The answer is yes, your brain can be hacked. AsapSCIENCE explains how, as far as the current technology indicates. Biomedical engineering can do amazing things, such giving disabled people workarounds to make their lives more like those who have fully-functioning bodies. The example given is the cochlear implant to restore hearing. It’s a miracle in itself, but new technology aims to make it even better.
But there is a downside. You’ve heard it said that any technology that can be used for evil will eventually be used for evil. If we can make a deaf person hear or a mouse run around in circles by implanting things in the brain, couldn’t humans eventually manipulate each other on a large scale?