A recent study, “Hippocampal GABA enables inhibitory control over unwanted thoughts (Schmitz, Correia 2017),” has shown a link between the prefrontal cortex and the hippocampus in inhibiting unwanted thoughts. Previously thought to be the sole work of the prefrontal cortex, researchers have found that an overactive hippocampus can derail the brains ability to suppress unwanted thoughts. If this hypothesis is supported, it can mean a complete change in the way we treat mental health issues like PTSD, schizophrenia, depression and anxiety disorders.