Why do some people stay mentally sharp well into their seventies and eighties, while others begin to struggle with memory much earlier in life? MindCrowd, an ambitious online brain study created at TGen, set out to explore that question more than a decade ago. Instead of bringing small groups of volunteers into a lab, Matt Huentelman, Ph.D., and his team did something almost unheard of at the time: they opened the study to anyone with an internet connection. In just a few minutes, participants answered basic questions and completed simple tasks that measured memory and reaction time.
Over time, those millions of data points have revealed how thinking, learning, and remembering evolve across the human lifespan. Today, MindCrowd is nearing an extraordinary milestone: one million participants. That massive, global dataset representing people of all ages, backgrounds, and countries has made possible discoveries that simply couldn’t be captured in traditional studies.
Researchers have seen clear patterns in how response time changes with age, consistent performance differences between men and women, and even surprising findings about participants with high blood pressure. And despite our widespread fears about Alzheimer’s and dementia, MindCrowd reinforces a hopeful truth: roughly 87 percent of us will not experience dementia in our lifetime.
As the project approaches the one-million mark, Dr. Huentelman joins us to talk about what study’s already taught us, the outliers who intrigue him most, why identifying the factors that protect, or challenge, our brain health matters to every one of us, and how this work moves us closer to the goal of precision aging.
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Why do some people stay mentally sharp well into their seventies and eighties, while others begin to struggle with memory much earlier in life? MindCrowd, an ambitious online brain study created at TGen, set out to explore that question more than a decade ago. Instead of bringing small groups of volunteers into a lab, Matt Huentelman, Ph.D., and his team did something almost unheard of at the time: they opened the study to anyone with an internet connection. In just a few minutes, participants answered basic questions and completed simple tasks that measured memory and reaction time.
Over time, those millions of data points have revealed how thinking, learning, and remembering evolve across the human lifespan. Today, MindCrowd is nearing an extraordinary milestone: one million participants. That massive, global dataset representing people of all ages, backgrounds, and countries has made possible discoveries that simply couldn’t be captured in traditional studies.
Researchers have seen clear patterns in how response time changes with age, consistent performance differences between men and women, and even surprising findings about participants with high blood pressure. And despite our widespread fears about Alzheimer’s and dementia, MindCrowd reinforces a hopeful truth: roughly 87 percent of us will not experience dementia in our lifetime.
As the project approaches the one-million mark, Dr. Huentelman joins us to talk about what study’s already taught us, the outliers who intrigue him most, why identifying the factors that protect, or challenge, our brain health matters to every one of us, and how this work moves us closer to the goal of precision aging.
This month, TGen Talks explores polygenic risk scores with Dr. David Duggan, an associate professor in the Quantitative Medicine and Systems Biology Division at TGen. A polygenic risk score is a number that indicates the combined effect of many genetic variants on a person's risk of developing a certain trait or disease. Each genetic variant adds a small amount to the overall risk. When these small effects are added together, they help predict the likelihood of developing the trait or disease.
Think of the human genome as a deck of cards, where each card represents a different genetic variant. The value of each card represents the risk contribution of that variant. For example, an Ace might represent a high-risk variant (4 points), while a 2 might represent a low-risk variant (1 point). Let's assume all contributions are positive for simplicity, although in reality, some variants might reduce risk. Imagine drawing 10 cards from the deck randomly. These 10 cards represent the genetic variants you inherited from your parents. Each card has a point value (risk contribution). Adding up the points of the 10 cards gives you your polygenic risk score. This score indicates your genetic predisposition to the trait or disease. You can then compare this score against population averages or thresholds to determine if you are at higher or lower risk for the trait or disease.
In this analogy, each card represents a genetic variant, and its point value represents its contribution to your overall genetic risk for a specific trait or disease. The polygenic risk score is the sum of these contributions, much like summing the values of drawn cards to get a total score. This information can help you and your doctor make informed health decisions, such as focusing on preventive measures. Dr. Duggan notes that lifestyle factors also play a significant role in disease risk, sometimes reducing genetic risk by up to 50%.
Whether you’re a healthcare professional, a genetics enthusiast, or just curious about the future of personalized medicine, this month’s TGen Talks is worth the listen.
TGen Talks
Why do some people stay mentally sharp well into their seventies and eighties, while others begin to struggle with memory much earlier in life? MindCrowd, an ambitious online brain study created at TGen, set out to explore that question more than a decade ago. Instead of bringing small groups of volunteers into a lab, Matt Huentelman, Ph.D., and his team did something almost unheard of at the time: they opened the study to anyone with an internet connection. In just a few minutes, participants answered basic questions and completed simple tasks that measured memory and reaction time.
Over time, those millions of data points have revealed how thinking, learning, and remembering evolve across the human lifespan. Today, MindCrowd is nearing an extraordinary milestone: one million participants. That massive, global dataset representing people of all ages, backgrounds, and countries has made possible discoveries that simply couldn’t be captured in traditional studies.
Researchers have seen clear patterns in how response time changes with age, consistent performance differences between men and women, and even surprising findings about participants with high blood pressure. And despite our widespread fears about Alzheimer’s and dementia, MindCrowd reinforces a hopeful truth: roughly 87 percent of us will not experience dementia in our lifetime.
As the project approaches the one-million mark, Dr. Huentelman joins us to talk about what study’s already taught us, the outliers who intrigue him most, why identifying the factors that protect, or challenge, our brain health matters to every one of us, and how this work moves us closer to the goal of precision aging.
