Scientists have made a groundbreaking discovery in the field of brain-computer interface technology, creating a new method for measuring brain waves using liquid ink tattoos that can be printed directly onto the scalp. This innovative technology offers a promising alternative to traditional electroencephalography (EEG) tests, which involve invasive and cumbersome procedures.
The development of the liquid ink tattoo technology was led by researchers from the University of Texas at Austin, who designed a type of conductive polymer-based ink that can flow through hair to reach the scalp. This allowed them to overcome a major challenge in e-tattoo technology, which has only been effective on hairless areas.
The team’s new method uses a computer algorithm to design spots for EEG electrodes on the patient’s scalp and then prints the liquid ink onto these spots using a digitally controlled inkjet printer. The process is quick, requires no contact, and causes no discomfort in patients.
In a test conducted on five participants with short hair, the e-tattoo electrodes performed comparably well to traditional EEG electrodes, detecting brain waves with minimal noise. In contrast, conventional EEG electrodes failed to pick up signals after six hours due to drying out, while the e-tattoo electrodes remained stable for at least 24 hours.
The researchers also developed a new design that allows printed wires to conduct signals without picking up new signals along the way. This innovation paves the way for fully wireless EEG processes in the future.
“This technology has the potential to revolutionize non-invasive brain-computer interface devices,” said co-corresponding author José Millán of the University of Texas at Austin. “E-tattoos can potentially replace cumbersome external devices and print electronics directly onto a patient’s head, making brain-computer interface technology more accessible.”
The discovery is a significant breakthrough in the field of neuroscience and has far-reaching implications for the diagnosis and treatment of neurological conditions.
Source: https://medicalxpress.com/news/2024-12-temporary-tattoo-scalp-easy-hair.html