Researchers at the University of California San Diego have developed 3D-printed biosensors that can detect electrophysiological activity coming from the brain.
, which are categorized differently according to the areas of the brain that are impacted during an event.
But even beyond diagnostics, these variables can be helpful if you want to get a better picture of personal performance during exercise. Additionally, these biometric data points can be used to monitor stress and focus levels.And while in-ear sensing of biometric data is not a new innovation, the sensor technology is unique in that it can measure both brain activity and lactate.
Throughout the development of the sensor technology, the researchers had to grapple with some obstacles. They needed to make the sensors as small and thin as possible so that they could collect tiny sweat samples. They also had to integrate “components that can bend” to account for the irregular shape of the ear according to Ernesto De La Paz, a Ph.D. alumnus who co-authored the research.
One primary technical challenge was being able to fit the sensors in the ear, specifically in the tragus of the ear, which is an anatomically unique space situated in front of the ear canal that can vary from one individual to another. This led the researchers to create a “stamp-like stretchable sensor,” which can be easily tacked onto an earbud’s surface.
Despite their capabilities and rosy future as a potential diagnostic aid, the 3D printed sensors really need a considerable amount of sweat in order to be useful for data analysis. But the researchers said down the line the sensors will be more precise, so hard workouts may not be necessary for meaningful sweat analysis.
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