Traumatic Brain Injury
Traumatic brain injury (TBI) is a sudden damage to the brain caused by external force, ranging from mild concussions to severe, life-altering trauma.
What is Traumatic Brain Injury (TBI)?
A traumatic brain injury is a sudden injury that damages the brain. It is categorized by how the injury occurs:
- Closed head injury: Occurs due to a blow, bump, or jolt to the head.
- Penetrating injury: Occurs when an object penetrates the skull.
Symptoms vary from mild to severe. While most people recover from concussions (a type of mild TBI), more severe injuries can lead to serious physical and psychological symptoms, coma, or death.
Causes and Risk Factors
The causes of TBI are often linked to the type of injury:
Common Causes of Closed Head Injuries
- Falls (most common in adults 65 and older)
- Motor vehicle crashes (most common in young adults)
- Sports injuries
- Being struck by an object
- Child abuse (most common in children under age 4)
- Blast injuries from explosions
Common Causes of Penetrating Injuries
- Bullet or shrapnel wounds
- Impact from weapons like hammers, knives, or baseball bats
- Bone fragments penetrating the skull
Certain groups are at higher risk: men are more likely to experience TBI and more serious outcomes, while adults aged 65 and older are at the greatest risk for hospitalization and death.
Symptoms
Mild TBI
- Brief loss of consciousness (though many remain conscious)
- Headache, confusion, or lightheadedness
- Dizziness, blurred vision, or tired eyes
- Ringing in the ears or bad taste in the mouth
- Fatigue, lethargy, or changes in sleep patterns
- Behavioral or mood changes
- Trouble with memory, concentration, or attention
Moderate to Severe TBI
- Worsening or persistent headache
- Repeated vomiting or nausea
- Convulsions or seizures
- Inability to wake from sleep
- Pupil dilation (larger than normal pupil) in one or both eyes
- Slurred speech, weakness, or numbness in limbs
- Loss of coordination, increased confusion, or agitation
Diagnosis
Medical care should be sought immediately following a head injury. Providers may use:
- Neurologic exams
- Imaging tests (CT scan or MRI)
- The Glasgow coma scale to measure eye, speech, and motor responses
- Neuropsychological tests to assess brain function
Treatment and Management
Mild TBI
The primary treatment is rest. Over-the-counter pain relievers may be used for headaches. Patients should follow provider instructions for a gradual return to normal activities.
Moderate to Severe TBI
Initial treatment focuses on stabilization, managing blood pressure, and ensuring adequate oxygen and blood flow to the brain. Subsequent treatments include:
- Surgery: To remove hematomas, repair fractures, or relieve intracranial pressure.
- Medicines: Including anti-anxiety medications, anticoagulants, anticonvulsants, antidepressants, muscle relaxants, and stimulants.
- Rehabilitation: Physical, occupational, and speech therapies, as well as psychological, vocational, and cognitive counseling.
Prevention
- Use seatbelts and child car seats.
- Avoid driving under the influence of drugs or alcohol.
- Wear helmets for sports and cycling.
- Prevent falls by installing railings, grab bars, and removing tripping hazards.
- Improve balance and strength through regular physical activity.