SCIENCE BEHIND

Equine Hanna Somatics® (EHS)

What is POSTURE?

Abnormal or Maladaptive Compensatory Posture

Posture is an unconsciously mediated adaptive process of the nervous system that organizes the body as best it can to remain upright and in equilibrium against gravity and environmental factors, moment by moment, within the range of motion allowed by the current levels of resting myofascial tone. (Mayer 2013)

As horses adapt to their environment, they learn to keep various muscles habitually contracted, creating persistent areas of elevated resting myofascial tonus (aka tension).

It is this persistent tension that pulls the horse out of his or her natural alignment, creates postural patterns, and negatively impacts movement, soundness and well-being.

And once it's learned, it becomes the 'new normal' default posture that is maintained by involuntarily mediated motor output coming from the brain stem...

PHOTOS: Horses who presented with various examples of the characteristic maladaptive compensatory habitual postures typically reversible with Equine Hanna Somatics® Education.

REFERENCES

Cacciatore, T. W., Anderson, D. I., & Cohen, R. G. (2024). Central mechanisms of muscle tone regulation: implications for pain and performance. Frontiers in neuroscience, 18, 1511783. https://doi.org/10.3389/fnins.2024.1511783

Criswell, E. & Mayer, A. (2006-2025) Equine Hanna Somatics® Professional Training Program Manual

Hanna, T. (1988) Somatics - Reawakening the Mind’s Control of Movement, Flexibility and Health. Da Capo Press

The PROBLEM

Chronic tension is a natural adaptive response to stress, trauma and repetitive motion. Manual therapy, stretching and strengthening or conscious efforts at controlling posture or 'relaxing' do not address the centrally controlled 🧠 nervous system complexities underlying muscle tone...(Cacciatore et al. 2024)

Vets, bodyworkers, physiotherapists, riders and trainers have always known relaxation and 'releases' were essential, but they were impossible to define, explain or access on demand. UNTIL NOW.

What is PANDICULATION?

Pandiculation, nature's postural reset.

Pandiculation is a natural behavior that contributes to the development and maintenance of a horse's neuromuscular integrity and mind-body integration at all ages and stages of life.

All animals spontaneously pandiculate, typically after a period of inactivity like sleeping or being confined.

Pandiculation can be done standing or laying down (ie. recumbent), and looks like a symmetrical full-body stretch, often accompanied by a yawn - or it can involve just one or two limbs at a time, or one limb and the neck, or wing… there are many variations on the ways different animals pandiculate.

Foals even pandiculate in their mother’s womb, and have been observed pandiculating up to 80 times per day after being born, as soon as on their 3rd day of life!

PHOTO: Aged Arabian mare demonstrating a spontaneous pandiculation reflex.

REFERENCES

A.F. Fraser, Pandiculation: the comparative phenomenon of systematic stretching, Applied Animal Behaviour Science, Volume 23, Issue 3, 1989, Pages 263-268, ISSN 0168-1591, https://www.sciencedirect.com/science/article/abs/pii/0168159189901172?via%3Dihub

Bertolucci L. F. (2011). Pandiculation: nature's way of maintaining the functional integrity of the myofascial system?. Journal of bodywork and movement therapies, 15(3), 268–280. https://doi.org/10.1016/j.jbmt.2010.12.006

McGreevy, P. (2012). Equine Behavior, A Guide for Veterinarians and Equine Scientists (2nd ed.) Saunders Elsevier

The SOLUTION

Dr. Eleanor Criswell Ed.D. created Equine Hanna Somatics® (EHS) - a hands-on method of helping horses change their own default posture by resetting their resting myofascial tonus (aka chronic tension) back to NORMAL NEUTRAL LEVELS.

EHS is horse-centric somatic education based on the principles of basic neuroscience and the natural tendency of horses to pandiculate.

VOLUNTARY PANDICULATION

EHS is Pandiculation ON-Demand

Instead of treating the horses body manually, we invite the horse to actively participate in the EHS movements, which allows us to work directly with the root-cause of most muscular tension - the brain and the way it organizes the body for movement.

