Dr. Mitra Afshari chats with Dr. Jung Hawn Shin, one of this year’s MDS Congress Junior Awardees. Together they discuss his career path and what lead him to studying, and ultimately deciphering specific neuronal cell-types within the subthalamic nucleus (STN) that could be responsible for anti-parkinsonian motor benefits, and potentially non-motor side effects, of stimulation using optogenetic technology in Parkinsonian mice.