Feldenkrais® Summit & Study Page

Upcoming Feldenkrais® FREE ONLINE Summit
May 1 – May 10, 2020. Just TWO days away!
Feldenkrais®-Summit-2020-Calendar purchase the ALL ACCESS PASS to receive dozens of downloadable Awareness Through Movement® lessons, audio and video interviews, panel discussions, study materials, transcripts, Follow this link to sign up for the full package. [Disclosure: if you use our links above,Thinking in Movement Studio may receive a commission ~ thank you for supporting the studio and the summit.]

​Meanwhile, you may enjoy a special collection of YouTube clips and notes from the current and past Feldenkrais® summits.
Welcoming you to comment or request elaboration on any of the themes.  I plan to add blog posts for your chosen topics!

​The terms Feldenkrais, Awareness Through Movement, and Functional Integration are registered service marks in Canada of the Feldenkrais Guild of North America (FGNA).

Coronavirus Tomas Pueyo ~ Neil Dunaetz Reading & Discussion March 29 – April 2, 2020

Special Online Reading & Discussion “Coronavirus: The Hammer and the Dance:”
A most recent article by Tomas Pueyo and invitation to join Neil Dunaetz in discussing it on Zoom.
Sunday, March 29 – Thursday, April 2, 2020
9-11 am Pacific. Noon – 2 pm Eastern (attend one or more days)
NOTING a second excellent article by Tomas Pueyo,
  Neil Dunaetz writes: “In “Coronavirus: The Hammer and the Dance: What the Next 18 Months Can Look Like, if Leaders Buy Us Time” Pueyo makes a distinction between “MITIGATION,” also known as “FLATTENING THE CURVE” somewhat, and “SUPPRESSION,” measures that quickly “BREAK THE BACK” of pandemic transmission of the coronavirus (as has been achieved in several East Asia countries).”  [emphasis added by Katarina]

The seminar will centre on ” the goal of understanding Pueyo’s distinction between “mitigation” and “suppression”

At the end of this post are quotes from the article.

Neil Dunaetz writes:

In “Coronavirus: The Hammer and the Dance: What the Next 18 Months Can Look Like, if Leaders Buy Us Time” Pueyo makes a distinction between “mitigation,” also known as “flattening the curve” somewhat, and “suppression,” measures that quickly “break the back” of pandemic transmission of the coronavirus (as has been achieved in several East Asia countries).

I feel this to be the best thinking to date on what we are up against and what we need to do.

Starting tomorrow, Sunday March 29, I will host a series of discussions on Zoom with the goal of understanding Pueyo’s distinction between “mitigation” and “suppression” as differing strategic approaches to dealing with the coronavirus outbreak, and their respective differing implications for our future.

Sunday March 29, 12pm-2pm New York time

Monday March 30, 12pm-2pm New York

Wednesday April 1, 12pm-2pm New York

Thursday April 2, 12pm-2pm New York.

You may join any one or more of these gently-moderated-by-me discussions, as you wish. Let me know if you are interested and I will send you the Zoom link. It is free to participate.

Please try to read the article in advance, if you can.  If you don’t, that’s OK too.

And feel free to forward this email to others who might be interested.

Neil Dunaetz

[email protected]



This article follows Coronavirus: Why You Must Act Now, with over 40 million views and 30 translations. If you agree with this article, consider signing the corresponding White House petition. Over 30 translations available at the bottom. Running list of endorsements here. Over 10 million views so far.

Summary of the article: Strong coronavirus measures today should only last a few weeks, there shouldn’t be a big peak of infections afterwards, and it can all be done for a reasonable cost to society, saving millions of lives along the way. If we don’t take these measures, tens of millions will be infected, many will die, along with anybody else that requires intensive care, because the healthcare system will have collapsed.

Within a week, countries around the world have gone from: “This coronavirus thing is not a big deal” to declaring the state of emergency. Yet many countries are still not doing much. Why?

Every country is asking the same question: How should we respond? The answer is not obvious to them.

Some countries, like France, Spain or Philippines, have since ordered heavy lockdowns. Others, like the US, UK, or Switzerland, have dragged their feet, hesitantly venturing into social distancing measures.

Here’s what we’re going to cover today, again with lots of charts, data and models with plenty of sources:

  1. What’s the current situation?
  2. What options do we have?
  3. What’s the one thing that matters now: Time
  4. What does a good coronavirus strategy look like?
  5. How should we think about the economic and social impacts?

Study page ~ ‘The Weber-Fechner-Henneman Movement Optimization Cycle’  (Russell 2017)


“Roger Russell, M.A., PT, trained with Moshé Feldenkrais in San Francisco, Amherst, and Israel (1975 – 1982). A movement scientist, physical therapist, and Feldenkrais trainer, he is co-director of the Feldenkrais-Zentrum in Heidelberg, Germany. Since 1975, he has been intrigued by the network of ideas, including neuroscience, which stands behind the practical methods that Feldenkrais developed. He is one of the initiators of the Feldenkrais Science Network and a leading participant in the FGNA/FEFNA symposia Movement and the Development of Sense of Self (2004) and Embodying Neuroscience (2012). www.feldenkraiszentrum-hd.de/de/ ”

‘The Weber-Fechner-Henneman Movement Optimization Cycle’
by Roger Russell 2017 in The Feldenkrais® Journal!


