Understanding Mild Traumatic Brain Injury (mTBI): A brief overview
1st October 2024
by Victoria Allen, Senior Assistant Psychologist
What is mTBI?
Mild Traumatic Brain Injury, often referred to as mTBI, might sound minor, but it can have serious implications. The American Congress of Rehabilitation Medicine (ACRM) defines mTBI as a brain injury resulting from trauma that leads to loss of consciousness for less than 30 minutes, a Glasgow Coma Scale (GCS) score of 13 or higher, and posttraumatic amnesia that lasts less than 24 hours.
This means that even a short period of unconsciousness or temporary memory loss after a head injury can qualify as an mTBI. Often, people with mTBI visit emergency departments right after an injury, but some may not seek help until they notice lingering symptoms days or even weeks later.
Common Causes of mTBI
There are several ways mTBI can occur. Some of the most common include:
- Road Traffic Accidents: Even minor car collisions can cause a head injury.
- Falls: Slips, trips, and falls are a leading cause, especially among the elderly.
- Sports Injuries: Contact sports like football or boxing put athletes at high risk.
- Assault or Domestic Violence: Physical altercations can easily result in head trauma.
- Military Service: Veterans may experience mTBI due to blasts or other combat-related incidents.
What Happens During a Concussion?
Most patients with mTBI experience a concussion, which can be marked by confusion and memory issues even without losing consciousness. Early symptoms may include:
- Headache
- Dizziness or imbalance
- Nausea and vomiting
- Blurred vision or slurred speech
- Difficulty concentrating
The confusion and memory loss may appear immediately or gradually, but typically, a concussion doesn’t show structural damage on standard imaging scans like MRIs or CTs.
Repeated Concussions: A Growing Concern
For athletes or individuals in high-risk occupations, multiple concussions in a short timeframe can lead to something called second impact syndrome. This is when a new concussion occurs before the symptoms of the first one have resolved, increasing the risk of severe brain injury. As awareness of the dangers of repeated concussions grows, sports organisations are implementing stricter guidelines to protect players.
Postconcussion Syndrome: Why Symptoms May Linger
For some, the symptoms of mTBI don’t resolve quickly. This is known as postconcussion syndrome and can include:
- Physical Symptoms: Chronic headaches, dizziness, and neck pain.
- Sleep Disturbances: Trouble falling or staying asleep, often due to pain or anxiety.
- Emotional Changes: Anxiety, depression, irritability, and mood swings.
- Cognitive Difficulties: Problems with memory, concentration, or processing information.
These issues can last for weeks, months, or even longer, significantly impacting quality of life. Most people tend to recover within three months, and by the one-year mark, around 85-90% can return to their regular routines.
What If Recovery Takes Longer?
For the remaining 10-15% who continue to experience persistent symptoms after a year, life can become increasingly challenging. This condition is often referred to as persistent postconcussion syndrome. These individuals may face a combination of ongoing physical pain, cognitive struggles, and emotional difficulties, making it hard to function at work or maintain relationships.
What Causes Persistent Symptoms?
The reasons behind prolonged symptoms are complex. They may be due to:
- Chronic Pain: Persistent headaches, neck pain, or nerve pain can make recovery difficult.
- Psychological Factors: Anxiety and depression are common, and they can exacerbate cognitive and emotional symptoms.
- Cognitive Impact: Difficulty concentrating, memory issues, and slower information processing can create a frustrating cycle.
These interconnected factors often amplify one another, creating a complex web of challenges that can be tough to untangle.
The Role of Psychological Support
For some individuals, persistent symptoms can lead to social isolation, job loss, and strained relationships. This can sometimes be misinterpreted as malingering (pretending to be unwell/injured). However, the reality is that ongoing mTBI symptoms are often rooted in a complex interplay of physical, psychological, and cognitive challenges.
Understanding and addressing these issues with a holistic approach—including medical, psychological, and physical rehabilitation—is key to helping people regain their quality of life.
Breaking the Stigma
It’s important to recognise that not all mTBI cases are the same. Each person’s experience and recovery can vary widely. While some recover quickly, others might need more time and support. Acknowledging the seriousness of mTBI and its potential long-term effects helps break the stigma and encourages those affected to seek the help they need.
If you or someone you know is struggling with the aftereffects of a head injury, don’t hesitate to reach out for professional support. Early intervention and understanding can make all the difference in recovery.
Sources:
https://www.ninds.nih.gov/health-information/disorders/traumatic-brain-injury-tbi