Brain Electrical Activity

Improve Your Stress Responses with Mindful Awareness

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“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?”

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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

 

Meditate Effortlessly with Practice.

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“Watch your thoughts as you watch the street traffic. People come and go; you register without response. It may not be easy in the beginning, but with some practice you will find that your mind can function on many levels at the same time and you can be aware of them all.” – Nisargadatta Maharaj

 

When a meditation practice is first begun, this simple activity can seem devilishly difficult; requiring a great deal of effort to be expended to maintain focus. Yet the effort doesn’t seem to make it any easier. Rather, it seems to get more and more difficult to keep the mind from wandering away. This is an important lesson unto itself. It becomes clear that the mind is not under the control that was imagined. In fact, the mind appears to be an unruly beast that is extraordinarily difficult to tame. That is why many teachers refer to it as the monkey mind. This revelation is often startling to the beginner and is itself a great insight.

 

Over time, however, without really understanding how, meditation gets more and more focused with less and less effort. That’s not to say that the mind doesn’t wander, it does and frequently. But, it does so less often for shorter periods of time and the mind wandering doesn’t evoke the same anger and frustration that it used to. The whole process becomes much more relaxing. The focus of meditation doesn’t seem to require the level of effort that it once did. Relaxed enjoyment of just being becomes more frequent and enduring as the meditator stops fighting the mind and instead becomes an awake detached observer.

 

What changes with practice? How does meditation become so much easier and relaxed? One possibility is that as practice develops, it changes the brain. Indeed, contemplative practice is known to produce alterations in the structure, connectivity, and activity of brain areas (see http://contemplative-studies.org/wp/index.php/category/research-news/neuroplasticity/ and http://contemplative-studies.org/wp/index.php/category/research-news/brain-electrical-activity/). These changes occur in a number of neural areas and systems. But, the changes frequently involve the frontal lobes (see http://contemplative-studies.org/wp/?s=frontal). This is particularly important as the frontal lobes are thought to be very important for high level cognitive processes sometimes labelled as executive function. Among these frontal lobe functions is attentional ability. It is important to focusing and maintaining attention.

 

In today’s Research News article “Effortless Attention as a Biomarker for Experienced Mindfulness Practitioners”

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4601770/

Tanaka and colleagues investigated the electrical activity of the frontal lobes during a 40 minute session of open monitoring meditation (see http://contemplative-studies.org/wp/index.php/2015/07/25/beginning-meditation-getting-started-4-open-monitoring-meditation/). They recorded Beta band frequencies (13-30 hertz) of frontal EEG activity and compared it between first time meditators and long-term experienced meditators with over 5 years of consistent meditation practice. The Beta band was selected as it has been shown to be associated with attention, vigilance and processing information.

 

The power of Beta band activity did not differ between groups during the rest period prior to meditation. During meditation Beta band power was significantly higher for the first time meditators than the experienced meditators. Since increased power in the Beta band is associated with attention, the observations suggest that the first time meditators are investing more effort into maintaining attention while the experienced meditators are using minimal effort to maintain attention. These results are in line with what is reported to occur in long-term meditators with maintaining attention described as effortless. These results also suggest the possibility that changes in the frontal lobe may underlie the effortless effort of experienced meditators.

 

So, regularly practice meditation letting it become effortless.

 

“In the beginning you will fall into the gaps in between thoughts – after practicing for years, you become the gap”. – J. Kleykamp

 

CMCS – Center for Mindfulness and Contemplative Studies

 

Improve Mental and Physical Well-being with Yoga

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Yoga cognition Nagendra2

“The breathing and meditative exercises aim at calming the mind and body and keeping distracting thoughts away while you focus on your body, posture or breath. Maybe these processes translate beyond yoga practice when you try to perform mental tasks or day-to-day activities.” – Neha Gothe

 

If we are lucky enough to navigate life’s dangers we are rewarded with the opportunity to experience aging! The aging process involves a progressive deterioration of the body including the brain. It actually begins in the late 20s and continues throughout the lifespan. It’s inevitable. We can’t stop it or reverse it. But, it is becoming more apparent that life-style changes can slow down and to some extent counteract the process and allow us to live longer and healthier lives. This is true for both physical and mental deterioration including degeneration and shrinkage of the nervous system. Aging healthily to a large extent involves strategies to slow down the deterioration.

