Internal connections Archives - Internal Tai Chi Chuan of NY

What does the Cerebellum Do Anyway?

Brain, cerebellum, and sample neurons of the cerebellum

What does the Cerebellum Do Anyway?.
by Sarah Constantin, December 28, 2023
Thanks to Paul Wirth of mosaicbodywork.com, who suggested this article

This [above] is the cerebellum. Its name means “little brain”—it’s a whole other brain under your “big” one.

If you vaguely remember something about what the cerebellum does, you’re probably thinking something to do with balance. Medical students have to learn the “cerebellar gait” that results from cerebellar injury (it’s the same staggering gait that drunk people have, because alcohol impairs the cerebellum.)

A more detailed neurological exam of a patient with cerebellar disease shows a wider variety of motor problems.

Here you’ll notice that the patient can’t bring his finger to his nose or clap his hands without a wobbling back-and-forth motion; that his eyes “wobble” back and forth (which is called nystagmus); and that he wobbles backwards and forwards while standing or walking, so that he nearly falls over and needs a broad-based gait to support himself.

In cerebellar disease, muscle tone is diminished (people are “floppy”), movements are not fluent (each individual sub-movement is separate), there’s dysmetria (failure to “aim” or estimate the distance to move, overshoot or undershoot) and there’s “intention tremor” (high amplitude, relatively slow wobbles that arise when the patient starts to move, as contrasted with the “resting tremor” characteristic of e.g. Parkinson’s disease.)

Clearly, the cerebellum does something to control movement, and movement is impaired when it is damaged. But why do we need a whole other “little brain” to control these aspects of movement?

There are already regions of the cerebrum (or “forebrain”) dedicated to movement, like the motor cortex and the basal ganglia. And you can do a lot of movement using just those!

Even in the rare cases known as cerebellar agenesis, where a person is born totally lacking a cerebellum, movement is still possible, just impaired: slow motor and speech development in childhood, abnormal spoken pronunciation, wobbly limb movements, and mild-to-moderate intellectual disability. But not paralysis, and not even particularly bad disability overall — a lot of these people were able to live independently and work at jobs.

So…that’s weird.

What is the cerebellum’s job? It seems weird to have a whole separate organ for “make motor and cognitive skills work somewhat better.”

The other weird thing about the cerebellum is anatomical.

These very large, complex neurons are the Purkinje cells, which exist only in the cerebellum.

Brain, Toes, and Fingers: Clues About How They Connect

Baby holding feet, curling toes and fingers

Brain, Toes, and Fingers: Clues About How They Connect

Highlights [bolding below is by editor here]

There are systematic but distinct patterns of confusion between fingers and toes.
Idiosyncrasies in patterns of tactile confusion are shared between fingers and toes.
Tactile confusions likely arise from high-level representations of the body.
Shared confusions may be a result of a common representation of fingers and toes.

Note by editor: important for us as Tai Chi Chuan practitioners is that there are innate connections between toes and fingers. The article is also studying pathology (“confusion”) between toes and fingers, but for us, the natural brain connection of toes and fingers is information that is more essential, and points to a fundamental of Tai Chi Chuan practice for most effective movement integrating brain and body.

Abstract

There are many similarities and differences between the human hands and feet. On a psychological level, there is some evidence from clinical disorders and studies of tactile localisation in healthy adults for deep functional connections between the hands and feet.

One form these connections may take is in common high-level mental representations of the hands and feet. Previous studies have shown that there are systematic, but distinct patterns of confusion found between both the fingers and toes. Further, there are clear individual differences between people in the exact patterns of mislocalisations.

Here, we investigated whether these idiosyncratic differences in tactile localisation are shared between the fingers and toes, which may indicate a shared high-level representation. We obtained confusion matrices showing the pattern of mislocalisation on the hairy skin surfaces of both the fingers and toes.

Using a decoding approach, we show that idiosyncratic differences in individuals’ pattern of confusions are shared across the fingers and toes, despite different overall patterns of confusions. These results suggest that there is a common representation of the fingers and toes.

