Concussion

Definition:

A significant blow to the head that may result in unconsciousness (See also concussion - first aid).

Causes, incidence, and risk factors:

A concussion may result from a fall in which the head strikes against an object or a moving object strikes the head. A suddenly induced turning movement such as a blow that twists the head, is more likely to produce unconsciousness. However, significant jarring in any direction can produce unconsciousness.

The length of unconsciousness may relate to the severity of the concussion. Often children (and adults) have no memory of events proceeding the injury or immediately after regaining consciousness.

Bleeding into the brain can occur with any blow to the head, whether or not unconsciousness occurs. If your child has received a blow to the head, observe closely for signs indicating possible brain damage. Things to watch for include repetitive vomiting, unequal pupils, confused mental state or varying levels of consciousness, seizure-like activity, or the inability to wake up (coma). If any of these signs are present, contact your health care provider promptly.

Update Date: 02/09/00
Updated by: J. Gordon Lambert, MD, Associate Medical Director, Utah Health Informatics and adam.com editorial