Concussions are classified as a mild traumatic brain injury. The conflicting thing is, is that a concussion is not able to be seen on X-RAY, CT or MRI**. Because of this, many people think they are fine and that it will come right. This is where education around concussion comes in.
Yes, many concussions can resolve on their own, but there are many cases where they don't. Although it is classified as "mild", it is very traumatic if you experience dizziness, headaches, nausea, sleep disturbance, fatigue, blurry vision, irritability, anxiety or depression as a result of your injury.
Imaging is only able to tell us of any physical changes within the brain (i.e. any lesions, bleeding or other changes going on).
What it doesn't show is the diffuse axonal changes in the brain, which means the excessive stress that the axons (brain cells) are experiencing as a result of concussion. The axons are vulnerable after a concussion and there is widespread metabolic changes in the brain leading to disequilibrium; there is too much demand and not enough energy available.
The goal of concussion rehabilitation is to re-establish equilibrium within the brain, reduce symptoms and return to your everyday function/tasks. THIS IS POSSIBLE with the right support for your individual needs.
**There is emerging evidence that functional MRI, which uses radio-waves and magnets to look at blood flow through soft tissues, may detect post-concussion syndrome. They can see if there is a lack of blood flow to areas of the brain while a client performs a task.