What Is CTE? Causes, Symptoms & Academic Guidance (Guide)

Investing in your health literacy is just as important as investing in your college education. When you understand complex terms like Chronic Traumatic Encephalopathy (CTE), you gain the power to make informed decisions about sports, safety, and your long-term well-being. This knowledge acts as a protective layer for your future career and academic success.

Throughout my eighteen years in higher education, I have sat across from many students who felt lost. Usually, they were confused by terms like “articulation agreements” or “credit hours.” However, the most difficult conversations I have ever had involved student-athletes who were struggling with their health. I remember a student named Marcus, a talented football player who suddenly found it hard to focus in his sophomore year. He was a bright young man, but he started missing assignments and losing his temper in advising sessions. At the time, we didn’t have the words to describe what might be happening in his brain. Today, we use the term CTE to describe the condition that researchers believe causes these types of changes. My goal is to help you understand this term with the same clarity I use to explain a degree audit.

What is CTE? (Chronic Traumatic Encephalopathy)

CTE is a progressive brain disease caused by repeated head injuries. It involves the buildup of a protein called tau, which damages brain cells over time. Currently, doctors can only confirm the disease by examining the brain after a person has passed away, making it a unique challenge for researchers.

When we talk about CTE, we are talking about a “degenerative” condition. This means the symptoms get worse over time. It is not a single event like a broken arm. Instead, it is a slow change in the brain’s physical structure. In my work with student-athletes, I have observed that this terminology often scares people because it sounds so final. However, understanding the science helps remove the mystery.

The disease is most often found in people who have played contact sports like football, boxing, or ice hockey. It has also been found in military veterans who were exposed to explosive blasts. The key factor is not just one big hit, but many small hits over a long period. These smaller hits are often called “sub-concussive” impacts because they do not cause immediate symptoms like a traditional concussion.

How does Repetitive Head Impact Lead to CTE?

Repetitive head impact refers to many bumps or jolts to the head that happen over months or years. These hits do not always cause a concussion, but they can still cause the brain to move inside the skull. Over time, this movement triggers the release of abnormal proteins that hurt brain health.

Think of the brain as a delicate piece of fruit inside a hard plastic container. If you shake the container gently but constantly, the fruit will eventually start to bruise, even if the plastic never breaks. This is a helpful way to visualize how sub-concussive hits work. In an academic setting, we often focus on the “big” moments like exams. But just as small, daily study habits build a GPA, small, daily hits can build up damage in the brain.

Research from organizations like the VA-BU-CLF Brain Bank has shown that the length of time a person plays a contact sport matters. For every year of playing tackle football, the risk of developing CTE may increase. This is why many high schools and colleges are changing their practice rules to limit contact. As a student or parent, knowing these facts helps you advocate for safer training environments.

What are the Observable Behavioral Signs of CTE?

Behavioral signs are changes in how a person acts, speaks, or interacts with others. In the context of CTE, these shifts often include sudden mood swings, increased irritability, or social withdrawal. These changes are “observable,” meaning friends and family members are usually the first people to notice that something is different.

In my advising office, I have observed these shifts firsthand. A student who was once social and outgoing might suddenly stop showing up to club meetings. They might become defensive when asked about their grades. These aren’t just “personality quirks.” They can be clinical signs of a brain struggling to regulate emotions.

• Mood Swings: Rapid changes from happy to very sad or angry.
• Irritability: Getting upset over small things that didn’t matter before.
• Social Withdrawal: Avoiding friends, family, and team activities.
• Impulsivity: Making quick decisions without thinking about the consequences.

If you are a new academic advisor, it is vital to notice these patterns. When a student’s behavior changes drastically over one semester, it is often a sign that they need a referral to a health professional. We must look past the “lazy student” stereotype and consider the physical health of the brain.

How Do Cognitive and Physical Changes Appear?

Cognitive changes involve how we think, learn, and remember information. Physical changes involve how we move our bodies and maintain balance. For someone living with suspected CTE, these changes might look like losing track of a conversation, forgetting a class schedule, or feeling unsteady while walking across campus.

In the classroom, cognitive decline can be devastating. I once worked with a graduate student who had played sports for a decade. He described it as a “fog” that wouldn’t lift. He could read a page in a textbook three times and still not understand the main idea. This is what we call executive dysfunction. It affects the brain’s ability to plan, focus, and multitask.

• Memory Loss: Forgetting recent events or conversations.
• Executive Dysfunction: Difficulty planning a day or finishing a project.
• Confusion: Feeling “lost” even in familiar places.
• Motor Instability: Problems with balance or walking.

These symptoms often don’t appear until years after the head impacts have stopped. This is why it is so confusing for students in their early 20s. They might feel fine now, but the “investment” they made in their sport during high school could have delayed costs. Understanding this timeline is essential for long-term career planning.

Why is Post-Mortem Diagnosis the Current Standard?

Post-mortem diagnosis means that the disease can only be officially identified after a person has died. Pathologists look at thin slices of brain tissue under a microscope to find specific patterns of tau protein. There is currently no blood test, MRI, or CT scan that can prove a living person has CTE.

This is one of the most misunderstood parts of the CTE conversation. You might see a news report saying an athlete “has CTE.” In reality, the report should say the athlete is “showing symptoms consistent with CTE.” As a clear communicator, I want to emphasize that we cannot give a definitive diagnosis to anyone who is still alive.