Three Core Principles of Tai Chi Chuan, for an Endless Path of Growth

Practicing Tai Chi Chuan peacefully on the beach

Three Core Principles of Tai Chi Chuan, for an Endless Path of Growth

When practicing Tai Chi Chuan, it can be important to step back at times and revisit: why am I practicing this? and what attitude or understanding will allow me to accomplish the purposes or goals for which I practice Tai Chi Chuan?

As an answer for these questions, I am going to outline three core principles of Tai Chi Chuan. I offer these after 45 years of Tai Chi Chuan practice and teaching, and other meditative and active practices followed for a similar length of time. These core principles, while based on my experience, gain the most value when you the reader can make them your reality (maybe you are already doing so!), rather than only reading the concepts.

The good news is that we arrive at the destination with each step on the path, meaning that even a beginner can create benefits for themselves as they start to concentrate on the essence of Tai Chi Chuan. In a sense, we are always at the beginning moment of our next journey.

So, here are fundamental principles that describe three essential aspects of Tai Chi Chuan practice:

Action originates in the brain, and expresses in the toes and fingers. Every other part of the body stays loose and free in order to fully support the brain’s determination as expressed in our toes’ connection to the Earth and our fingers’ extension through the air. The whole foot supports the action of the toes, and the whole hand supports the action of the fingers.
Fulfilling function of body / brain requires both a deep release, and an awake energizing. With only release, we cannot accomplish our goals and may experience depression. With only energizing, we cannot enjoy the goals we accomplish and may experience anxiety.
The language of the brain is fundamentally frictionless and spacious. When we drop the conflicting mind and its associated tensions, the language of the brain can be perceived by others and by oneself, and we can accomplish and enjoy more with less stress.

I will be writing more about each of these three principles, to clarify how they are part of everyday life for all of us.

With practice, we are on an endless path of growth. May we all share in and enjoy the benefits of this practice.

Brain, toes, and fingers

Homunculus brain map, showing the relative size of body parts in the brain map of each person's body

Brain, Toes, and Fingers

When we practice the movements of the Tai Chi Chuan Short Form, we are always moving as human beings move. We are expressing our human physiology moment by moment and day by day. What changes moment to moment is the quality of our awareness of that reality.

Our mind decides to accomplish a goal, large or small, and tells the brain to initiate movement, to continue the movement, and ultimately to stop the movement. So what is different about our practice of any of the Tai Chi Chuan Forms as compared to other, everyday movements?

The primary differences are that 1) with the Form, our focus is turned inwards, and 2) there is no fixed goal compelling the movements, so the mind is free to “explore”.

In the Form, we are making the effort to move using energy rather than moving using muscles with the accompanying tension. This focus is possible because the movements are slow and are carried out attentively; and they are not done with a distracting goal in mind.

We have the chance, therefore, to focus on clearing up unwanted muscle and brain activations that do not contribute to our movements. We can start to feel our own openness and spontaneity, leading to softness, speed, and ultimately even to generosity and sensitivity to others!

There is immense impact for our brain and body that results from action taken without tension. When our willpower is focused on the moment, and the brain is enabling exactly the desired movement (or cessation of movement), excess thought and tension starts to clear away, and we can better receive the healthy energy from our innermost mind/body.

Since Tai Chi Chuan practice is based on movement of energy with full awareness and without tension, the question arises, “How can we practice and achieve that full awareness without tension?”

Here is one answer that I can offer:

Our brain naturally controls our feet and fingers. Specifically, for action we need the arch as a weight-bearing foundation and the ball of the foot and big toe (along with supporting toes) to connect to and use the ground for traction and propulsion during movement. At the same time, the fingers carry out our desired action in the air, using the support of the earth and our feet.

If somehow, through an accident or stroke, we were to lose either connection to the toes or to the fingers, our brain will inevitably start to re-wire in order to create similar points of focus and action. That is, the human brain is wired as a physically dual engine: support on the solid earth, and movement through the air.

