OXT and post-traumatic stress disorder: Furthermore, oxytocin—a neuropeptide with widespread targets including the amygdala and hippocampus and important for facilitating attachment in mammals (Meyer-Lindenburg, Domes, Kirsch, & Heinrichs, 2011)—has been found to impact on a variety of the behavioural, neural, and neuroendocrine dysregulations observed in PTSD (Olff, 2012).