12/09/2024
Very interesting and thought provoking study
Below, two lumbars and sacrums with two very different stories.
The top specimen is from a standardbred/welsh 13.2hh pony who despite having ECVM made it to 25 with only a few minor symptoms. She was put down for laminitis and arthritis getting the better of her. Her lumbar and sacrum are the normal anatomy for this area.
The bottom specimen a 8 year old Thoroughbred returned from racing in Hong Kong shows a very common finding among my dissections. 60 percent based on my dissections across breeds but very common in mainly thoroughbreds. This guy has what’s known as a sacralised lumbar aswell as sacral spurs. The sacralised lumbar I believe is a heritable trait although there has been no study it is in humans inherited through genetics from parentage. In my opinion the sacral bone spurs are from early hard work when the growth plates between S1 and S2 are still open. The sacroiliac joint is made of two parts and if under load grows osseous bone to strengthen the area and can fuse to the pelvis.
In my opinion sacralised lumbar is a major limiting factor for performance as it appears to compromise the function and mobility in the hind end. These horses are very stiff and do not track up. They can’t take weight through the hind end joints well and have trouble engaging the pelvis. Secondary compensation is often an issue that goes along with this.
I’ve heard multiple stories now that insurance companies are not paying out on horses diagnosed with ECVM because it’s not an injury but an inherited trait that can limit performance. So it leads me to ponder….. how many heritable traits will strike off insurance claims in the future with further study into skeletal variations/malformations. Will this push breeders to think more seriously about skeletal conformation? Will insurance companies lead the charge on researching the limitations of these skeletal variations? Will genetic testing for heritable skeletal traits be the future of breeding horses for optimal soundness? Don’t forget that the gene for kissing spines has recently been found, will horses with kissing spines now be considered a heritable trait and not an injury.
Will this void insurance claims?
I have put together a video on my patreon page to explain further.
https://www.patreon.com/posts/skeletal-in-hind-111909060?utm_medium=clipboard_copy&utm_source=copyLink&utm_campaign=postshare_creator&utm_content=join_link
