Australian scientists have discovered that they can enhance stroke rehab with the use of a brain-computer interface (BCI) system. The BCIs overcome a previous issue in the technology in which your brain triggers a movement on a screen, but you receive no feedback to your senses. The authors say their device provides the needed feedback, and it provided a single patient with a 36 per cent increase in relevant test scores over the course of the training. They say this proof-of-principle study could pave the way for larger studies to find how intense and frequent feedback should be for perfect BCIs.