traumatic brain injury

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traumatic brain injury

n. Abbr. TBI
Injury to the brain caused by an external force such as a violent blow to the head, resulting in loss of consciousness, memory loss, dizziness, and confusion, and in some cases leading to long-term health effects, including motor and sensory problems, cognitive and behavioral dysfunction, and dementia.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

trau·mat·ic brain in·ju·ry

(TBI) (traw-mat'ik brān in'jŭr-ē)
An insult to the brain as the result of physical trauma or external force, not degenerative or congenital, that may cause a diminished or altered state of consciousness and may impair cognitive, behavioral, physical, or emotional functioning.
Synonym(s): acquired brain injury.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

traumatic brain injury

Abbreviation: TBI
Any injury involving direct trauma to the head, accompanied by alterations in mental status or consciousness. TBI is one of the most common causes of neurological dysfunction in the U.S. Each year about 50,000 people die from brain trauma, and an additional 70,000 to 90,000 sustain persistent neurological impairment because of it. About 5.3 million Americans live with TBI disabilities. The most common causes of TBI are motor vehicle or bicycle collisions; falls; gunshot wounds; assaults and abuse; and sports-related injuries. Twice as many males as females suffer TBIs, with the incidence highest between ages 15 and 24. People over 75 are also frequently affected (because of falls).

Patient care

Many traumatic injuries to the head and brain are preventable if simple precautions are followed: motorists should never drive while intoxicated; cyclists and bicyclists should always wear helmets; frail, elderly people should wear supportive footwear and use sturdy devices to assist them while walking.

Symptoms of TBI may include problems with concentration, depressed mood, dizziness, headaches, impulsivity, irritability, post-traumatic stress, or, in severe injuries, focal motor, sensory or verbal deficits. Late effects of severe or repeated injuries can include dementia, Parkinsonism, or amyotrophic lateral sclerosis (Lou Gehrig's disease).


If an injury to the brain has occurred or is suspected, the victim should not be moved until spinal precautions are carefully implemented. Serial neurologic assessments are carried out to identify the severity of injury and any subsequent deterioration, using the Glasgow Coma Scale.

TBIs can produce intracranial hemorrhage (epidural hematoma [EDH]), subdural hematoma (SDH), intracerebral hemorrhage (ICH), and traumatic subarachnoid hemorrhage (SAH); cerebral contusions; concussion (with postconcussive syndrome); and diffuse axonal injury (DAI). Treatments vary depending upon the type of injury that occurred. Synonym: cerebral concussion

See: table
See also: injury
Medical Dictionary, © 2009 Farlex and Partners

trau·mat·ic brain in·ju·ry

(TBI) (traw-mat'ik brān in'jŭr-ē)
An insult to the brain as the result of physical trauma or external force, not degenerative or congenital, which may cause a diminished or altered state of consciousness and may impair cognitive, behavioral, physical, or emotional functioning.
Medical Dictionary for the Dental Professions © Farlex 2012
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Bancroft is launching a continuing education program to share its expertise in rehabilitation for people with acquired brain injuries. Designed for case managers, social workers, rehabilitation therapists and other brain injury professionals, sessions are being be presented by clinical experts from Bancroft, a leading service provider for people with neurological disabilities.
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