Post-Concussion Syndrome (PCS) is a complex disorder in which various symptoms of a concussion injury used you not achieve recovery within the weeks and months after the injury.
Mayo Clinic states flatly that the severity of the concussion injury does not appear to be associated with the risk of the development of postconcussion syndrome.
Some experts believe Post Concussion Syndrome is caused by structural damage to the brain or disruption of the messaging system within the nerves of the brain which is caused by the impact that cause the concussion. Others believe postconcussion symptoms are also partially related to unique individual factors which are triggered by the concussion injury. Those factors have been noted to include individual genetics, unique “brain reserve”, co-existing Post Traumatic Stress Disorder (PTSD), co-existing depression and anxiety, and many other factors.
Many concussion victims make a quick recovery from the immediate symptoms. Many don’t. Studies have shown that as many as 86% of concussion victims do not recover. Some highly respected authorities assert that there is no such thing as complete recovery from a concussion.