Often, the effects of minor to moderate braininjuries are not immediately apparent. Many months may go by before brain injury changes become apparent. Even then, special training and expertise are required to
properly diagnose such impairments. Such fields of specialization are known as Neuropsychology and Neuropsychiatry.  Recognizing such problems is made even more difficult by perceptual and expressive impairments caused by brain injury. Brain injury causes diminished self-awareness that interferes with the ability to recognize changes in the self. It also causes mental confusion and a sense of uncertainty about experiences. Difficulties finding familiar words to communicate thoughts and desires hinders communication and fuels frustration. Many individuals do not report such symptoms out of fear of being thought of as mentally unsound. Others are shamed by such symptoms in themselves. Additionally, the very nature of brain injury interferes with the ability to recognize the problem. Frequently, brain injury causes memory impairments and expressive disorders. In real terms, this means that even when the memory survives the words might become elusive. Such impairments can hamper the ability to provide the doctor an accurate symptom picture. Even minor head injury, also known as concussion, can cause substantial difficulties or impairments that can last a lifetime. Whiplash too, can result in the same difficulties as head injury. Such impairments can be helped by rehabilitation, however many individuals are released from treatment without referrals to brain injury rehabilitation, or guidance of any sort. 

Coma

Head Injury Index

Minor Head Injury

Traumatic Head Injury

Coma - Head Injury Index - Minor Head Injury - Traumatic Head Injury