Exam Anxiety: What’s Happening in Your Brain (and What Actually Helps)

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That Feeling Before the Exam

You’ve studied. You know the material. And yet, two hours before the exam, you’re sitting in your dorm room with your stomach in knots, your palms slightly sweaty, and a voice in your head asking, “What if I blank? What if I fail? What if I’m not actually prepared?” Welcome to exam anxiety—and you’re definitely not alone.

That pre-exam dread is so universal that it barely needs explanation. Whether you’re an engineering student facing a thermodynamics final or a humanities major staring down an essay exam, anxiety before high-stakes assessments is just part of the student experience.

The thing is, feeling some anxiety isn’t a sign you’re doing something wrong. In fact, it’s a sign your brain is treating this situation seriously. Understanding what’s actually happening in your brain can change how you respond to it.

What’s Actually Happening in Your Brain

When you sit down for an exam, your brain’s threat-detection system kicks into high gear. Your amygdala—the almond-shaped part of your brain responsible for processing emotions—suddenly treats the exam like a potential threat. So it activates your fight-or-flight response.

Your body floods with cortisol and adrenaline. Your heart rate increases, breathing becomes shallow, and blood flow shifts away from your prefrontal cortex—the part handling complex thinking and accessing information you’ve studied—toward your muscles and emotional centers. Useful for running from a predator. Less useful for solving a calculus problem.

Neuroscientists call this an “amygdala hijack.” Your prefrontal cortex is still there, but it’s been demoted. The irony? This is your brain trying to protect you. It’s not malfunctioning—just responding with an intensity that doesn’t quite match the actual stakes.

Helpful Stress vs. Harmful Anxiety (The Yerkes-Dodson Curve)

Not all pre-exam stress is bad. A certain amount actually improves your performance. The Yerkes-Dodson Law shows a curve: low arousal means low performance, but as arousal increases, performance goes up—until a sweet spot. Push too far into anxiety territory, and performance tanks.

The goal isn’t to eliminate stress. It’s to find your sweet spot—the level of activation where you’re sharp and engaged but not spiraling. You’re not aiming for zero stress. You’re aiming for “optimized stress.”

Why “Just Relax” Doesn’t Work

Trying to suppress anxiety often makes it worse. Your brain reads it as: “Your feelings are wrong.” Suddenly you’re anxious about the anxiety.

What works better is cognitive reappraisal. Instead of pushing anxiety away, reframe it. That racing heart? That’s your body getting ready for a challenge. Studies have found that students who reframe pre-exam anxiety as excitement actually perform better than those who try to calm down. Your amygdala has already activated—but you get to choose what that activation means.

What Actually Helps: Before the Exam

• Spaced studying is probably the most powerful tool. Spreading study across days reduces pre-exam panic. Calmness often follows competence. Student Academic Success Services (SASS) offers tools for time management, study strategies, and exam preparation at sass.queensu.ca.

• Practice testing is equally important. When you’ve seen similar questions before, the actual exam feels less threatening.

• Sleep the night before genuinely helps. Sleep deprivation amplifies anxiety and tanks cognitive performance. Aim for 7–9 hours. If sleep is a consistent struggle, consider booking a 1-on-1 Peer Wellness Coaching sleep appointment through Student Wellness Services.

• The brain dump technique: spend the first 2–3 minutes of the exam writing down everything you’re worried about forgetting. Once written down, your brain can release it.

  
  

What Actually Helps: During the Exam

• The 5-4-3-2-1 grounding technique: notice 5 things you can see, 4 you can feel, 3 you can hear, 2 you can smell, 1 you can taste. Takes about a minute.

• Slow exhale breathing: breathe in for 4 counts, hold for 4, out for 6. The extended exhale activates your parasympathetic nervous system.

• Start with what you know. Don’t begin with the hardest question. Build confidence by answering what you’re sure about first.

• Skip and return. If a question spikes your anxiety, skip it. Come back with a calmer nervous system.

  
  

What Actually Helps: Between Exams

• Avoid post-mortems with classmates. Comparing answers is pure anxiety fuel. You can’t change anything now.

• Move your body. Movement helps metabolize stress hormones and shifts your nervous system out of fight-or-flight. 1-on-1 Peer Wellness Coaching physical activity appointments can help you build a realistic movement routine—book through Student Wellness Services.

• Maintain your routine. Keep eating, sleeping, and moving. Your next exam will go better if you’re not running on fumes.

  
  

When It’s More Than Normal Exam Stress

If anxiety consistently interferes with your ability to prepare, your sleep is disrupted for weeks, you’re experiencing panic attacks, or you’re avoiding exams altogether—that’s a sign you might benefit from additional support. Student Wellness Services offers mental health therapy appointments. Queen’s Student Accessibility Services (QSAS) offers academic accommodations, including exam accommodations—note that setting these up takes time, so it’s worth looking into early. Visit queensu.ca/studentwellness/accessibility-services for more information.

Your Next Step

Pick one strategy from this article. Just one. Try it intentionally for your next exam. Exam anxiety shifts when you understand what’s happening in your brain and have concrete tools to respond.

References

• American Psychological Association. (2023). Stress effects on the body. Monitor on Psychology, 54(1), 16–17.

• Chandra, S., et al. (2023). Exam anxiety in university students: A systematic review. Educational Psychology Review, 35(2), 42–68.

• Jamieson, J. P., et al. (2022). Mind over matter: Reappraising arousal improves cardiovascular function. Journal of Experimental Psychology: General, 151(12), 3008–3016.

• Tomlinson, J. M., et al. (2023). Cognitive load reduces performance in high-anxiety students. Frontiers in Psychology, 14, 1087–1103.

• Queen’s University SASS. (2024). Managing test anxiety. Kingston, ON.