@science: “Digital dementia” is a phrase that has gained traction over the last decade, but the science behind it is more complex than headlines suggest. The term, introduced in 2012 by German neuroscientist Manfred Spitzer, refers to memory and attention problems that mirror dementia, thought to arise from heavy reliance on screens and devices. Research does show that excessive passive screen time, like hours of television or endless scrolling, correlates with cognitive decline, weaker memory, and reduced executive function, especially in children and adolescents. Neuroimaging studies even link high device use to reduced gray and white matter in brain regions tied to language and focus. Symptoms often include forgetfulness, difficulty multitasking, and shorter attention spans. But the story is not one-sided. Large-scale studies of older adults paint a different picture: those who actively use digital tools show slower rates of decline and up to a 58 percent lower risk of dementia. Researchers suggest technology may act as “cognitive scaffolding,” supporting independence through reminders, communication, and problem-solving challenges that stimulate the brain. Ultimately, the impact seems to depend less on whether we use technology and more on how we use it. Passive consumption is linked to risk, while active, engaging, and socially connected use may offer protection. Moderation and balance remain essential, limiting notifications, diversifying activities, and setting aside tech-free time all help counteract potential harms. The debate over digital dementia highlights a deeper truth: our brains are shaped by the tools we use daily. The challenge for this generation and the next is not to avoid technology, but to wield it in ways that preserve, rather than erode, our cognitive health. Source: s41562-025-02159-9

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