Q: What did you find?
Lazar: We found differences in brain volume after eight weeks in five different regions in the brains of the two groups. In the group that learned meditation, we found thickening in four regions:
1. The primary difference, we found in the posterior cingulate, which is involved in mind wandering, and self relevance.
2. The left hippocampus, which assists in learning, cognition, memory and emotional regulation.
3. The temporo-parietal junction, or TPJ, which is associated with perspective taking, empathy and compassion.
4. An area of the brain stem called the Pons, where a lot of regulatory neurotransmitters are produced.
The amygdala, the fight or flight part of the brain which is important for anxiety, fear and stress in general. That area got smaller in the group that went through the mindfulness-based stress reduction program.
The change in the amygdala was also correlated to a reduction in stress levels.
Q: So how long does someone have to meditate before they begin to see changes in their brain?
Lazar: Our data shows changes in the brain after just eight weeks.
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