Meditation training may enhance stress resilience via hippocampal structure alterations. This notion comes from the idea that hippocampal atrophy is associated with clinical disorders that involve stress, anxiety, and depression. These clinical disorders may also be associated with problems of concentration and memory. Thus, structural increase in the hippocampus relate to meditation's potential betterment of these clinical conditions. There may also be structural differences in the hippocampus because of memory reconsolidation. Many meditative practices place a strong emphasis on re-evaluating past behavioral patterns and default emotional reactions to events. The differences in the hippocampus may be due to the region playing a role in seeing past experiences in a new light and allowing for greater flexibility in present behavior. Structural differences in the hippocampus may be related to the effort involved in re-contextualizing spontaneous thought processes, memories, and simulations during meditation practice.