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Wearable EEG patch records stable brain signals over 24 hours, including sleep

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Wearable EEG patch records stable brain signals over 24 hours, including sleep

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Reliably recording brain activity over many hours has so far been fraught with technical and practical challenges. While traditional electroencephalography (EEG) systems provide meaningful data, they are often uncomfortable and typically limited to controlled testing environments. Is it even possible to record EEG signals with good signal quality in everyday situations?

The Mobile Neurotechnologies group at the Fraunhofer Institute for Digital Media Technology IDMT in Oldenburg has an answer to this question. The group is developing a discreet EEG sensor solution for mobile use. In a recently published study in the journal Sensors, the researchers show that the system delivers stable EEG data for at least 24 hours a day, both day and night.

For the study, 10 participants were fitted with the flexible, eight-channel electrode patch "trEEGrid," developed at Fraunhofer IDMT in Oldenburg. Thanks to the pre-applied conductive material, the patented patch can be applied to the face just like a Band-Aid and, unlike dry electrode systems, does not exert any pressure on the head to ensure good signal quality.

The electrode patch was combined with a special miniaturized signal amplifier. It is connected to the patch directly behind the ear, making the system less sensitive to interference caused by cable movement. Power is supplied by a base unit that is carried in a waist or chest pocket and barely restricts freedom of movement.


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