“Researchers estimate that stress contributes to as many as 80 percent of all major illnesses, including cardiovascular disease, cancer, endocrine and metabolic disease, skin disorders, and infectious ailments of all kinds.” – Prescription for Nutritional Healing 4th edition
The mind and body are intimately connected and can never be completely separated. This can be witnessed in how the brain and the hormonal systems interact. The stress response is a case in point. Difficult, challenging, outside situations affect the mind which responds by producing psychological and physiological stress responses. These include the release of stress hormones such as cortisol. This prepares the body to fight off the potentially damaging stressors. This is normally a good thing, but if it persists over a prolonged period the stress response itself becomes damaging and a source of disease. Hence, it is important to not block the stress response but to insure that it doesn’t become a chronic condition.
The stress hormones including cortisol not only affect the peripheral physiology, they also affect the brain. The hippocampus and prefrontal cortex are particularly sensitive to cortisol. These are also sites that are affected by meditation (see http://contemplative-studies.org/wp/index.php/2015/08/01/this-is-your-brain-on-meditation/). In addition, it has been shown that meditation reduces the psychological and physiological responses to stress (see http://contemplative-studies.org/wp/index.php/category/research-news/stress/). So, it is possible that meditation has its effects on stress responses in part by altering the brain structures that respond to stress hormones, that it changes the brains response to stress hormones.
In today’s Research News article “Can the neural–cortisol association be moderated by experience-induced changes in awareness?”
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4649618/
Lau and colleagues separated meditation naïve adults into two groups, an awareness-based compassion meditation (ABCM) group and a relaxation group. The groups practiced for six weeks for comparable amounts of time. Following practice, they found that the meditation produced a significant increase in mindfulness while the relaxation actually reduced mindfulness. These changes in mindfulness were significantly related to cortisol levels with high mindfulness associated with low cortisol. In addition, they found that both increases in mindfulness and decreases in plasma cortisol levels were associated with increases in the synchronization of spontaneous brain activities of the Hippocampus. In other words, mindfulness moderates the ability of cortisol to affect the hippocampus. Hence, meditation increased mindfulness that in turn decreased both blood levels of the stress hormone cortisol and the ability of cortisol to affect brain function.
These results demonstrate that mindfulness affects the stress response, with higher mindfulness associated with lower levels of stress hormones. But, they also demonstrate another effect of mindfulness on the stress system. High mindfulness was associated with a greater effect of cortisol on the activity of the hippocampus. These results then demonstrate that mindfulness has a direct effect of reducing stress hormone levels and also indirect effects by affecting the influence of the stress hormones on the brain. This is a clear case of mind-body interaction.
The findings of Lau and colleagues demonstrate two physiological mechanisms through which mindfulness practice has powerful effects on reducing psychological and physiological responses to stress. These results further support the use of mindfulness practice to improve stress responding and thereby improve health and well-being. These effects of mindfulness on stress may be a major reason why mindfulness training is so beneficial to a wide array of health conditions.
So, improve your stress responses with mindful awareness.
“Cortisol could be described as “Miss Misunderstood” of hormones. Elevated levels of cortisol is not always bad. Low levels of cortisol is not bad either. Cortisol is there for a reason. The body uses cortisol to deal with stress and pain and it fluctuates according to the body’s demand. The problem arises when the stress is not dealt with for an extended period of time and as a result the body’s stress adaption mechanism breaks down and cortisol levels go crazy. In order to prevent such a fate, stress reduction could definitely offer significant help.” – YawnCentral
CMCS – Center for Mindfulness and Contemplative Studies