Re- Educating the Mind

Yoga and the Autonomic Nervous system:

Re- Educating the Mind

Sandra Uyterhoevenjake

In Yoga, we can practice repetition to change deeply embedded physical, psychological, or emotional patterns.

This article will first present a brief overview of the autonomic

nervous system (ANS). With a basic understanding of how

the ANS works, we can then consider how Yoga practices that

influence the ANS can help us re-educate the mind.

Function of the ANS

The ANS controls involuntary functions of the body, operating

for the most part well below the level of consciousness. It differs in these respects from the somatic nervous system, which controls voluntary bodily functions, is consciously perceived, and is therefore easier to influence. The parts of the body influenced by the ANS are cardiac muscle, smooth muscle, and glandular tissue. Smooth muscles of the ANS include lungs, liver, large and small intestines, reproductive organs, and elimination systems, to name a few. Glandular tissue includes two types of glands: endocrine, which are hormone producing glands such as the adrenals, thyroid, pituitary; and exocrine, which are sweat glands, oil producing glands of the skin, and digestive glands such as the gall bladder, pancreas, and others.

Two Divisions of the ANS

The ANS has two divisions: the sympathetic nervous system and the parasympathetic nervous system. The sympathetic nervous system is a system for short-term survival. It excites the body, preparing it for action. Any signal of danger or disturbance—real or perceived—can set in motion a process known as the stress response. The SNS alerts your heart rate, blood pressure, clotting mechanisms, blood sugar level, respiration, and voluntary muscles to prepare for action. At the same time, it signals your digestive and elimination systems, sensitivity to pain, and other systems not needed for self-defence to slow or shut down. The effects of the SNS are immediate, widespread, and long-lasting. In contrast, the parasympathetic nervous system is a system

of long-term survival. It promotes rest and regeneration. The acronym SLUDD succinctly summarizes the functions of the PNS: salivation, lacrimation, urination, defecation, and digestion. In addition, this system redirects blood flow back to the core of the body. The PNS system is characteristically slower to take effect than the SNS, and its effects are less widespread. In this system of dual innervations, most organs receive nerve impulses from both the sympathetic and parasympathetic nervous systems. While the two divisions are activated under different circumstances, both are vital to our survival and well-being.

The Stress Response

The stress response, which is characterized by sympathetic activation, occurs in three stages: an initial fight-or-flight response, which mobilizes the body for immediate action, a slower resistance reaction, and possibly a stage of exhaustion. When a stressor provokes the fight-or-flight response, the hypothalamus and pituitary gland send nerve impulses from the brain to the sympathetic division of the ANS. The impulses redirect energy to the muscles and organs needed for immediate survival in an emergency, and away from those not needed for immediate survival. For example, the digestive, reproductive, and urinary systems become impaired or shut down.

The second stage, the resistance reaction, is initiated by hypothalamic releasing hormones, which stimulate the release of cortisol, human growth hormone, and thyroid hormone. By producing increased energy, and by helping the body repair damaged cells and reduce inflammation, these hormones enable the body to continue to fight the stressor after the initial response dissipates.

Most of the time, these two stages suffice to get the body through stressful situations. Sometimes they do not, and the body moves into the exhaustion stage, in which it continues to produce large amounts of stress hormones. Prolonged exposure to these hormones, particularly cortisol, can have devastating effects.

In our daily lives, we encounter many internal and external stressors, and if we fail to discharge our response to stress through physical activity (such as the well-known “fight” of our ancestors, or more enjoyable activities today), we may become chronically stressed. A sustained high level of cortisol destroys healthy muscles, bones, and cells, suppresses the immune system, impairs digestion, and weakens endocrine function. The destructive effects of chronic stress put people at greater risk of chronic disease and premature death.

While the stress response is extremely useful as a survival mechanism, it is equally detrimental if invoked when not needed for survival, or chronically invoked. Therefore, it is vitally important that we activate the SNS only when there is real danger, or a need for physical activity, when we can discharge its effects through appropriate action.

Through conditioning and repeated practice, we have learned to invoke the stress response on inappropriate occasions. Why not use the same techniques of conditioning and practice to reverse this behaviour?

International Association of Yoga Therapists

Can Yoga Change Our Relationship to the ANS?

It is widely recognized that most of what activates the fight-or flight response is in reality not a matter of life and death. When the source of stress is psychological rather than physical danger, there is the opportunity to change the habitual pattern that triggers the sympathetic nervous system. In particular, Yoga techniques offer the possibility of reducing inappropriate activation of the sympathetic nervous system.

The calming effects of savasana, Yoga nidra, and pranayama have been widely studied and reported. The effects of these practices provide a great service to many Yoga aspirants by giving them a short-term “time out” from stress, and also by creating positive physiological changes in bodily systems (including the nervous system).

For example, deep breathing activates the parasympathetic nervous system, possibly because regular movement of the diaphragm stimulates the vagus nerve.

These practices can induce the relaxation response, which provides a healthy respite from chronic stress.

While these techniques are valuable, they may only calm us temporarily. If underlying patterns in our psyches continue to trigger the fight-or-flight response inappropriately, we end up simply repeating the same old patterns. Such patterns are often deep, long-standing, and subconscious. Unless we choose to change them and develop tools to do so, the fallback position is to repeat and reinforce the patterns, making already strong tendencies ever stronger.

