I'm just relaying my wife's explanation from a few days ago and so there could be some things lost in translation. However, here goes. They use EEG to detect br

I'm just relaying my wife's explanation from a few days ago and so there could be some things lost in translation. However, here goes. They use EEG to detect brain patterns developed during activities such as meditation. This is used to trigger an external electromagnetic field generator. They have mice sitting on the field generator which have implants that can in turn be triggered inductively by the electromagnetic field. This switches on an NIR LED inside the mice. The light illuminates a chamber containing designer cells which are programmed to produce a protein (this is the bit I'm not sure about) when exposed to the NIR light. Figure 5 in the paper was very helpful for me.