10/15/2026
Squeeze your bones with your own muscles.
The Bone–Brain Connection: How Mechanical Stimulation Can Influence Brain Function
New research reveals a fascinating connection between mechanical stimulation of bone and brain function.
Researchers found that applying controlled compression to the shin bones of mice and pigs following traumatic brain injury improved aspects of their movement, cognitive function and neurological recovery.
The mechanism is particularly interesting. Bone is not simply a rigid structure that supports the body. It is living, biologically active tissue containing cells that detect and respond to mechanical forces.
When stimulated, these cells can convert physical forces into biochemical signals through a process called mechanotransduction. In this study, mechanical loading activated specialized bone cells, triggering biological responses that influenced processes involved in brain protection and recovery.
The findings suggest that bone participates in a previously underappreciated communication system with the brain, demonstrating how mechanical forces applied to one part of the body can produce physiological effects elsewhere.
For those of us interested in massage, movement and the relationship between the body’s tissues and nervous system, this research adds another dimension to our understanding of how mechanical stimulation can influence physiology.
Bone Is More Than a Structural Framework
We tend to think of bones primarily in terms of their mechanical functions. They support the body, protect organs, provide attachment points for muscles and transmit forces during movement.
But bone is also a living, metabolically active tissue that continually adapts to the forces placed upon it.
Every time an animal stands, walks, runs or changes direction, forces travel through its skeleton. Muscles also place substantial loads on bones as they contract and pull through their tendon attachments.
These forces are important biological stimuli.
Bone contains several types of cells, including osteoblasts, which produce new bone tissue; osteoclasts, which break down bone; and osteocytes, which are embedded within the bone matrix.
Osteocytes are particularly important because they detect mechanical loading and help coordinate the tissue’s response.
They are connected through an extensive network of tiny channels that allow communication between cells and the movement of fluid through the bone.
When bone is loaded, the resulting deformation and fluid movement stimulate these cells, initiating responses that influence bone maintenance, remodeling and adaptation.
This is one reason bones respond to regular physical activity. Mechanical loading provides information that helps regulate how bone tissue is maintained and strengthened.
However, the new research suggests that the consequences of mechanical loading may extend beyond bone itself.
How Mechanical Forces Become Biological Signals
The process that allows cells to detect and respond to physical forces is called mechanotransduction.
Mechanotransduction occurs throughout the body, including in bone, muscle, tendon, fascia, skin and other connective tissues.
Cells contain structures and proteins that respond to mechanical changes in their environment.
When tissues are compressed, stretched, sheared or otherwise loaded, those forces can alter cell shape, membrane tension, cytoskeletal activity and the behavior of mechanically sensitive proteins.
These changes can activate intracellular signaling pathways that influence cellular activity.
One important group of mechanosensitive proteins is the PIEZO family of ion channels.
PIEZO channels respond to mechanical forces by opening pathways that allow ions to cross cell membranes. This changes cellular signaling and can initiate further biochemical responses.
In bone, PIEZO1 plays an important role in how osteocytes detect mechanical loading.
The new study identified osteocyte PIEZO1 as a key part of the mechanism linking controlled tibial compression with improved neurological recovery after brain injury.
This is an important distinction: the researchers were not simply observing that pressure made the animals feel better. They were investigating how mechanical forces activated a specific cellular pathway that produced measurable biological effects.
What the Researchers Discovered
The researchers applied controlled mechanical compression to the tibia, the large bone of the lower leg, in experimental models of traumatic brain injury involving mice and pigs.
The treatment was associated with improvements in neurological recovery, including measures of movement and cognitive performance.
Further investigation suggested that mechanical loading activated PIEZO1 channels in osteocytes, triggering the release of signaling molecules that could influence processes involved in brain injury and recovery.
The researchers identified several substances associated with this response, including HSP70, IL-1R2 and APOL11a, along with changes in other circulating factors.
These findings suggest that bone cells can participate in communication with distant tissues through substances released into circulation.
The researchers also investigated whether the effects depended on osteocyte PIEZO1 activity.
