“Myth: The brain is fundamentally lazy”

There are so many cringey myths floating around pop neuroscience folklore.

Apparently “the brain is fundamentally lazy”.

I have questions.

This myth is on par with “You’re only using 5% (or 10%, whatever) of your brain at any given time”.

Even when you’re lying on the couch doing absolutely nothing, your brain is still metabolically busy. Resting-state fMRI and FDG-PET studies show it’s always humming in the background. So no, it is not “lazy.”

What this myth is trying to get at, but unfortunately has gotten obscured, is something much more interesting.

I THINK what this myth might be getting at is that brains tend to be very good at resource allocation. Our mental workbench, or mental dry erase board (a.k.a., working memory) needs to stay available for incoming input, so the brain is constantly deciding what to keep active, what to discard, and what to pass to long-term memory for further processing.

*A quick clarification: Long-term storage is not just remembering what happened at your 10th birthday party. It’s also remembering what happened early today, or even 5 minutes ago. If you can still access it but it’s no longer actively held in mind, it’s already transitioned into long-term storage - where the brain is constantly updating and reorganizing information in the background. There’s another myth busted!

When neurological injury, fatigue, pain, illness, or overwhelm enter the picture, this resource allocation becomes even more apparent. The brain starts prioritizing what it deems most essential in the moment. That often means higher-level skills (especially executive functions) can become less available. Ever notice word-finding slipping when you’re exhausted or overloaded? That’s your brain prioritizing survival-level demands over precision language or complex reasoning.

With repetition, the brain also gets more efficient. Early on, we rely heavily on frontal/executive systems to consciously guide performance - lots of top-down effort, lots of working memory involved. But over time, practiced skills start to shift into more automatic routines. They need less conscious oversight and less working memory to run. What can look like “effortlessness” isn’t laziness; it’s the brain getting better at doing the thing without having to burn executive resources on it every single time.

Does any of this sound lazy to you? It sure doesn’t to me!

Our brains are constantly balancing effort, efficiency, and survival demands. With repetition, they get better at streamlining things; shifting skills into more automatic routines so executive resources stay available for tasks that actually need them.

The brain takes a lot of abuse if you think about it. Any little blip in functioning can unleash both inner and outer critics. And if a brain is injured, taxed, or strained from any number of causes, it doesn’t get anything like the support a broken limb does. There are no casts for brains; no visible signal that says “this is healing,” “this is under construction,” or “this is struggling right now.”

Brains all over the place are just rolling over in the skull being deemed “lazy” when they’re actually trying to do their job under difficult conditions. They’re running constant background and foreground processes, coordinating an incredible number of automatic functions just so we can interface with the world. That deserves a lot more respect…and a lot of compassion.

So let’s stop the myth here: your brain isn’t lazy. It’s working its tail off, even when you’re asleep. It’s just very, very good at managing resources so it can be ready for whatever comes next. Thanks, little buddy! 🧠🫶🏻