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These days, most of us have at least a passing familiarity with the idea of meditation.

Whether it's something you've seen portrayed on TV, something you have a casual go at to cap off an occasional yoga practice,

or it's an integral part of your daily routine.

The idea of using mindfulness and breathwork to cope with physical and mental stressors

has arguably gone pretty mainstream.

For Scientific Americans, science quickly, I'm Rachel Feldman.

Speaking personally, I'm by no means an expert at meditation, but I have used it regularly

ever since my martial arts instructor forced me to learn when I was eight. So thanks to Mr.

Rortoli and Grandmaster Yee. But today, I'm talking to someone who goes way deeper in meditation

than just doing some square breathing on a gymnasium floor.

Now he's using neuroscience to help fellow researchers and spiritual practitioners alike

get a better understanding of what happens to the brain during these exercises.

Joining us today is Matthew Sackett, Associate Professor and Director of the Meditation Research Program at Harvard

Medical School and Mass General Hospital.

I would love to start with hearing just a little bit more about what you mean when you talk

about advanced meditation. How is it different from the sort of mindfulness

meditation that our listeners might be familiar with? The way that we use advanced meditation

...