When this pathway was disrupted experimentally, the protective effects were lost, providing evidence that mechanically responsive bone cells were important to the observed results.
The significance is that the response was not limited to the bone receiving the mechanical force.
Mechanical stimulation initiated biological signaling associated with changes in the brain.
This suggests that the skeleton may have a more active role in communicating with the nervous system than its familiar structural and mechanical functions would suggest.
The Bone–Brain Communication System
The relationship between bone and the brain is not entirely new.
Bone has increasingly been recognized as an endocrine organ, meaning it produces substances that can influence the activity of other tissues and organs.
One of the best-known examples is osteocalcin, a protein produced by bone-forming cells that has been investigated for its roles in metabolism and nervous system function.
Research has explored how bone-derived signaling molecules may influence processes involving energy regulation, stress responses and brain activity.
The new findings add an important mechanical dimension to this relationship.
They suggest that physical loading of bone can influence the release of biologically active substances involved in communication with the brain.
In other words, mechanical forces may help regulate not only the structure and strength of bone, but also aspects of its signaling activity.
This broadens the way we think about the skeleton.
Bone is not simply responding to instructions from the nervous system and the forces generated by muscles. It may also provide biochemical information that influences other parts of the body, including the brain.
What This Means for Horses
Although this study involved mice and pigs rather than horses, the underlying principles of bone mechanotransduction are relevant to equine physiology.
Horses experience substantial mechanical loading through their skeletons during standing and movement.
Every stride involves changing forces transmitted through the limbs, joints and vertebral column.
Muscular contractions also generate forces that act on bones through tendons and other attachments.
These mechanical loads are essential to normal skeletal function.
Bone tissue responds to the magnitude, direction, frequency and duration of loading. Appropriate physical activity helps maintain skeletal health, while prolonged reductions in loading can contribute to loss of bone mass and changes in bone structure.
The new research raises an additional question: could mechanical loading of the equine skeleton also influence biological signaling beyond the bones themselves?
That possibility is worth investigating.
However, the neurological recovery effects observed in the experimental study have not been demonstrated in horses, and we do not yet know whether ordinary equine movement produces comparable bone-derived signals or brain responses.
What we can recognize is that the equine skeleton is a living, mechanically responsive tissue that participates in a much larger physiological system.
How Massage and Movement Fit Into This Relationship
Massage and movement both apply mechanical forces to the body, but they do so in different ways.
Movement generates forces through muscle contraction, tendon tension, joint loading and weight-bearing. These forces travel through the skeleton and stimulate the mechanically responsive cells within bone.
Massage applies compression, stretch, shear and movement primarily to the skin, fascia, muscles and other soft tissues.
Both involve mechanotransduction, but the tissues being stimulated, the magnitude and direction of the forces, and the resulting biological responses are not necessarily the same.
Understanding these differences helps us appreciate how massage and movement may complement one another.
Massage and Mechanotransduction in Soft Tissues
During massage, the therapist applies mechanical forces directly to the soft tissues.
These forces deform tissues, influence local fluid movement and stimulate cells and sensory receptors that respond to mechanical changes.
At the cellular level, mechanical stimulation can influence signaling pathways involved in tissue regulation and adaptation.
However, the precise cellular effects depend on the type of tissue, the forces applied and the physiological condition of the cells.
Massage also stimulates sensory receptors in the skin, muscles and connective tissues.
These receptors send information through peripheral nerves to the spinal cord and brain, where it contributes to sensory processing, pain modulation and the regulation of muscle activity.
This means massage can influence the body through more than one mechanism.
It produces direct mechanical effects within the soft tissues while also providing sensory input that can influence nervous system responses.
For a horse experiencing muscular discomfort or protective muscle tension, these effects may help improve comfort and tolerance of movement.
Massage that the horse experiences as pleasant may also encourage a calmer physiological state and influence autonomic nervous system activity.
The important connection to the bone–brain research is that mechanical stimulation can initiate biological responses extending beyond the immediate site of force application.