Know-how and know-what

Muscle fibers and the Henneman size principle

Sensory feedback and the Weber-Fechner principle

The Coordination Cascade
1 The brain initiates and plans movements based on our self-image, and directs
2 the coordination cascade through the nervous system leading to
3 the spinal cord, where the Henneman size principle results in
4 specific (size-dependent) recruitment of muscle fibers which
5 enables optimal biomechanical organization of the ongoing
6 including force optimization, smooth movements, and
reversibility of the movement pattern
7 which by way of the Weber-Fechner principle increases
the sensitivity of the proprioceptive feedback networks
8 clarifying the body image, and resulting in more efficient
plans for the next coordination cycle. Movement coordination improves as the Feldenkrais lesson unfolds.



© Copyright Roger Russell 2017 for all images. Art: Bettina Beiderwellen, Speyer, Germany. Coordination Cascade: Susanne Mertner, Nördlingen, Germany and Stefanie Ho , Saarland, Germany.

1 ER Kandel, JH Schwartz, TM Jessell, Principles
of Neural Science, 4th ed. (New York: McGraw- Hill, 2000), 419-428. The most comprehensive English-language source on Fechner is Michael Heidelberger, Nature from Within: Gustav Theodor Fechner and His Psychophysical Worldview, Cynthia Klohr, trans. (Pittsburgh: University of Pittsburgh Press, 2004). Heidelberger’s book also serves as an excellent introduction to Weber’s work.

2 Elwood Henneman, “Relation between size of neurons and their susceptibility to discharge,” Science 126 (1957), 1345-1347

3 Simon Blackburn, Oxford Dictionary of Philosophy (Oxford: Oxford University Press), 123.

4 RS Reber, “Implicit Learning and Tacit Knowledge,” Journal of Experimental Psychology: General 118, no. 3 (1989), 219-235
5 LR Squire, D Berg, FE Bloom, S du Lac, A Ghosh, NC Spitzer, Fundamental Neuroscience, 4th ed. (Amsterdam: Academic Press–Elsevier, 2013), 616–651.

6 Moshe Feldenkrais, Body and Mature Behavior (Tel Aviv: Alef Publishers 1947/1988).

7 Kandel et al., 683–687.

Fig 1 Schematic diagram of a transected muscle showing the three muscle fiber types

Fig 2 Force and contraction time of:
T) Tonic slow fibers;
F-R) Fast-fatigue-resistant fibers;
F-F) Fast-fatigable fibers

Fig 3 Spinal alpha motor neurons and the three muscle fiber types—the size of spinal motor neuron cell bodies (triangles) matches the muscle fibers they enervate

Fig 4 Brain recruitment of spinal alpha motor neurons and muscle fibers—Elwood Henneman discovered that the size of the neuron cell body determines the order in which motor nerves and their muscle fibers are recruited

8 NA Bernstein, “On Dexterity and Its Development,” in ML Latash and MT Turvey, eds., Dexterity and Its Development (Mahwah, NJ: Lawrence Erlbaum, 1996); DA Winter, Biomechanics and motor control of human movement, 2nd ed. (New York: Wiley-Interscience, 1990).
9 Elwood Henneman, EG Somjen, DO Carpenter, “Functional significance of cell size in spinal motoneurons,” Journal of Neurophysiology 28 (1965), 560-580; Elwood Henneman, EG Somjen, DO Carpenter, “Excitability and inhibitability of motoneurons of di erent size,” Journal of Neurophysiology 28 (1965), 599-620.

10 KV Kardong, Vertebrates: Comparative anatomy, function, evolution, 3rd ed. (Boston: McGraw Hill, 2002), 375.

11 FW Nutter, “Weber-Fechner Law,” Plant Pathology and Microbiology Publications 71 (2010), accessed online July 27, 2017, http://lib.dr.iastate.edu/ plantpath_pubs/7

Fig 5 Subjective experience and absolute stimulus value in the cases of pain, light, and weight

Fig 6 Relationship between force/ weight and just noticeable difference thresholds in different activities—the just noticeable difference (jnd) for muscle effort varies for strength training, endurance, and coordination exercises— using low force in Feldenkrais lessons allows us to sense smaller differences in our movements

Fig 7 Relationship between force/weight and information impact in different activities—turning the curve in Fig. 6 around shows that when force is reduced, the impact of feedback information for our coordination is higher than it is in strength and conditioning exercises done with more effort

Fig 8 The Coordination Cascade illustrates how Feldenkrais lessons refine the functioning of our nervous system—at every level

12 “Gregory Bateson,” http://www.informationphilosopher.com/solutions/scientists/ bateson/ (accessed July 27, 2017).

13 Roger Russell,Poster: The Coordination Cascade and the Feldenkrais Method, 2014, Feldenkraiszentrum- Heidelberg. This image is a top-down schematic representation of how movement experiments can be directed by the prefrontal system for exploratory fast learning. Multiple sources in neuroscience literature have served as background knowing what for this poster, which is available through the FGNA bookstore.

14 Squire et al., 616–651

Fig 9 The Weber-Fechner- Henneman Movement Optimization Cycle

15 Kandel et al., 661-663 and 726-730.

Pen and ink drawings of “Book on Foot” and “Dead Bird” Feldenkrais Awareness Through Movement lessons by Andrew Dawson, 2016′



Below are links to informal recorded readings of Roger’s article and the references.
(our usual password or ask for the password )
The Weber-Fechner-Henneman Movement Optimization Cycle by Roger Russell 2017 (K reading text)
The Weber-Fechner-Henneman Movement Optimization Cycle by Roger Russell 2017 (K reading REFERENCES)