The expansion of energy we need for effective movement can only occur when there is solid support in place from both the earth/ground and the feet that are encountering the ground. When that support is present, the fingers can expressively lead the body to follow along, accomplishing what the mind wants with its passion and determination.

A football quarterback, even when forced to move backwards, will expand against the ground in order to support throwing the football to a receiver. This is similar to the Form’s “Step Back and Repulse Monkey” movement.

Our health, physical capacity, and well-being all improve when we can release excessive mind tension-activity and instead experience the flow of feeling-energy in motion.

If you have been practicing Tai Chi Chuan for a while, and are in a centered stated of mind, if something near you starts to fall your hand will automatically reach out and catch it accurately in mid-air. On the other hand, if you are tense and “lost in thought”, that tension-free movement will not happen and the falling object may not be caught successfully.

By practicing the form slowly, turning the awareness inwards, we can start to re-connect the mind, toes, and fingers. When our proprioceptive nerve feedbback and our movements are free and connected, then our movement comes from and is experienced with our whole being, with the whole body connecting the grounding of the feet and the expansion into the fingers.

ACTION:
When practicing the form, be sure to soften the mind and body before each action, and let the toes and fingers release or soften somewhat, as part of the preparation for action. Then, when taking action, feel the energy expand into your inner arch and especially your ball-and-toe, and correspondingly into your fingers.

The activation of ball-and-toe and correspondingly the fingers is a gradual expansion of energy guided by the brain. The brain directs increasing energy into the ball-and-toes of the supporting foot, and into the fingers, carrying out the desired action of the mind/brain working together.

For effective and frictionless action, we only need to activate the toes and fingers, while the arch of the foot provides support; the rest of the body, as directed by the brain, is relaxed while automatically expanding support for the two endpoints of toes and fingers, thus providing energy flow to accomplish the desired action to completion.

In a few words: Our mind/brain sets an intention and determination, and activates the support of the feet and the action of the fingers; the rest of the body is automatically adjusted to support those two endpoints.

Introduction

It is a privilege and joy to be able to share experiences and understanding that come from the practice and teaching Tai Chi Chuan. This is an endless path of learning and sharing, with realizations small and large along the way.

The way of Tai Chi Chuan, like other wisdom traditions, is subtle and not so easily grasped. Yet, on the other hand, it is grasped from the very beginning when a new practitioner tastes even a little bit of the warm energy and the spaciousness inside and out that Tai Chi Chuan practice awakens.

The forms practiced in Tai Chi Chuan are not just a series of movements, but a practice that nurtures opening to oneself and deepening connection with others. Through practice, the individual awakens to a formless softness and awareness, loosening the boundaries that excessively separate the individual from the bigger world.

The state of being soft (or relaxed) and alert is often thought of as a pair of opposites, but one of the beauties of Tai Chi Chuan practice is that we can experience how they exist simultaneously when we express our whole selves.

I want to thank Grandmaster William C.C. Chen for so diligently embodying and sharing these principles, as all of his long-time students have witnessed. He has modeled dedication to spreading awareness of the true principles of opening and mind / body connection, and a generous demeanor that arises from deep understanding of the principles of Tai Chi Chuan.

All the descriptions and imagery in the following pages are based on my own lived experience of practice and teaching. Along with meditation practice, I was able to become aware of these principles as a result of my efforts during Tai Chi Chuan studies, and was supported in this by Grandmaster Chen.

As a result of these 40+ years of study and teaching, this book is therefore both a record of the methods of GM William C.C. Chen and also a record of my own experience.

The ultimate purpose for writing this book is to offer guidance and inspiration for the true practice of Tai Chi Chuan, leading to a healthier and happier life for all. May you enjoy the fruits of this practice!

Mind and Brain

Mind and Brain

For purposes of discussion, we will for now separate our mental function into two parts: the software or “mind,” and the hardware or “brain.”

Rather than being totally discrete from each other, they overlap and are closely connected, but we can speak of the mind as that aspect of ourselves which gives orders to the underlying brain, while the brain is that aspect which carries out the actions the mind requests, by controlling the movements of the body.

