my name is anna wexler. i'm a professor of medical ethics at the university of pennsylvania. and i run a research lab that studies the ethical. busy legal and social implications of advances and neuroscience. i so i guess i think the biggest challenge is separating ourself from science, fat, and science fiction. we have watched the movies where the side books take over. sandy has a brain implant in parting their head and then they go wild at everything goes upside down and it's chaotic. this is not what we're talking about. what we're talking about is brain computer interface or b c. i karen briefly in an accessible way. what does that mean? thanks for asking. so a brain computer interface is really a communication device that connects the brain to an external computer. and there's 2 ways that that communication can happen. so one way is that the computer can sense electrical activity and send that to a prosthetic device. so in the example you gave though, someone could drink a beer, who otherwise would be able to, or the device can work the other way, where it can send signa