We know exercise reduces dementia risk. So does good sleep, social engagement, and healthy eating. But there's a catch: all of these take time. And time, according to a provocative commentary in The Lancet Healthy Longevity, is itself a social determinant of brain health that we've largely ignored.
If you were to catalog everything in your brain by weight, glycans would barely register. These complex sugar molecules, attached to proteins and lipids, make up less than 1% of brain mass. They're the molecular equivalent of that drawer in your kitchen that you never think about until you need...
You know that feeling when you're trying to work and there's construction noise outside, your coworker is humming, the fluorescent lights are buzzing, and somehow you can hear someone three cubicles over eating chips? Now imagine feeling that overwhelmed all the time. For many people with fragile X...
Next time you're standing awkwardly at a networking event, wondering whether to approach that interesting-looking stranger, just know that your brain is doing some very sophisticated mathematics in the background. And those calculations? They're running on the same neural hardware that helps...
Think about everything your brain does with sensory information. Light hits your eyes and you see. Sound waves hit your ears and you hear. Something touches your skin and you feel it. Each type of sensation has its own dedicated processing area in your cortex, and somehow, the wiring that connects...
You've probably heard about place cells in the hippocampus, those neurons that fire when you're in a specific location. They famously "remap" when you enter a new environment, with the same neurons firing in different places as your brain recalibrates its internal GPS. A study in Cell Reports found...
Your adult brain is constantly making new neurons. Not everywhere, but in specific regions, fresh nerve cells are being born, and they have a problem: they're not born where they need to be. These newborn neurons have to pack their bags and migrate through brain tissue to reach their final...
The brain loves organization. In the visual system, neighboring points in space map to neighboring neurons in visual cortex. It's called retinotopy, and it's so orderly you can basically draw a little picture of the visual world right on the brain's surface. The auditory system has its own version...
You've heard of the placebo effect: believe a sugar pill will help you and it actually might. Your expectations shape your physical experience in measurable ways. But there's a darker twin to this phenomenon called the nocebo effect, where negative expectations make you feel worse. Tell someone a...
Should you try that new restaurant downtown, or stick with your reliable pizza place? Your brain is quietly running two completely separate calculations to answer that question. And according to a study in eLife, these aren't just opposite ends of one scale. They're different mental operations...
Your brain's action control system has what scientists call "direct" and "indirect" pathways. One says "go," the other says "stop." A study in eLife found that these aren't just separate highways in the striatum. The cortex sends them different messages from the very beginning, using distinct...
You've experienced it thousands of times. You're lying in bed, sort of awake, sort of not, and then you're just... asleep. It happens every night, and yet if someone asked you exactly when you fell asleep, you'd have no idea. The transition seems to just happen, somewhere in that foggy zone between...
Quick: look around the room you're in. You see a chair. A phone. Maybe a coffee mug. Those are things. But you also see the wood grain of the table, the coffee in the mug, the air itself (well, sort of). Those are stuff. Congratulations, your brain just performed a categorization task that...
Here's the thing about living in the real world: everything happens at once. You're not just breathing air pollution OR experiencing chronic stress OR getting exposed to industrial chemicals. You're doing all of it simultaneously, while also sleeping badly, eating questionable takeout, and maybe...
Ever wonder how your brain knows it's morning before you've even opened your eyes? There's a tiny squad of specialized cells in your retina working round the clock to keep your internal rhythm synced with the sun. But here's where it gets interesting: a new study in Cell Reports reveals that these...
The age at which someone gets diagnosed with autism varies wildly. Some children are identified before they can tie their shoes. Others don't get a diagnosis until they're teenagers, adults, or sometimes never at all. The usual explanations for this have focused on things like access to healthcare,...
Misinformation spreads faster than ever. A review in Neuroscience & Biobehavioral Reviews examines what makes some people more susceptible than others.
You know how after a nerve injury, even the lightest touch can feel like someone's attacking you with a cheese grater? Turns out there's a very specific molecular villain behind this, and scientists just caught it red-handed. A study in The Journal of Clinical Investigation reveals that after nerve...
Your body is running a ridiculously precise 24-hour clock in nearly every cell you own. It tells you when to sleep, when to eat, when to be alert, and when to feel like a zombie. The engineering behind this system is genuinely impressive, with multiple redundant controls and feedback loops that...
Neurons adjust their sensitivity when activity drops - a process called homeostatic synaptic plasticity. A study in eLife identifies a presynaptic protein essential for this compensation in cortical cultures.