The mind is essential for living in this world. The mind tells us to eat when we are hungry but before we do so, to finish a meeting that we are in the middle of. The mind tells us to pay bills, and when to pay them; to send invoices to customers; and to prepare and file taxes, again on a certain schedule. The mind lets us choose and reserve hotels and transportation if we are preparing for travel. And so on.

The mind / brain connection also provides emotions to motivate and energize us in carrying out various activities.

Where the mind does NOT function well, and gets in the way, is when there are unseen messages playing over and over in an endless loop. These often intense and usually hidden messages may say, “I am no good so stay away”, or “I am great so give me respect”, or “No one will like me”, or “This pain will never change.” In body language, the message might be summarized as “Protect yourself, because you are weak” leading to muscle tension and various aches and pains.

All of these messages cause distress in the mind and body, even if we are not aware of the specific messages. Examples of the resulting sensations are anxiety or depression in the mind, and pain or excessive fatigue in the body.

Tai Chi Chuan helps the mind perceive, interrupt, and release these extra, unneeded and counter-productive mental processes so that the mind / brain connection works quickly and seamlessly, with more enjoyment and energy, and less stress and discomfort.

The process by which Tai Chi Chuan works to release unneeded mental activity is the introspective awareness that we practice, which is the reason that the Short Form is practiced slowly. The flowing movements and pulsing energy of the Short Form encourages introspection, like a moving meditation. As we gaze inside and observe ourselves, we start to heal internal divisions.

Turning the light of awareness onto the mists of our inner world helps evaporate the illusory thoughts that lead to tension and stress.

When the mind and brain work smoothly together, we can catch a falling object without even knowing how we do it. We can get through each day without painful tension and stress. And we can be more genuine with other people, and enjoy our connections with others more fully.

In a few words: turning awareness inwards to experience our own deeper processes helps the mind simplify its activity, and frees the brain and mind to collaborate and function more smoothly and energetically as one, in all aspects of life.

What Is Tai Chi Chuan?

What Is Tai Chi Chuan?

What is the essence of Tai Chi Chuan? Regarding the short form, which many have witnessed practiced in public spaces, people are engaged in what appears to be a repetitive exercise. But why repeat those movements, day by day, year after year?

There must be essential elements that are stimulated or uncovered through this concentrated practice, or millions of individuals would not be continuing this practice. I would like to share with you the important essence behind the practice of Tai Chi Chuan, and how that essence benefits mental and physical well-being and health.

In this and subsequent articles, I will discuss these essential elements with you, the reader, based on my lifetime practice of Tai Chi Chuan. And if you are already familiar with these essential elements, I hope to support and share understanding and insight, for mutual benefit.

At nearly 70 years old, I am healthy and active, don’t need medication, and am in a good, positive state of mind. I attribute that good overall state to practicing Tai Chi Chuan and meditation, and trying to incorporate their principles of nondualism into daily life. Of course, given the nature of life, that good health could change at any time, but for now, it is something for which I am grateful.

Starting at the beginning, what does the name “Tai Chi Chuan” mean? Two translations you may encounter are “Grand Ultimate Fist” and “Great Polarity Boxing.” The two translations are pointing to the same transcendent understanding. Of course, words are always pointers; it is up to our selves to explore and experience the important meanings of the words.

It is our human nature, to contain and live with both passive, or yin, and active, or yang. These are the seeming “utimates” or “polarities”. And when we see and express both clearly, we can understand a truth which is beyond those opposites. “Fist” and “boxing” refer to the efforts for insight, as well as the efforts for the wise action of martial arts. Insight and action cannot be separated except as a convenience for discussion.

For me, Tai Chi Chuan is study of how our mind and body harmonize at a deep level, which results in a more meaningful experience of the world. Our clear mind and flowing energy, developed through practice, are experienced as spaciousness and true freedom.

Tai Chi Chuan practice is a way to turn our human potential into reality. I find that Tai Chi Chuan practice helps mind and body be more grounded, helps release tensions that would otherwise accumulate, and fosters that sense of spaciousness and true freedom.

