Current concepts in the management of patients with so-called `minor' or `mild' head injury.

`Mild' head injury is increasingly recognized as a potential source of physical and psychological disability, but there is a lack of consistency about the definition and management of these patients. We discuss and define the terms `mild' and `minor', the assessment of post-traumatic amnesia, and the relevance of other signs and symptoms. Previous guidelines and recent evidence that a `mild' injury may be followed by an intracranial complication are reviewed as a basis for recommendations for investigation and management in accident and emergency departments, for in-patient observation and for discharge planning. [ABSTRACT FROM AUTHOR]