7 Key Facts About Traumatic Brain Injuries

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A traumatic brain injury (TBI) remains one of the leading causes of disability and death among adults in the U.S. These injuries also affect children, making it essential to recognize the warning signs early so you can protect your loved ones.

1. The Causes of a TBI Can Vary

A TBI can result from a bump, jolt, blow to the head, or penetrating injury that interferes with normal brain function. Not every impact causes a TBI, but when one occurs, the effects can range from mild to severe.

Anyone can experience a TBI. Common causes include car accidents, sports, workplace incidents, or simple slips and falls.

According to extensive research compiled by the Centers for Disease Control and Prevention (CDC), falls account for around half of all hospitalizations related to traumatic brain injuries. Assaults, motor vehicle crashes, and firearm-related suicides are also frequent causes.

For military personnel, explosive blasts and combat injuries often lead to TBIs.

TBIs are generally classified as open or closed. In an open TBI, the skull is penetrated or fractured; in a closed TBI, the skull remains intact.

Additional classifications include concussions—mild but potentially serious direct-impact injuries—and contusions, which involve bleeding in the brain caused by a direct blow. A diffuse axonal injury occurs when brain structures tear due to shearing forces inside the skull.

2. Signs and Symptoms May Not Emerge for Weeks

One of the challenges with TBIs is that symptoms can appear immediately or be delayed for days or even weeks.

Some people may notice something feels wrong without connecting it to their injury, while others experience no immediate symptoms only for the condition to worsen later.

Mild TBI symptoms often include dizziness, headache, confusion, memory issues, ringing in the ears, blurred vision, and behavioral changes.

Moderate to severe injuries may cause nausea, vomiting, slurred speech, limb weakness, cognitive difficulties, and can even be fatal.

3. Some People Are More at Risk Than Others

Those at highest risk include children (especially ages 0–4), young adults (15–24), adults 60 and older, and males across all age groups.

Prevention steps include always wearing a seatbelt, ensuring airbags are functional, avoiding alcohol, drugs, or impairing medications while driving, and using helmets during appropriate activities. Staying aware of your surroundings—such as avoiding phone use while crossing streets—also reduces risk.

4. Childhood TBIs Can Affect Brain Development

When a child sustains a TBI, the impact differs from adults. An injury to a developing brain can limit participation in school and activities, disrupt normal development, and cause short- or long-term changes in thinking, behavior, and overall health.

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5. It’s Common To Miss TBIs in Older Adults

Older adults face a higher risk of falls and accidents, leading to greater likelihood of hospitalization and death from TBIs compared with other age groups.

Symptoms are frequently missed or misdiagnosed because they overlap with conditions common in this age group, such as dementia. Healthcare providers should carefully evaluate older adults—especially those on blood thinners—after any fall or car accident.

6. Treatment Depends on Severity

Treatment varies according to the type and severity of the injury. Mild cases typically require rest at home, with most people resuming normal activities within a few days. More serious injuries demand longer recovery focused on activating the brain’s neuroplasticity to regain function.

Effective therapies include speech therapy, physical therapy, occupational therapy, and cognitive training to improve attention, memory, problem-solving, and learning.

7. Diagnosis Can Be Challenging

TBI symptoms can be subtle, often requiring multiple tests for accurate diagnosis. The process usually begins with a medical and neurological exam assessing motor function, eye movement, coordination, cognition, and reflexes.

Imaging such as MRI or CT scans helps detect bleeding or rule out other issues, though they cannot identify every TBI. Diagnosis is therefore a comprehensive process rather than reliance on a single tool.

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