What We Got Wrong
10 years ago
A tiny brainstem cluster called the locus coeruleus blasts one alertness signal to the whole brain. Like a foghorn. Raise it, everything wakes up at once.
  Now
Allen Institute scientists mapped almost 35,000 neurons in this cluster in mice. In mice, it sends separate, targeted messages to different brain regions — not one broadcast. It’s a postal network, and one of the first systems to fail in Alzheimer’s.
Allen Institute · Nature · September 2026
Daily Brain Exercise
 
Mental Math
Cognitive processing speed is what lets you think on your feet. Give this one a shot — try to clear 10 problems in under 60 seconds.
Play Mental Math →

That IPO minted 4,400 millionaires overnight.

If this is 180 times bigger…

Just imagine how many more Americans will become millionaires.

Will you be one of them?

Research
 
Active Parkinson’s Patients Barely Lost Any Brainpower Over Seven Years
It starts with tremors. Parkinson’s is known for shaking hands and rigid muscles. But it also erodes memory and clear thinking. That side gets far less attention.
A seven-year study just changed the conversation. Researchers at the University of Cincinnati tracked 294 adults with mild to moderate Parkinson’s. They grouped them by weekly physical activity: under four hours, four to eight hours, or more than eight.
The gap was wide. People in the least active group lost nearly half a point per year on a standard 30-point test of thinking and memory. The mid-range group lost 0.09 points. And the most active group? They lost 0.007 points a year. Their scores barely moved.
  Let me explain what those numbers add up to. Over seven years, the least active group would drop more than three full points — enough to flag on a doctor’s screening. The most active group would barely budge.
Movement symptoms told the same story. The least active got slowly worse each year. The most active actually improved slightly. And these results held after adjusting for age, sex, and time since diagnosis.
The activities were ordinary — brisk walking, doubles tennis, vacuuming, mowing the lawn. Nothing extreme. Lead author Dong-Woo Ryu, at the University of Cincinnati, was careful to say this doesn’t prove exercise caused the slower decline. People who stay active may differ in ways we can’t yet measure.
I believe this is one of the cleanest patterns we’ve seen linking physical activity to slower decline in Parkinson’s — both in thinking and in movement. I could be wrong. It’s still observational data. But the dose curve is too consistent to set aside. If someone you know has Parkinson’s, I urge you to pass this along. Even four hours of weekly activity made a real difference.
Ryu et al. · Neurology · October 7, 2026
Worth Trying
 
The Three-Minute Balance Practice That Trains Your Brain
Balance fades before memory does. Your inner ear, your eyes, and tiny sensors in your feet all send data to the brain at the same time. The cerebellum — a fist-sized structure at the base of your skull — crunches those signals every second you’re upright. It’s one of the most demanding tasks your brain runs.
So a single-leg stance is a brain test, not just a leg test. It forces your cerebellum, prefrontal cortex, and vestibular system — the balance center in your inner ear — to coordinate under pressure. That three-way conversation builds what researchers call cognitive reserve. Think of it as a savings account your brain can draw on as it ages.
The protocol is dead simple.
The Protocol
When
Morning — while the coffee brews
Duration
3 minutes, every day
Rules
Stand on one leg for 30 seconds. Switch. Repeat 3 times each side. Week 1: eyes open, one hand near a counter. Week 3 and beyond: eyes closed, with hand support. No shoes — bare feet give your brain more sensory data to work with.
 
You’ll wobble. That’s the point — every wobble is your brain recalculating in real time. I urge you to try it.
Lab Notes
Titanium Dust From Dental Implants Can Hijack Immune Cells
Bacteria can slowly corrode dental implants, releasing microscopic titanium particles into the surrounding tissue. Rutgers researchers found those particles trap immune cells called macrophages — the body’s cleanup crew — in a loop of runaway inflammation that destroys jawbone. That’s why antibiotics fail in the up to 20% of implant patients who develop infections. The team identified a calcium channel that the particles activate and blocked it in mice, stopping the disease. Chronic oral inflammation has long been tied to higher Alzheimer’s risk, so a new way to shut it down matters well beyond the dentist’s chair.
Kotsakis et al. · PNAS Nexus · April 2026
Whole-Body MRI Study Links Sleep Efficiency to Parietal Gray Matter Volume and Belly Fat
New imaging data from Prenuvo’s ongoing whole-body MRI study found that people who spend a higher share of their time in bed actually asleep — a measure called sleep efficiency — tend to have greater parietal gray matter volume and less visceral belly fat. The connection matters because abdominal fat drives insulin resistance, and insulin resistance is now considered one of the key pathways linking metabolic dysfunction to brain decline. These patterns showed up in adults undergoing preventive screening, suggesting the damage starts quietly and early.
Prenuvo Research · October 2026
Personalized Brain Mapping Pushes PTSD Remission to 68%
An FDA-cleared treatment that uses brain imaging to guide magnetic stimulation achieved 68% remission and a 52% symptom drop in a post-traumatic stress disorder trial. Instead of aiming magnetic pulses at a one-size-fits-all brain target, the system maps each patient’s unique activity patterns and targets the abnormal zones directly. The same personalized approach is now being explored for depression and anxiety — conditions that share overlapping circuits and raise the long-term risk of cognitive decline.
ScienceDaily · October 23, 2026
Will It Work?
Alpha-GPC — “The Best Choline Source for Your Brain”
Alpha-GPC is a choline compound that crosses into the brain more easily than most supplements. Your brain needs choline to build acetylcholine — the chemical messenger that carries memory signals between neurons. A 2017 study gave 48 healthy young men 250mg or 500mg and found no difference in reaction times. Older Italian trials from the 1990s used 1,200mg daily in Alzheimer’s and stroke patients and reported modest cognitive gains over six months.
But no large, controlled trial has tested it in healthy adults over 55 — the group buying most of it. And a 2021 analysis of over 12 million Korean health records found long-term Alpha-GPC prescriptions linked to higher stroke rates. That was observational, not proof of cause. But the flag still hasn’t been cleared. No one has compared it head to head with simply eating one or two eggs a day, either — which delivers about the same choline at a fraction of the cost.
Verdict: Wait for larger trials in older adults. Eat eggs for your choline. If you still want to try it, stay at 300–600mg and talk to your doctor about the stroke question.