A new technology developed by researchers at the University of Texas at Austin aims to simplify brainwave analysis. By printing a temporary tattoo onto a person’s scalp, electroencephalography (EEG) can be made easier and more accurate.
The current method uses electrodes placed on the scalp, but technicians must spend time measuring and marking the area for accurate readings. A gel used to detect brain signals dries out over time, causing issues with accuracy. Additionally, cables connected to the electrodes can cause discomfort and interfere with subtle electric signals.
To address these problems, researchers have created a temporary tattoo made from highly conductive and durable ink that doesn’t irritate the skin. The ink is printed onto the scalp using a computer program and robotic arm, creating a personalized design based on a 3D scan of the scalp.
The tattoo consists of two formulations: one for detecting brain signals and another for connections to the neck. Physical wires carry the signals to a small device that records the data. According to the researchers, the technology has been successful in people with bald heads and buzz-cut hairstyles, but further testing is needed for individuals with long, thick hair.
Future developments could include modifying nozzle designs or incorporating robotic fingers for hair parting, making the process fully wireless possible. The new technology offers a promising solution for high-quality brain monitoring.
Source: https://www.newscientist.com/article/2458409-temporary-scalp-tattoo-can-be-used-to-record-brain-activity