumatic brain injury with Alzheimer’s, multiple sclerosis, ALS, Parkinson’s and other neurodegenerative illness. Leading scientists hypnotizing a link to brain stem vascularization, that could just as well come from an injury in the cervical (upper) spine –or from a contraction of blood vessels as a natural response to spinal injury.