I’m fascinated by the exploration of brain function and, specifically, how it relates to education and student success. Neuroscience continues to be a great source of information for building an even better education system.

Before I begin my post on The Neuroscience of Nostalgia, let’s begin with talking about one of my favourite TV shows – M*A*S*H. I’ve watched the series at least 10 times over — probably more.

Why do I watch the same episodes again and again and again?

My ongoing commitment to this 1970s wartime sitcom is not because I’m bored or because I’m too lazy to watch something new — I watch them because they’re familiar. I can predict what’s coming — even knowing many of the script lines. There are no surprise endings. No plot twists. Just dry humour, heartfelt moments, and a sense of comfort in knowing everyone on the TV screen.

And, as it turns out, there’s strong neuroscience behind the importance of this familiarity.

When we rewatch a familiar show, listen to a favourite song, or read a treasured bedtime story to our children, our brains breathe a sigh of relief. The amygdala — the part of the brain that scans for danger like a hypervigilant squirrel — gets to take a break. It recognizes the storyline, the characters, the music. There’s no threat. Just Corporal Radar O’Reilly trying to keep the M*A*S*H camp running smoothly. 

This is what neuroscientists call comfort-watching — something that reduces one’s cognitive load. Your prefrontal cortex — the part of your brain responsible for planning and decision-making gets to rest. When you comfort-watch (or comfort-listen or comfort-read) you already know what happens next. There’s no need to analyze, predict, or problem solve — you just relax and take it all in.

Science has shown that there is a fundamental need for our brains to find that ‘relax mode’ — to not worry about what might be coming next.

A 2012 study found that rewatching familiar shows helps people feel soothed, restored, and emotionally grounded. It’s not about entertainment—it’s about emotional safety. Another study showed that people turn to familiar media when they’re emotionally drained because it provides a sense of control and predictability.

So, how does comfort-watching, or comfort-listening or comfort-reading relate to the classroom? Think about why children insist on hearing the same story over and over again.

Why do Kindergarten students want to sing the same song every morning? It’s not because they lack imagination. It’s because their developing brains crave predictability. Neuroscience shows that repetition strengthens neural pathways, helping children process language, emotions, and cause-and-effect relationships.

There were reports that during the 2020 pandemic that large numbers of people turned to their childhood TV shows and movies. When surrounded by the unknowns of the pandemic, people found themselves surfing to find series or movies that were familiar. When the world feels chaotic, our nervous system reaches for what’s known. Predictable stories act like a buffer between us and the unknown. They bring order to chaos.

And for our students — especially those navigating big emotions, new environments, or transitions — familiarity is a powerful form of regulation.

This is why school routines matter.

Morning circle time on the carpet for Kindergarten students, consistent classroom expectations, emotionally safe spaces where a dysregulated child can surround themselves with familiarity — and, yes, even Pizza Fridays — all help students feel grounded. When we create predictable environments, we’re not just managing behaviour — we’re supporting brain development.

So, don’t despair when a child seeks familiarity. Think of it as their brain ‘taking a breath’ to become centered. Their brains are doing exactly what they’re wired to do — seek safety through familiarity.

And if you find yourself rewatching M*A*S*H, Friends or Star Wars after a long day, know that you’re not being lazy.

You’re self-regulating. Neuroscience says so.