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Immediate Seizures: Seizures that occur within 24 hours of a traumatic brain injury.

Information Processing: The primary purpose of the brain. Among its duties, the brain handles information, examines incoming information from the senses, pays attention to what is important, makes decisions and initiates response. This cycle applies to information from the environment and the body. Any break in the cycle can have profound consequences.

Input: The first stage of information processing. Information travels through the senses to the brain from the environment and internal organs of the body.

Intracerebral Hematoma: Bleeding within the brain caused by damage to a major blood vessel.

Intracranial Pressure: Buildup of pressure in the brain as a result of injury.

Intracranial Pressure: The exertion of force within the brain by intracellular fluids capable of causing distortion or displacement of cerebral structures or a reduction of cerebral blood flow. Because the skull is a rigid container of brain tissue, blood and cerebrospinal fluid, an increased volume of one component without an equal decrease of another will result in ICP.

Ischemic Stroke: Stroke caused by the formation of a clot that blocks blood flow through an artery to the brain.