However, the study did not investigate massage, and we cannot assume that pressure applied through the skin and muscles activates osteocytes in the same way as controlled compression of bone.
The more useful lesson is that mechanical forces are biologically meaningful and that different tissues possess mechanisms for detecting and responding to them.
Movement and Mechanical Loading of Bone
Movement provides a more direct connection to the mechanisms investigated in the study.
When a horse walks, trots or canters, the skeleton experiences repeated cycles of loading and unloading.
Ground reaction forces travel through the limbs, while muscular contractions generate additional forces through tendon attachments.
These forces produce small deformations within bone and stimulate the osteocytes responsible for detecting mechanical loading.
This is part of the normal process through which bone adapts to physical activity.
Movement also increases circulation, engages muscles and connective tissues, stimulates proprioceptive pathways and requires continuous coordination between the nervous system and musculoskeletal system.
The horse’s nervous system receives information about joint position, muscle activity, loading, balance and movement while simultaneously regulating the muscular activity required to produce the next stride.
The new research suggests that mechanically stimulated bone cells may provide an additional biochemical communication pathway between the skeleton and the brain.
Whether this pathway contributes to the neurological benefits of ordinary exercise in horses remains unknown, but it offers an interesting direction for future research.
Why Massage and Movement Complement Each Other
Massage and movement provide different forms of mechanical stimulation.
Massage allows the therapist to apply controlled forces to specific soft tissues, adjust the pressure and direction of those forces, and respond to differences in muscular tension, tenderness and tissue mobility.
Movement provides repeated loading through the skeleton, activates muscles and tendons, stimulates joint and muscle receptors, and requires coordinated activity throughout the body.
For horses experiencing muscular discomfort or restricted movement, massage may help make subsequent activity more comfortable.
A comfortable hand walk following massage can then provide an opportunity for circulation, coordinated joint and muscle movement, sensory integration and normal weight-bearing.
During massage, the sensory information coming from the horse’s body changes as tissues are touched, compressed, stretched and moved.
When the horse begins walking, his nervous system must integrate incoming sensory information with balance, joint movement, muscle activity and foot placement.
At the same time, the skeleton experiences the mechanical loading associated with weight-bearing movement.
This illustrates how different forms of mechanical stimulation can work together within the body’s normal physiology.
Massage primarily provides localized soft tissue stimulation and sensory input, while movement adds active muscular contraction, skeletal loading and whole-body coordination.
Neither produces exactly the same mechanical environment as the other.
Together, they offer complementary opportunities to stimulate tissues and support comfortable movement.
Looking at the Body as an Interconnected System
Perhaps the most important implication of this research is that mechanical forces can influence biological processes far beyond the tissues receiving those forces.
Bone, muscle, fascia, tendons and other connective tissues are not simply passive structures that respond to movement.
They contain living cells capable of detecting mechanical changes and responding through cellular signaling.
The nervous system is also continuously receiving information from these tissues and using it to regulate movement, posture, muscle activity and physiological responses.
The new bone–brain research adds another dimension by demonstrating, in experimental animal models, that mechanical loading of bone can activate a biochemical signaling pathway associated with improved neurological recovery.
For equine massage therapists, this reinforces the importance of understanding the body’s response to mechanical stimulation.
Massage is not simply a matter of applying pressure to tight muscles. It involves mechanical interaction with living tissues and sensory stimulation that can influence how the nervous system responds.
Movement adds another layer through muscular contraction, weight-bearing, skeletal loading and coordinated whole-body activity.
The research does not establish that massage produces the same bone–brain effects observed with controlled tibial compression. But it strengthens a broader principle: mechanical forces are not merely physical loads. They are also sources of biological information.
Understanding how different tissues detect and respond to those forces helps us appreciate the physiological relationships between massage, movement, connective tissues and the nervous system.
And it reminds us that the effects of mechanical stimulation may extend well beyond the area where the force is first applied.
https://koperequine.com/how-the-autonomic-nervous-system-affects-bone-tissue/
