Engineers create inkjet-printed tattoo electrodes that record EEG brain activity

European engineers have optimized a new technique for using temporary tattoo electrodes to record brain activity on electroencephalograms (EEGs),media reported. The technology is inexpensive, can be printed with an inkjet printer, and can be output with the same accurate data as conventional electrodes.

Engineers create inkjet-printed tattoo electrodes that record EEG brain activity

Laura Ferrari, one of the authors of the new study, said: “Brain waves fall into the low frequency range and have very low amplitudes for EEG signals. They are more difficult to capture than EMG or ECG signals. “

Engineers create inkjet-printed tattoo electrodes that record EEG brain activity

Tattoo electrodes are made of conductive polymers that can be printed with a standard inkjet printer. Clinical trials have found that the new technique is as effective as conventional electrodes in measuring eEG signals, which require time-consuming applications by trained personnel. In addition, their application requires a wet conductive gel that dries out over a period of time, making consistent measurements unreliable over a long period of time.

Engineers create inkjet-printed tattoo electrodes that record EEG brain activity

The new electrodes provide accurate and stable skin contact that can be maintained for a long time when frequent eEMe measurements are required. Francesco Greco, one of the inventors of the electrode, from the University of Graz, believes the innovative electrode is cheaper and more comfortable to wear than traditional wet electrodes.

The researchers also say the new optimization electrodes should be effective for measurements of brain magnetosphation (MEG). MEG data can often supplement EEG measurements and thus lead to highly positioned brain activity data.

“By using our methods, we were able to produce the perfect MEG-compatible electrode while reducing cost and production time,” Greco added.

The study was published in npj Flexible Electronics.