So, with a topic as important as experiencing your best self day by day, let’s discuss the nature of this practice. In following articles, we will also discuss more specific principles, and ultimately look at the details of brain and body connection and movement that make this practice meaningful and impactful in everyday life.

Because it supports expression of the “grand polarities” of letting go and engaging energetically, Tai Chi Chuan is a practice of both mind and body. Human nature cannot live with fulfillment with only the physical, nor for that matter with only the mental; insight and expression go hand-in-hand and cannot truly be separated.

Without a good practice of presence, such as meditation or Tai Chi Chuan, we are liable to become wrapped up in inner and outer stresses. If we live with excessive passive, or yin, we will experience disruptive sadness and lack of energy, and not be able to release those. If we live with excessive active, or yang, we will experience anxiety and tension, and not be able to release those.

Conversely, letting go of opposites, letting go of tension based in worry for the past or future, and instead living peacefully in the present, with the flowing changes moment to moment, is like taking the best imaginable vacation, where well-being takes over—and there are no hotel or flight reservations needed!

Tai Chi Chuan is a practice of moving freely between our passive and active, and thereby uncovering and enabling the nondualistic fundamental nature that we all have as human beings. That is good for health as well as mental well-being. Nondualism means a non-conflicting mind, and freedom to express fully and with empathy, in each moment.

As practitioners of Tai Chi Chuan, we are walking on a path to greater understanding and expression of our essence, the best of our capacity as human beings. I believe that path is a foundation for living in the best way, moment by moment.

When the mind and body are harmonized, our actions become helpful and authentically compassionate, while our mind is able to find peacefulness, with reduced inner and outer conflict, and with more energy available for important activities.

That is the essence of Tai Chi Chuan, if we want to understand and experience its value. Although at the beginning of practice these principles are not very clear, through our efforts we can unfold a growing awareness and experience of these important principles, express more meaning in our daily lives, and be more effective in accomplishing our important goals in life.

In a few words: Tai Chi Chuan practice is a way to turn our human potential into reality by enhancing focus and expansive awareness.

Tai Chi Chuan exercise related change in brain function as assessed by functional near-infrared spectroscopy

Tai Chi Chuan (TCC) is a typical mind–body and low–intensity aerobic exercise that involves cognitive training and movement meditation and has positive associations with physiological and psychological conditions. TCC has metabolic equivalents estimated between 1.5 and 4.0.

This aerobic intensity overlaps with brisk walking which has been demonstrated to contribute to the prevention of cognitive decline, and rehabilitation of dementia and stroke; notably, TCC has been observed to improve power, balance, memory and attention after 6 months.

Moreover, TCC practice can affect the brain prefrontal structure and function and improve memory, as observed by functional magnetic resonance imaging (fMRI). The parietal and occipital cortices in TCC practitioners were found to have thickened through the same method.

Electroencephalo–graph (EEG) showed significant theta activities in the fronto–central and centro–parietal cortical areas in TCC practitioners and TCC have been shown to reduce anxiety and depression. However, the mechanism of the effects of TCC training on brain function remains poorly understood, especially in real–time body movements. Therefore, it is necessary to study the change in brain function related to TCC movement state.

Beyond the intensity of activity in a particular cortical region induced by TCC, significant differences in brain activity and dynamic configuration of connectivity were observed between the TCC and control groups during resting and movement states. These findings suggested that TCC training improved the connection of PFC, MC and OC in myogenic activity, sympathetic nervous system, and endothelial cell metabolic activities; enhanced brain functional connections and relayed the ability of TCC to improve cognition and the anti–memory decline potential… Read full article

Nosey, Noisy Muscles and Training Your Brain

Tai Chi Chuan ward off right, showing hands

In our daily lives, most of us, even those who consider themselves relatively relaxed and stress-free, are holding a lot of muscle tension in our bodies, and corresponding tension in thoughts and feelings.

