How Meditation Reshapes Your Brain

"Sharon Gannon, the co-founder of Jivamukti Yoga, the largest yoga center in the U.S., tells Big Think that meditation is all about ignoring stimuli. "We're so habituated to reacting to every stimulus," she says. If the phone rings, we answer it; if someone knocks at the door, we open it. But meditation is a space where we don't react to the stimuli that constantly bombard us; it is about letting go, and it paradoxically makes us better able to engage. "Without taking the time every day to let things come and let things go without acting upon it, you won't have clarity of mind," she says.

New neurobiological research bolsters the idea that meditation effects a permanent restructuring of the brain. In 2008 a team of researchers from UCLA led by Eileen Luders compared the brains of long-term meditators with those of control subjects. In the brains of the meditators, they found larger volumes of gray matter in the right orbito-frontal cortex and the right hippocampus, areas thought to be implicated in emotion and response control. "It is likely that the observed larger hippocampal volumes may account for meditators' singular abilities and habits to cultivate positive emotions, retain emotional stability, and engage in mindful behavior," Luders writes. They also discovered a marked increase of gray matter in the thalamus, which is thought to act as the brain's switchboard, relaying information between the cerebral cortex and subcortical areas. The change in size might allow for the meditators' enhanced sense of focus during their practice.

Far from being simply a relaxed state, meditation is a period of heightened activity in the brain—one that can actually reshape your brain. People as diverse as David Lynch and the Dalai Lama have touted the benefits of meditation, claiming that it can increase attention, combat stress, foster compassion, and boost health. And in the past two decades, neuroscientists have begun to understand the biological substrates of these claims. Research suggests that long-term meditation increases the orbitofrontal cortex, the hippocampus, and the thalamus, potentially increasing one's capacity for attention as well as compassion. 
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"It takes you to an ocean of pure consciousness, pure knowingness. But it's familiar; it's you. And right away a sense of happiness emerges—not a goofball happiness, but a thick beauty."