In Yoga, we can practice repetition to change deeply embedded physical, psychological, or emotional patterns. We can use repetition in meditation to observe and understand our behaviour patterns, and then create new ones. Imagine the profound and lasting effects that could result from changing these deeper patterns that affect the way we view ourselves, others, and the world!

The Change Process

A good way to increase our understanding of our behaviour patterns is through meditation on the patterns themselves (Sutra III.18). In Sutra III.9, Patanjali describes what is often referred to today as cognitive reframing. In the language of the Yoga Sutras, this term equates to reprogramming our individual chitta (mind or energy field) as part of the process of transformation.

How does this work?

Through our thoughts and our actions, we are continually recording patterns on chitta. Patanjali shows us that we have the choice of reinforcing old patterns and, thus, repeating the same behaviours, or creating new patterns and changing our behaviour. By choosing to focus the mind, we can end the distractions that cause the mind to be agitated.

An agitated state of mind calls up unconscious tendencies associated with the stress response, while a focused mind evokes patterns associated with the parasympathetic, rest and regeneration response.

Each time we consciously focus the mind, ending a vritti (disturbance), we are reprogramming our individual chitta. Patanjali calls this process nirodha parinama. When we do this continually, a new pattern emerges, the old pattern recedes, and we experience the calm flow of transformation described in Sutra III.10. Because transformation is a journey inward, the old pattern being replaced is called the (externalization) samskara.

Researchers studying the effects of meditation have found changes in both brain activation and emotion experience. Is this process of change, described by Patanjali, the process that contemporary researchers are measuring?

Meditation

Dhyana meditation, described in Patanjali’s Yoga Sutras, is

a powerful tool for managing stress. By definition, dhyana

Meditation and Change in the Brain Richard J. Davidson, PhD, Director of the Laboratory for Affective Neuroscience at the University of Wisconsin, and other researchers conducted a randomized controlled study to determine the effects of an eight-week training program in mindfulness meditation on the brain.

Brain electrical activity was measured in a group of 25 participants before the eight-week training, at the end of the training, and four months later. A control group of 16 non-mediators was also tested. The study reported significant increases after eight weeks in left-sided frontal activation in the brains of the mediators, as compared with the control group. The left side of the frontal cortex is associated with positive feelings such as joy, happiness, compassion, and lower levels of anxiety. After 16 weeks, the shift in brain activity remained.

There was also a significant reduction in self-reported experience of anxiety among the mediators after the eight week training, and this state of reduced anxiety persisted four months later. There was no change in anxiety level for the control group. These results (increased positive feelings and decreased negative feelings) would likely correlate with less

frequent activation of the sympathetic nervous system’s stress response. This study is a good example of how the process

of repetition in meditation practice can create meaningful

change.

Source: Davidson, R. J., Kabat-Zinn, J., Schumacher, J.,

Rosenkranz, M., Muller, D., Santorelli, S.F., Urbanowski,

F., Harrington, A., Bunus, K., and Sheridan, J.F. (2003).

Psychosomatic Medicine, 65, 564-570.

August 2006 Yoga Therapy in Practice - meditation requires one to focus attention in a sustained way on an object such as the breath, a word with positive connotations (for example, the word “contentment”) or another mantra or object.

In Chapter III, Patanjali offers numerous examples of objects of meditation, along with expected results. By practicing dhyana meditation consistently, we become imbued with the quality upon which we are meditating, and we change. With repeated meditation, the quality grows stronger in us, until the object of meditation becomes our reality.

To experience this phenomenon, try meditating on the strength of an elephant (Yoga Sutra, Patanjali, III.24) and notice how strong you feel, after even a short meditation. This idea of taking on the quality of your object of focus helps to explain why sangha—the company we keep—is such a strong influence on our character.

How does this relate to the autonomic nervous system?

By turning our attention (through meditation, visualization, or sangha) to positive qualities, the positive qualities become dominant and our negative qualities become weakened or dormant. Negative reactions (fear, anger, anxiety, and resentment) that trigger the sympathetic nervous system inappropriately are less likely to occur. There seems to be a Sutra for every life situation, and this one is no exception, (Yoga Sutra, Patanjali, I.50). This newly acquired quality born of insight eclipses or dominates the other tendencies.

Substituting The Opposite

Patanjali explains the concept of, which means to substitute the opposite, or, when something is causing you to feel troubled, to take a different perspective. This practice, too, requires awareness, self-observation, and repetition, replacing the anger with love, will never be completely get rid of the anger, but as the love grows, the anger will subside.

Persistence with Detachment

Patanjali advocated repetition constant practice, and to that he added “detachment from the results” (Yoga Sutra I.12). It’s easy to imagine why Patanjali added the piece about detachment. He probably realized we would defeat our purpose by applying anxiety-producing patterns (“Am I doing this right?” or “How soon will I achieve this goal?”) that could undermine the process. By practicing these techniques over and over again without concern about results, the results do come, usually when you are least expecting them. There is a Yoga saying, “Do every day and you become that.” And that’s how repetition works: one day you realize you have become a different person. The practices have taken hold, they have changed you, and you find that your mind and body’s autonomic responses are one more example of skill in action.