As psychologists and scientists have been exploring for well over 100 years, there is activity in the brain–feelings, worries, and so on–that cause us to create that muscle tension. And we are not even aware of the majority of that tension, since it is habitual.

Tai Chi Chuan practice is one way to gradually release that tension. By focusing on full brain / mind / body integration and action, we start to cut through our own seemingly endless loops of thought and feeling, loops that create stress and loss of simple enjoyment in our selves.

I like to call the Yang-style Short Form a framework for self-development. The reason we repeat the “same” thing over an over is that each time we do so, we are learning something new.

The Tai Chi Chuan form is never the same, even for the same person who carries it out twice in a row. Each time we practice the form, we are actively creating our experience as we move slowly and with awareness from moment to moment.

What does that mean in practical terms? How do we do this?

One key is to understand and use the Yin-Yang polarity. As human beings we can never function in total release nor in total action. Life is a moment-by-moment flow between letting go and engagement, on a background that is neither one of those. That is our reality!

While practicing Tai Chi Chuan, we are connecting to and embodying that reality. And when that happens, our brain / mind / body starts to feel both more awake, and more free of stress. In pre-action moves we release into the ground and sink energy into the feet and below into the Earth. In the subsequent action move, the energy expands from toes to fingers, filling our whole brain / mind / body with warm feelings and energy. The flow between release/letting go and action/engagement helps our nervous system function better, circulation improve, and has other positive effects as well.

This scientific article points out positive, measurable brain effectiveness changes due to Tai Chi Chuan practice. It is dense reading, but the conclusions point to less “noise” when we activate functions, and more consistent integration of the parts of the brain that need to be integrated.

Grandmaster William C.C. Chen coined the term “nosey muscles”, referring to the unwanted activation of muscles that get in the way of simple, enjoyable movement. It turns out, we can also call them “noisy muscles”… that is, muscle and thought activations resulting from noise in the brain that interferes with clean, effective, enjoyable functioning in the moment.

Nosey, noisy: the key is to realize our brain can and should activate our body functions in a more integrated and less stressed manner.

Practicing the form day after day and year after year helps build a new set of circuits and a new set of resulting perceptions and experiences that allow us to accomplish more with less stress and more enjoyment. And that is a good thing, right?

Tai Chi Chuan optimizes the functional organization of the intrinsic human brain architecture in older adults

Brain and functional homogeneity, research article

Whether Tai Chi Chuan (TCC) can influence the intrinsic functional architecture of the human brain remains unclear. To examine TCC-associated changes in functional connectomes, resting-state functional magnetic resonance images were acquired from 40 older individuals including 22 experienced TCC practitioners (experts) and 18 demographically matched TCC-naive healthy controls, and their local functional homogeneities across the cortical mantle were compared.

Compared to the controls, the TCC experts had significantly greater and more experience-dependent functional homogeneity in the right post-central gyrus (PosCG) and less functional homogeneity in the left anterior cingulate cortex (ACC) and the right dorsal lateral prefrontal cortex. Increased functional homogeneity in the PosCG was correlated with TCC experience. Intriguingly, decreases in functional homogeneity (improved functional specialization) in the left ACC and increases in functional homogeneity (improved functional integration) in the right PosCG both predicted performance gains on attention network behavior tests.

These findings provide evidence for the functional plasticity of the brain’s intrinsic architecture toward optimizing locally functional organization, with great implications for understanding the effects of TCC on cognition, behavior and health in aging population… Read full article

What does the Cerebellum Do Anyway?. by Sarah Constantin, December 28, 2023Thanks to Paul Wirth of mosaicbodywork.com, who suggested this article

Brain, Toes, and Fingers: Clues About How They Connect

Three Core Principles of Tai Chi Chuan, for an Endless Path of Growth

Brain, Toes, and Fingers

Introduction

Mind and Brain

What Is Tai Chi Chuan?

What does the Cerebellum Do Anyway?.
by Sarah Constantin, December 28, 2023
Thanks to Paul Wirth of mosaicbodywork.com, who suggested this article