 

Contemplative practices including yoga practice (See links below) have been shown to reduce the physical deterioration that occurs with aging (see http://contemplative-studies.org/wp/index.php/category/research-news/aging/). Yoga practice has many physical and mental benefits including protection of brain structures from degeneration with aging (see http://contemplative-studies.org/wp/index.php/2015/07/17/age-healthily-protect-the-brain-with-yoga/). These structural changes have been demonstrated by neuroimaging techniques with yoga practitioners. They document change in the size and connectivity of brain structures that result from yoga practice.

 

Yoga is a mind-body practice that involves both physical and mental exercises. This is accompanied by changes in the activity of virtually every component of the body including general physiology and the peripheral and central nervous systems. So, another potential method to investigate yoga’s effects on the nervous system is to measure the electrical signals emanating from the nervous system.

 

In today’s Research News article “Cognitive Behavior Evaluation Based on Physiological Parameters among Young Healthy Subjects with Yoga as Intervention”

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4339827/

Nagendra and colleagues trained naive adults in yoga practice for a period of five months for 1.5 hours per day and compared physiological measure to a no-treatment control group. They found that yoga practice produced an increase in parasympathetic (vegetative) and decrease in sympathetic (activation) activity in the peripheral nervous system including a decrease in heart rate and heart rate variability. This indicates a calming and relaxing effect of yoga on the physiology.

 

Nagendra and colleagues also found significant differences in EEG activity of the central nervous system. The changes were complex and varied. But they are indicators that yoga practice produces alterations of brain activity in ways that are indicative of improved vigilance, alertness, attention, concentration ,memory, visual information processing, sense of wellbeing, responsiveness, emotion process, cognition, and executive function and reduced stress and strain. In other words the changes in the brain activity indicated vast improvements in mental processing produced by yoga practice.

 

It should be noted that these are indirect measures and the researchers did not directly measure the psychological variables. So, although suggestive they are not conclusive. They are, however, similar to findings of yoga effects in other research with direct measures (see http://contemplative-studies.org/wp/index.php/category/contemplative-practice/yoga-contemplative-practice/). But, even with this caution, the results suggest that yoga practice has widespread beneficial effects on the mental and physical well-being of the individual.

 

So, practice yoga and improve mental and physical well-being.

 

“True yoga is not about the shape of your body, but the shape of your life. Yoga is not to be performed; yoga is to be lived. Yoga doesn’t care about what you have been; yoga cares about the person you are becoming. Yoga is designed for a vast and profound purpose, and for it to be truly called yoga, its essence must be embodied.” — Aadil Palkhivala

 

CMCS – Center for Mindfulness and Contemplative Studies

 

 

Yoga and aging links

Yoga reduces physical degeneration in the elderly http://contemplative-studies.org/wp/index.php/2015/07/17/age-healthily-yoga/

Yoga reduces cellular aging http://contemplative-studies.org/wp/index.php/2015/07/17/aging-healthily-yoga-and-cellular-aging/

Yoga practice improves the symptoms of arthritis in the elderly http://contemplative-studies.org/wp/index.php/2015/08/14/age-healthily-yoga-for-arthritis/

 

 

Change Your Brain for Better Health with Yoga

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“The autonomic nervous system is divided into the sympathetic system, which is often identified with the fight-or-flight response, and the parasympathetic, which is identified with what’s been called the relaxation response. When you do yoga – the deep breathing, the stretching, the movements that release muscle tension, the relaxed focus on being present in your body – you initiate a process that turns the fight or flight system off and the relaxation response on. That has a dramatic effect on the body. The heartbeat slows, respiration decreases, blood pressure decreases. The body seizes this chance to turn on the healing mechanisms.” – Richard Faulds

 

The practice of yoga has many benefits for the individual’s physical and psychological health. Yoga has diverse effects because it is itself diverse having components of exercise, mindfulness meditation, and spirituality. So, yoga nourishes the body, mind, and spirit. As a result, yoga practice would be expected to produce physical changes. These include the relaxation response and stress relief as suggested in the above quote. These should be obvious in the muscles, tendons and joints, but, less obvious in the nervous system.