By working WITH the horse's brain to engage the Pandicular Response on-demand, we can access the existing pathways and programs of the horse's nervous system to efficiently target areas of habitual tension - and facilitate the horse in normalizing them from the inside.

Equine Hanna Somatics® is the only system that teaches you how to safely and reliably harness the power of Pandiculation to help horses effect rapid and permanent changes ​to their own baseline levels of muscle tension.

ILLUSTRATION: ©2013 Horse Brain by Barbara Chasteen, from Equine Hanna Somatics - Session 1 (introductory course)

REFERENCES:

Criswell, E. (2021) How Eleanor Criswell Created Equine Hanna Somatics (originally published 1997, Somatics Magazine: Journal of the Bodily Arts and Sciences) https://blog.equinehannasomatics.org/post/creating-equine-hanna-somatics

Hanna, T. (1990) Clinical Somatic Education: A New Discipline in the Field of Healthcare. Somatics Magazine: Journal of the Bodily Arts and Sciences, 4-10.

Before we can accurately assess conformation, asymmetry, soundness, strength or behavioral issues, we must identify and address the involuntary habitual tension that is pulling the horse out of alignment and creating the persistent postural deviations, functional weakness and crookedness everyone is trying to correct.

Characteristic Equine Postural Presentations

The most common maladaptive compensatory postures are caused by habituated stress-responses, which typically present in one of three easily recognizable postural patterns:

The Green Light Reflex

The Green Light Posture shows up when a horse is startled, afraid or excited, and is commonly known as "fight or flight." This is the Startle/Action Response.

Habitual contractions above the vertebral column produce spinal extension, downward pressure on the thorax, a camped out limb position, and...

The Red Light Reflex

The Red Light Posture shows up when a horse is withdrawing from their reality, usually because they cannot escape confinement or pain, and is commonly referred to as "shut down" or "introverted." This is the Withdrawal Response.

Habitual contractions below the vertebral column produce spinal flexion, a camped under limb position, and...

The Trauma Reflex

EHS Equine Trauma Asymmetry Posture

The Trauma/Asymmetry Posture (ie. crookedness) is often mistaken for laterality or "natural asymmetry" and it shows up when a horse is contracting the muscles on one side of their body more strongly than the other. This is an Antalgic (pain-avoidance) Response involving the withdrawal and crossed-extensor reflexes that becomes habituated, or is learned from repetitive motion or asymmetrical bracing...

"The role of Equine Hanna Somatics® is to help a horse's brain recognize inefficient and unconscious muscle contractions that are no longer useful, so they can regain conscious control over their own muscles and, therefore, also regain access to their full range of motion, comfort, strength and endurance.”

- Alissa Mayer, Director of the EHS Professional Training Program

BENEFITS

Case Studies and Published Research

Cognitive Enhancement

Athletic Performance

Injury Prevention

Real-life stories and studies that show the benefits of Hanna Somatic Education on body & mind.

EHS, thoracic sling rehab, ehs, BTTM, nerve release, celeste,

Relaxation, Topline and Thoracic Sling improvements after 2 weeks of DIY Equine Hanna Somatics!

July 14, 20243 min read

Finally, my horse can walk like a normal horse!  This work has had a profound effect on my mare, Madeira, over the last 2 weeks since I purchased your Equine Hanna Somatics - Session 1 video course, and I am eternally grateful...

Thoracic Sling and Topline Improvement with Equine Hanna Somatics

A bit of history:

I tried for a number of years to use classic dressage in-hand work to help my mare Madeira find straightness, but I never could help her to find straightness or relaxation. I tried the Balance Through Movement Method protocol, religiously, for almost a year and yet was told that my horse has no thoracic sling....I kept trouble-shooting my failures and finally began to see that Madeira was always beginning every exercise/movement with her cheek cocked to the right. At first, I couldn't even see the posture; I just knew that for some reason we weren't getting anywhere in terms of relaxation, topline, or thoracic sling!

