23/02/2026
HIO Conference: The overall topic was Soundness and Symmetry.
We had wonderful lectures and demos over the three days from Dr Kevin Haussler, a veterinarian, chiropractor and renowned researcher who carefully set these concepts out in detail and how they are or may become clinically significant in our horses.
The following are my take home points from listening and talking to him.
🐴 Laterality is cortical (brain) dominance producing preference of use of one homologous part over another. Right handedness in humans for example being at around 90% of the population. It exists in horses too but in studies is closer too 40/40 left/right and 20% ambidexterity.
Laterality may impact performance and injury risk could be higher if preferential use of one limb causes excess loading / strain. However it might represent beneficial functional adaptation and therefore be subject to natural selection in the population.
🐴 Symmetry/asymmetry denotes changes in size, shape, or relative position and differs from functional laterality.
Causes included genetic/embryologic asymmetry (organ placement - hearts are on the left for example), conformation (bone lengths - unequal metacarpal bones have been described in the horse), training/handling (left-side mounting, asymmetric saddles), and pain-driven compensation due to disease.
As your physio I will
🔶look for and support functional asymmetry, treating any compensatory pain which might result (alongside your vet practice).
🔶 help build a strong and symmetrical musculature with exercise prescription within the horse’s capacity.
🔶 encourage equal proprioceptive response with targeted exercises.
🔶 refer for veterinary diagnosis in observed limb or axial skeleton pathology/ pain.
🔶 liaise with saddle fitters farriers and vets working to minimise asymmetry.
Update the tool box and take reproducible objective traces of the horses wither and back.
Thank you Gillian Tabor
Consider updating your gait asymmetry scale from 5 to 8 following advice from Sue Dyson.
Thank you Dr Dyson
Honour the horse as an individual with his or her own adaptations to the questions we ask.