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"Traditional systems require a spaghetti pile of wires strapped across the body, which makes them awkward for routine use in hospitals and sleep studies. To untangle this problem, researchers built a lightweight, wearable polygraph patch that sticks to the chest and monitors the body’s signs of stress in real time.
The soft wireless device packs in sensors for heart activity, breathing, sweat response, skin temperature, and heat flow linked to blood circulation. Together, those signals help reflect the “multidimensional” nature of stress... the team “crammed as many sensors of physiological processes into this device platform as we could.” The system, which weighs less than 8 grams, runs for over a day while sending data to a smartphone or tablet; machine learning algorithms continuously look for stress signatures. ..."
Wearable polygraph detects hidden stress (original news release) "The body can notice stress before the conscious brain — and that’s no lie"
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