A recent study published in Behavioral Neuroscience offers new insights into the relationship between brain structure and posttraumatic stress disorder (PTSD). The study found that smaller volumes in specific regions of the hippocampus, a brain structure involved in memory and learning, are associated with reduced PTSD symptom severity over time. This counterintuitive finding suggests a complex relationship between hippocampal structure and PTSD symptoms, particularly in how these brain regions may influence symptom improvement. PTSD is a mental health condition that can develop after experien…