Surjo explores how neurotechnologies can be used in the treatment of neurological and psychiatric diseases. Neurotechnologies are technical and computer-aided tools that analyse brain signals or are able to change brain activity in a targeted way. His research to date has enabled paraplegics, for example, to eat and drink independently using a brain-controlled hand exoskeleton. Surjo and his team are currently developing the next generation of brain-machine interfaces that combine real-time analysis of brain states with non-invasive brain stimulation.