Meanwhile this past April Madeira's front shoes were removed as I was getting increasingly concerned that she was uncomfortable, that her feet looked like a TWH and that she might be better off barefoot even though the recommendation for her supposed ailments (navicular & arthritis) was to stay the course with both shoes and injections. Madeira is only going on 8 years old.

After a pretty difficult summer, barefoot wise, on December 1st 2023, she had excess toe taken off her hind feet and the outcome was scary.

While Madeira didn't seem really sore, she would at first refuse to walk and then lift her hind legs up high and slam her feet down....I texted my vet that "it almost seems like she has to relearn to walk."
I was pretty alarmed by her constant contracting of her hind legs and started googling trying to figure out what was going on..."sticky stifle?", "short toes?" and finally I literally googled "horse" and "sensory motor amnesia" and found your work. Also, this past July there was another weird occurrence when my ex-farrier trimmed over 1/2" of Madeira's heel off and it seemed to me that she moved completely differently afterward (negatively) with the front of her toe pointing toward the ground.....I kept thinking that it is like her tendon had contracted...?

UPDATE after 2 weeks of EHS (December 2023)

Anyway, now everything is going pretty well...since we started practicing EHS she can already walk like a normal horse for the first time in years!

UPDATE after 1 month of EHS (January 2024)

The most interesting developments that I attribute to the daily basic exercise and the longer somatic protocol (which I do every 2 - 3 weeks), is that Madeira's tendons have relaxed some, in her pasterns especially.  Even the trimmer noticed that a pastern tendon, that is usually prevalent, was smoother and hard to see. She doesn't look as upright, and Madeira is actually striding and stretching forward at the walk!  The trot is still rather stilted.  Her topline looks much better...you wouldn't think that muscle tension could cause a sunken topline but the only thing I can attribute to her more filled-out topline is the somatic exercises (the only other exercise she gets right now is hand-walking).

UPDATE in March 2024 - We are riding 3x a week!

The appointment with the vet on January 31st went really well.  I was a bit shocked at how well Madeira was moving compared to December when even walking was difficult for her.  The vet too, said that he thought he was going to prescribe joint injections but that she moved so much better than the  video he had seen (from November 28th, 2023) that he recommended just keeping on the same track with the barefoot trimmer "working her magic." ;)

I'm actually riding a bit (3x a week, 25 minutes) along with hand-walking both up hills and over cavalettis!

Alissa,  thank you so much for your enthusiasm as well as your efforts to get Equine Hanna Somatics out into the world.  It has really helped and I am really looking forward to continuing on this journey as well as sharing it with others.

- Kristen Mullen & Madeira

btmmbalance through movement methodsession 1instructional videotoplinetendonhigh heelsrehabthoracic slingdressagein-handcontracted tendons
blog author image

Alissa Mayer BSc(Equine) C-EHSE

Alissa Mayer is the Director of the Equine Hanna Somatics Professional Training & Certification Program and founder of the Association for Equine Hanna Somatics Education (AEHSE).

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EHS is not something that can be done TO a horse by the practitioner, but is a voluntary activity the horse engages in - a conversation the horse has WITH their own nervous system.

GET THE INTRODUCTORY ONLINE COURSE:

Equine Hanna Somatics - Session 1

Equine Hanna Somatics® is the only system that teaches you how to harness the powerful natural reflex of Pandiculation to help horses effect rapid and semi-permanent changes ​to their own baseline levels of muscle tension - from within.

Disclaimer: Equine/Canine/Human Hanna Somatics is not bodywork or manual therapy, and is not a diagnostic or treatment tool. The information included on this website and in any affiliated programs is is intended for educational purposes only and is not meant to take the place of professional veterinary or medical advice, may not be current, and is subject to change without notice. We encourage all members of the community to seek guidance from a licensed veterinarian, physician or allied healthcare practitioner regarding specific medical concerns or questions about your own or your animal’s health.

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