Northwestern University engineers have developed a small, wireless polygraph system you can wear.
The lightweight, bandage-like device gently adheres to the chest, where it simultaneously measures heart activity, breathing patterns, sweat response, blood flow and temperature.
Together, these signals capture a real-time, whole-body view of stress.
By continuously tracking multiple physiological signals at once, the device could help clinicians detect stress and potential discomfort in patients—including infants or the elderly—who may be unable to communicate, diagnose sleep disorders without cumbersome in-laboratory equipment, monitor mental health over time and even sense early warning signs of medical complications.
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