Yoga may bolster the brain regions most affected by aging
Yoga is deeply linked to traditional Eastern medicine and a view of the body as a system of energy channels and nexuses—a perspective that does not easily align with Western medicine. But since the start of this century, scientific research on yoga has exploded. Many recent studies assess yoga as a “complementary therapy” to be used alongside other treatments for problems such as back pain, depression, anxiety and arthritis. Such research often has found that the practice can help. Still, yoga studies tend to be of uneven quality, often relying on self-reported survey data. Research shows that three patterns emerged with some consistency: yoga practice could be linked to increased gray matter volume in the hippocampus, a key structure for memory; increased volume in certain regions of the prefrontal cortex, the seat of higher-order cognition; and greater connectivity across the default mode network. This network plays a role in processing memories and emotions and “what we call self-referential processing—processing information about yourself,” explains Jessica Damoiseaux, a cognitive neuroscientist at Wayne State University and co-author of the review paper. The significance of having more gray matter volume in these regions is not entirely clear, she says, but “it suggests there may be more connections between neurons, which can indicate better functioning.”