doctor kathryn. it s good to see you. what an amazing breakthrough. just tell us exactly how it works. well, depression is incredibly common and there is a substantial number of people who remain resistant. and there is growing acceptance that if depression is caused by faulty function, the relationship between each individual patient s depression isn t well known. we believe that we can use the brain stimulation, which is a common treatment that has been used previously to restore healthy function to these neural circuits in depression. so we set out to discover whether we could do this. to identify a patient s depression circus, we put electros across the circuit tory. we then delivered small pulses of stimulation and ask