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The number of people worldwide with dementia is projected to reach 139 million by 2050, but it is still thought to be underdiagnosed. A new innovation aims to change that—Linus Health DCTclock, an upgrade to a longstanding test in which a patient draws the face of a clock with a pen and paper—a simple task that picks up signs of declining spatial reasoning, memory and fine motor skills. Linus’ innovation uses a digitizing pen to capture hundreds of subtler details that might otherwise be invisible to clinicians. —Tara Law

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