Your gut and brain are in constant conversation, and the dorsal vagal complex (DVC) is basically the switchboard operator handling all the calls. "Hey brain, the stomach's full." "Got it, sending the stop-eating signal." A study in eLife just mapped out every single cell type in this region, and...
Detecting neurotransmitters is one of those problems that sounds simple until you actually try it. "Just measure the serotonin," you might say. Sure, except serotonin exists at absurdly low concentrations, looks chemically similar to dozens of other molecules in the brain, and tends to hide among a...
There's a 19-subunit molecular machine inside your cells that's been quietly controlling gene expression for your entire life, and unless you're deep into molecular biology, you've probably never heard of it. The Integrator complex isn't going to win any popularity contests. It doesn't have the...
Here's something every addiction counselor and psychiatrist knows but that treatment protocols often ignore: substance use disorders almost never travel alone. They bring friends. Depression, anxiety, PTSD, bipolar disorder. These conditions pile up in the same patients with frustrating regularity,...
The retina is basically a tiny computer at the back of your eyeball, processing light into signals that your brain can understand. All of that processed information leaves through retinal ganglion cells, which are like the USB cables connecting your eye-computer to your brain-computer. Every single...
Your neurons are having conversations about you behind your back. Well, technically about themselves, but still. When an axon gets damaged, there's a whole internal debate happening about how to respond, and it turns out the uninjured parts of the neuron have a surprisingly loud voice in that...
Here's a question that sounds like it belongs in a philosophy seminar but actually matters a lot in hospitals: how do you know if someone is conscious? Not "awake" in the sense of eyes open, but actually experiencing the world, having an inner life, aware of anything at all?
Here's something you probably never asked yourself: "What if my pee tube could taste things?" Well, congratulations, because science has an answer you didn't know you needed. It turns out your urethra contains specialized cells that basically work like taste sensors, and when they detect bacterial...
Here's a frustrating fact about biology: a zebrafish can sever its spinal cord and regrow it, good as new. You, a human, cannot. Your spinal cord injury is permanent. What's the zebrafish got that you don't?
There's a popular story about human evolution that goes something like this: our brains got bigger, especially the prefrontal cortex, and that made us smarter than everything else. Bigger brain equals smarter primate, case closed, let's get lunch.
Here's a puzzle that's been bugging infectious disease doctors for ages: take a bunch of people carrying the exact same bacteria in their noses, and some will go on about their lives completely fine while others develop life-threatening meningitis. Same bug, wildly different outcomes. What gives?
Here's a betrayal you didn't see coming: your nervous system, which is supposed to be on your team, might be helping tumors evade your immune system. Not cool, nervous system. A comprehensive review in the Journal of Hematology and Oncology lays out the growing evidence that nerves actively help...
Your brain loves a good efficiency hack. Why build two separate systems when one will do? This seems to be evolution's philosophy when it comes to how your hippocampus handles memory and timing. According to a study in Cell Reports, the same neurons that help you remember what happened are...
Scientists have been arguing about whether primary sensory cortices only handle their "assigned" sense or whether they moonlight with other senses too. A recent study threw a wrench in things by suggesting that visual signals showing up in unexpected brain regions were actually just face movement...
Here's a plot twist for your Tuesday: the path to clearer thinking might run through your intestines, and specifically through the trillions of bacteria living there. A study in Gut found that alternate-day fasting improves cognitive function in people with obesity, and the effect seems to work...
Picture this: you're at a party and three different guests describe the same person as "tall with brown hair," "medium height with auburn hair," and "lanky with reddish hair." Are they describing the same human? Different people? Impossible to say.
You know that frustrating experience where you're absolutely certain you know something, but you just can't access it? The name of that actor, the word for that thing, that fact you definitely learned in school? The memory is in there somewhere. You can feel it. But the door to it is locked.
Picture this: deep inside your neurons, there's basically a very needy storage warehouse constantly texting the front door. "Hey, we're running low on calcium over here!" And the front door, being a good sport, opens up to let more in. This molecular buddy system turns out to be way more...
Here's the thing about brains: they're all shaped differently. Like snowflakes, but wrinklier and way more opinionated about where they put their folds. This presents a real headache for neuroscientists who want to compare brain scans across different people. It's like trying to overlay a map of...
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.
