Psychedelics like LSD have received a lot of buzz for their potential to treat serious mental health issues like post-traumatic stress disorder (PTSD). But how do these psychedelics impact the brain? Research suggests LSD can partially activate serotonin receptors, sending signals through systems usually shaped by serotonin — altering everything from mood and attention to sensations and sleep cycles. But more research is needed to determine a more well-rounded understanding of LSD’s biological impacts and efficacy as a medical treatment. This is a video from the 2023 Brain Awareness Video Contest. Created by Katelyn Caldarone.