Additionally, recent research has reported actual physical and structural changes in the brain with long term practice of meditation. Benefits of mindfulness meditation appear to have a neuroplastic effect on the brain. Studies among those practicing meditation have demonstrated a change in the mass of grey matter as well as an increase in brain connectivity . The structural changes in the brain include an increased density of grey matter in the hippocampus, which is a region involved in the process of learning and memory. In addition, a decrease in density in the amygdala was noted; this region plays a role in stress and anxiety.