12/09/2026
⚠️ KISSING SPINE: The man, the myth, the legend. ⚠️
This is a long one kids so buckle up - you all know how obsessed with KS I am as a pathology.
Kissing spine is often spoken about as though it is one single problem with one single treatment.
But from an MSK point of view, it is much more useful to ask:
What are we actually treating?
Because pain, structure, soft tissue and function are not the same thing and different interventions target different parts of that picture.
A horse may have close or overriding dorsal spinous processes on imaging - that is the structural finding.
But - structure alone does not tell us the whole story.
There may also be local inflammation, nociceptive input and tissue sensitivity. There may be irritation or pathology involving the interspinous ligament. There may be secondary epaxial muscle tension, protective guarding and altered recruitment around the thoracolumbar region.
And then there is function…
• How well is the horse controlling the spine?
• How freely is the thoracolumbar region moving?
• How are the epaxial and supporting muscles recruiting?
• Has the horse developed compensatory strategies elsewhere?
• How is the pelvis moving?
• How is load being transferred through the body?
• Has pain changed the way the horse has learned to move?
This is where I think treatment discussions can become oversimplified.
▫️The steroid injection ▫️
A steroid injection, for example, is primarily targeting pain and inflammation.
It can reduce the painful or inflammatory environment around the affected interspinous region and, in some horses, that may significantly improve comfort.
But:
• It does not physically widen the gap between the dorsal spinous processes.
• It does not remove bone.
• It does not automatically restore spinal control or rebuild muscle.
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▫️The ostectomy / bone shave ▫️
A bone shave or ostectomy is doing something completely different.
That procedure physically alters the bony anatomy and creates more space between the affected processes.
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▫️ Interspinous ligament desmotomy ▫️
A ligament snip, or interspinous ligament desmotomy, is different again. It alters the interspinous ligament and local tissue environment.
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▫️ Rehabilitation ▫️
That is where the focus shifts toward function:
• Strength
• Control
• Coordination
• Movement quality
• Progressive loading
• Rebuilding the horse’s capacity to use the thoracolumbar spine effectively again.
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So:
Steroid ≠ bone shave ≠ ligament snip ≠ rehabilitation.
They are not interchangeable because they are not trying to achieve the same biological outcome.
That is why “the treatment worked” can mean very different things.
• Did pain reduce?
• Did the anatomy change?
• Did the horse return to work?
• Did the horse return to the same level of performance?
• Did the horse simply become easier to ride?
• Did spinal function actually improve?
Those are all different outcomes.
From an MSK perspective, perhaps the most important part comes afterwards.
Because - even if pain has been successfully reduced, the horse may still have spent weeks, months or even years protecting that region.
→ Guarding does not necessarily disappear overnight.
→ Muscular weakness does not immediately reverse.
→ Altered recruitment patterns do not automatically normalise.
→ Compensatory movement strategies can remain even when the original pain generator is much quieter.
So, the horse still has to relearn how to use the body well.
This means restoring appropriate spinal movement, improving muscular recruitment, rebuilding strength and endurance, addressing compensation and gradually increasing load until the horse can tolerate the demands of normal work again.
This is also why two horses with very similar radiographs can behave, move and respond completely differently.
The X-ray is important, but it is one part of a much bigger clinical picture.
Treating the radiograph and rehabilitating the horse are not the same thing:
• Pain matters
• Structure matters
• Soft tissue matters
• Function matters
• And good rehabilitation is about understanding how all of those pieces fit together in the individual horse standing in front of you.
⚠️ There is one part of the conversation that doesn’t get talked about enough: quality of life.
• Not every horse with kissing spine needs to return to ridden work.
• Not every horse will.
• And not every horse should.
Sometimes the kindest, most appropriate outcome is retirement, a lower-level workload, hacking, groundwork, or simply living comfortably without the pressure to return to the job they had before.
From an MSK perspective, success should not only be measured by whether a horse gets back in the arena.
It should also be measured by:
→ Is the horse comfortable?
→ Can they move freely enough to enjoy daily life?
→ Can they lie down, roll, graze and interact normally?
→ Are they able to cope with the physical demands we are asking of them?
→ And are those demands still fair?
❗️There is no failure in changing the goal.
Sometimes rehabilitation is about rebuilding performance.
Sometimes it is about rebuilding comfort.
And sometimes the most successful outcome is recognising that the horse’s quality of life matters more than getting them back to work.
This post is from an MSK and rehabilitation perspective and is not intended to diagnose kissing spine or recommend veterinary treatment. Veterinary diagnosis and treatment decisions should always sit with the treating vet.