 

The nervous system changes in response to how it is used and how it is stimulated in a process called neuroplasticity. Highly used areas grow in size and connectivity. Mindfulness practices in general are known to produce these kinds of changes in the structure and activity of the brain (see http://contemplative-studies.org/wp/index.php/2015/08/01/this-is-your-brain-on-meditation/). Indeed, yoga practice has been shown to protect the brain from age related degeneration (see http://contemplative-studies.org/wp/index.php/2015/07/17/age-healthily-protect-the-brain-with-yoga/).

 

In today’s Research News article “Effects of yoga on brain waves and structural activation: A review.”

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Desai and colleagues review the literature on the effects of yoga practice on the structure and activity of the nervous system. They found that the published evidence indicates that there is an overall increase in brain wave activity. This increased nervous system activity may explain the decreases in anxiety and increases in focus that are evident after yoga training programs.

 

They also found that there were reported changes in brain structure. There were reported increases in the gray matter volume overall and also increases in volume of specific areas. There was reported to be increased gray matter in the insula which may explain decreased pain perception with yoga. There was reported to be an increase of hippocampal volume which is associated with spatial ability and memory. In addition, increases in amygdala and frontal cortex activation were evident after a yoga intervention. This was suggested to be associated with improved emotion regulation.

 

Regardless of the specific structure-function relationships, it’s clear that yoga practice alters the brain, increasing overall activity and increasing the volume of gray matter in areas of the brain that underlie emotion regulation, memory, spatial ability, pain, and attentional mechanisms.

 

So, practice yoga and change your brain for better physical and psychological health.

 

“The beauty is that people often come here for the stretch, and leave with a lot more.” – Liza Ciano

 

CMCS – Center for Mindfulness and Contemplative Studies

 

Make the Brain more Efficient with Meditation

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Meditation has been shown to alter the nervous system. It changes the size of brain areas, their connectivity, and their activity. It even appears to protect the brain from the degeneration that normally occurs with aging. These changes are thought to underlie meditation effects on physical and psychological health. These effects of meditation were reviewed in a previous post

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http://contemplative-studies.org/wp/index.php/2015/08/01/this-is-your-brain-on-meditation/

The increased connectivity between brain areas implies that meditation may make the nervous system more efficient, processing information faster and more effectively. But, the prior studies do not directly measure information processing efficiency. In today’s Research News article “Neurophysiological Effects of Meditation Based on Evoked and Event Related Potential Recordings”

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http://www.hindawi.com/journals/bmri/2015/406261/

Singh and colleagues review studies that have used the electrical signals from the brain to track how fast and effectively sensory information is processed in the brain during meditation. They report that the research indicates that indeed the brain processes this information more efficiently while engaged in meditation.

There were two different types of improvements reported with meditation. The first is simple processing on sensory events, sending the signals from the sensory organs to the cortex where complex processing occurs. They found that this simple level processing was improved during meditation.

The second type of processing is more complex and involves making decisions about the sensory information. This type of processing was also found to be improved in meditators. There was improved attention and switching of attention, greater perceptual clarity, lower automatic reactivity to the information and its emotional content, greater emotional acceptance, and lower anticipation and fear of pain. These results are remarkable and suggest that meditation increases the efficiency of the brain, improving the distribution of limited brain resources.

How can such a simple practice such as meditation have such profound effects upon the nervous system. In meditation, information processing is greatly simplified and focused. By reducing intrusions and the onslaught of complex sensory experiences, thoughts, implicit speech, and ruminations, meditation may allow the brain to focus on a reduced number of tasks and thus learn to process them simply and more efficiently.

It is also the case that the nervous system adapts to the kind of processing that it’s asked to do in a process called neuroplasticity. By reducing the complexity of processing the brain may improve and allocate its resources to focused tasks, improving its speed and effectiveness in processing them. Simply put, by making the world simpler, with fewer distraction or discursions the nervous system can better learn how to effectively make sense of what’s present.

So, meditate and make the brain better.

CMCS – Center for Mindfulness and Contemplative Studies