“Mild” traumatic brain injuries can cause significant emotional, physical, and cognitive impairments. Associated outcomes can include depression, post-concussion symptoms, disability, underemployment, low income, and marital instability. Yet, mild traumatic brain injuries often go undetected because of the inability of conventional imaging tests to identify them.
http://oatleyvigmond.com/mild-traumatic-brain-injury/#.VMqWjy5YwdV