Meditation helps increase gray matter. A research team from University of California, Los Angeles scanned the brains of people who meditate and found that certain regions in the brains of long-term meditators were larger than in a similar control group.

Meditators showed significantly larger volumes of the hippocampus and areas within the orbito-frontal cortex, the thalamus and the inferior temporal gyrus - all known for regulating emotions.

During the study, the research team looked at 44 people. Half were asked to practice various forms of meditation such as Zazen, Samatha and Vipassana and the other half acted as the control group.

More than half of all the meditators said that deep concentration was an essential part of their practice, and most meditated between 10 and 90 minutes every day.

The brains of the meditators showed larger volumes of the right hippocampus and increased gray matter in the right orbito-frontal cortex, the right thalamus and the left inferior temporal lobe. Because these areas of the brain are closely linked to emotion.