Scientists are working hard to change this. They are looking for “biomarkers,” which are signs in the blood or brain fluid that could point to the disease early. Until then, doctors focus on treating the symptoms. For example, if a student has memory issues, they might get academic accommodations through a campus disability office, regardless of whether the cause is CTE or something else.

Comparing Brain Health Terms

To help you navigate these terms, I have created a table that compares common brain health issues you might hear about in college or in the news.

Navigating Academic Policies and Support Systems

Academic policies are the rules that govern how you progress through your degree. If you are experiencing health challenges, whether from a concussion or other brain health concerns, you need to know how to use these policies. This includes things like medical withdrawals, “Incomplete” grades, and disability accommodations.

In my years of advising, I have seen students try to “power through” brain fog. This almost always leads to a lower GPA and increased stress. Instead, I encourage students to be proactive. If you have had a history of head impacts and you notice your memory slipping, your first stop should be the Dean of Students or the Office of Disability Services.

• Medical Withdrawal: Allows you to leave classes for health reasons without hurting your GPA.
• Incomplete Grade (I): Gives you extra time to finish a course after the semester ends.
• ADA Accommodations: Provides tools like extra testing time or note-taking assistance.

For international students, navigating these systems can be even harder due to visa requirements. If you take a reduced course load for health reasons, you must work closely with the International Student Office to ensure your visa remains valid. Never make a decision about your health without checking how it affects your legal status in the country.

Actionable Steps for Students and Parents

If you are concerned about brain health and CTE, there are specific steps you can take today. These steps focus on prevention, observation, and seeking the right kind of help. You don’t have to wait for a crisis to start protecting your academic investment.

1. Prioritize Safety Equipment: Ensure helmets and pads are up to date and fit correctly.
2. Follow “Return to Play” Protocols: Never return to a sport until a doctor clears you after a hit.
3. Document Symptoms: Keep a journal of any changes in mood, sleep, or memory.
4. Ask Questions: Talk to coaches about their “concussion culture.” Do they encourage players to sit out if they are hurt?
5. Consult Specialists: See a neurologist who specializes in sports medicine if you have concerns.

For new advisors, your role is to be a “first responder.” You don’t need to be a doctor to notice that a student’s grades are dropping at the same time their personality is changing. Use your campus resources. Build a relationship with the athletic department so you can advocate for the students you share.

Frequently Asked Questions (FAQ)

Can a doctor tell me if I have CTE right now?

No, a doctor cannot definitively diagnose you with CTE while you are living. They can only tell you if your symptoms—like memory loss or mood swings—are consistent with the disease. They will often use tests to rule out other problems, such as vitamin deficiencies, sleep apnea, or depression, which can cause similar symptoms.

Is one concussion enough to cause CTE?

Current research suggests that CTE is not usually caused by a single concussion. Instead, it is linked to repetitive head impacts over many years. This includes both concussions and “sub-concussive” hits that don’t cause immediate symptoms. However, every brain is different, and researchers are still studying how many hits it takes to trigger the disease.

What should I do if I think my student-athlete is showing signs?

The first step is to schedule an appointment with a healthcare professional, preferably a neurologist or a sports medicine specialist. You should also contact the school’s athletic trainer. It is helpful to bring a list of the specific behavioral or cognitive changes you have observed to the appointment.

Do helmets prevent CTE?

While helmets are excellent at preventing skull fractures and some types of traumatic brain injuries, they do not “cure” or fully prevent the risk of CTE. This is because the brain can still move and shake inside the skull even when a helmet is worn. Helmets are a vital safety tool, but they are not a total shield against the effects of repetitive impact.

Can I still play sports if I’m worried about CTE?

Many people continue to play sports while taking steps to reduce their risk. This includes choosing non-contact versions of sports (like flag football), limiting the number of years played, and ensuring that teams follow strict safety protocols. The goal is to balance the many benefits of sports—like teamwork and fitness—with the need for long-term brain health.

How does CTE affect a student’s financial aid?

CTE itself doesn’t directly affect financial aid, but the symptoms can. If a student’s grades drop (lowering their GPA) or if they have to drop classes, they might fall below “Satisfactory Academic Progress” (SAP) standards. This can lead to a loss of scholarships or federal loans. This is why using medical withdrawal policies is so important for protecting your financial future.

Are there any treatments for the symptoms of CTE?

While there is no cure for the underlying disease, many of the symptoms can be managed. For example, mood swings and depression can be treated with therapy or medication. Cognitive issues can be helped with occupational therapy or academic accommodations. Early intervention is key to helping a person maintain their quality of life.

What is the difference between CTE and Alzheimer’s?

Both are brain diseases that involve protein buildup, but they affect the brain differently. Alzheimer’s usually starts with memory loss in older age. CTE often starts with behavioral and mood changes, sometimes in younger or middle-aged adults, and is specifically linked to a history of head trauma. The pattern of the tau protein in the brain is also different between the two.

Where can I find reliable data on CTE?

The best sources for verified information include the National Institutes of Health (NIH), the Centers for Disease Control and Prevention (CDC), and the Concussion Legacy Foundation. These organizations provide updated research and resources for families and athletes.

Does CTE only happen to professional athletes?

No. While many famous cases involve professional players, CTE has been found in people who only played through high school or college. It has also been found in military veterans and victims of domestic violence. Anyone who experiences repetitive head trauma is potentially at risk.

(This article was written by one of our staff writers, Alan Westbrook. Visit our Meet the Team page to learn more about the author and their expertise.)