An anatomical study of the subarachnoid space surrounding the trigeminal ganglion in horses-in preparation for a controlled glycerol rhizotomy in equids.
Authors: Becker Richard, Haenssgen Kati, Precht Christina, Khoma Oleksiy-Zakhar, Hlushchuk Ruslan, Koch Christoph, Kaessmeyer Sabine, de Preux Mathieu
Journal: Frontiers in veterinary science
Summary
# Editorial Summary: Subarachnoid Space Anatomy of the Equine Trigeminal Ganglion Trigeminal-mediated headshaking in horses represents a debilitating neuropathic pain condition analogous to trigeminal neuralgia in humans, for which glycerol rhizotomy—selective chemical destruction of pain fibres within the trigeminal ganglion—offers therapeutic potential in cases refractory to medical management. Becker and colleagues conducted a detailed anatomical investigation to establish whether horses possess a cerebrospinal fluid-filled subarachnoid space surrounding the trigeminal ganglion comparable to the Meckel's cave found in human anatomy, a critical prerequisite for safe percutaneous glycerol injection. Using advanced imaging and anatomical dissection techniques, the research team confirmed the existence of this CSF-filled dural recess in equine specimens, providing the foundational anatomical knowledge necessary to adapt the human rhizotomy procedure for equine patients. These findings are significant for farriers, veterinary surgeons, and rehabilitation specialists managing horses with idiopathic trigeminal neuralgia, as they validate the anatomical feasibility of minimally invasive glycerol rhizotomy as a potential treatment option when conventional therapies fail. Understanding the precise spatial relationships and dimensions of the equine trigeminal ganglion compartment will inform safer procedural technique development and potentially expand the therapeutic toolkit for one of equine practice's most challenging pain conditions.
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Practical Takeaways
- •Glycerol rhizotomy, a proven human treatment for trigeminal neuralgia, may now be considered as a surgical option for horses with refractory trigeminal-mediated headshaking
- •This anatomical confirmation enables clinicians to develop and refine percutaneous injection techniques specific to equine anatomy for targeted pain fiber destruction
- •Understanding the CSF-filled space around the equine trigeminal ganglion is essential for safe procedural planning and reducing complication risk during intervention
Key Findings
- •A CSF-filled subarachnoid space surrounding the trigeminal ganglion exists in horses, analogous to the human Meckel's cave
- •The anatomical arrangement supports the feasibility of percutaneous glycerol rhizotomy as a treatment approach in equids
- •Detailed anatomical characterization of the dural recess and trigeminal ganglion space provides the foundation for surgical technique development in horses