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Do Horses Actually Have Knees?

January 7, 2023

Referring to this joint as a knee is anatomically, functionally, and mechanically incorrect. What is the anatomy of the equine “knee”, how does it differ from an actual knee, and how can it possibly be a…… wrist?

What do you mean it’s not a knee? Of course it’s a knee… Well, anatomy means everything when trying to understand the motion of a joint, and what role it plays in overall body movement. Let’s dive into the anatomy of the “knee” and see why it’s wrong to refer to it as a knee, in the first place.

First let’s look at the anatomy of a knee. We will compare the human knee to a horse’s “knee”. If I ask you to tell me what motion occurs at your knee, you would say something like, “bending” or “flexion and extension”, both of which would be correct. Our knee, is considered a modified hinge joint. So you can think of your knee like a hinge on a door, as it only swings in two directions, forwards and backwards. That’s because our knee is primarily made up of two big bones, the femur (that runs from the hip joint to the knee joint, and the tibia, which runs from the knee joint to the ankle joint. Yes, there is a third bone there, called the fibula, which parallels the tibia (actually attaching to it below the knee joint), but it doesn’t play a role in the hinge motion of the knee itself.

Now, the main feature of the human knee, that we don’t have on any of our other joints, is the knee cap (aka the patella). This bone, that is structurally a part of the quads muscle group, slides up the knee joint during extension of the lower leg, and down during flexion. Take a look…Is there a patella on the front legs of your horse? No there is not. And in order for a joint to be considered a true knee, it must have a knee cap. So, which joints on the horse are considered its true knees? If you answered, stifles, then you would be correct! The knees of the horse are actually its stifles! You probably are realizing now that this makes perfect sense.

Here’s another way to make sense of this. We know where our horse’s shoulders are, right? At the top of the front legs, of course. Then the next joint moving down the leg, is the equine elbow. So working our way down further, does it make sense to have a shoulder, elbow, and then a knee? No… We have a shoulder, an elbow, and then a wrist. It’s the exact same situation with your horse. In fact, in veterinary terms, the joint that we commonly refer to as a knee, is called the “carpus”. And carpus is the latin word for wrist. Makes you wonder where the term, knee, came from.

I bring up the point about this terminology because unless you know what joint you’re working with, you won’t be able to stretch it properly. The vast majority of the time when I see people stretching the front limbs of their horses, all they do is stretch the shoulders. And even then, it’s done mostly into extension. The wrists are rarely ever stretched and loosened properly. Personally I believe that is because we refer to the wrists, as knees. And in doing so, we conclude that it’s just a flexion and extension joint. Now look at your own wrists. Do they just flex and extend? Of course not. They flex, extend, laterally and medially flex, and circumduct (which is to rotate in a circular motion). Your horse’s wrists can do the exact same thing. Only the circumduction is slightly less in the horse.

Of course the primary function of the horse’s wrists is to flex and extend. However, without proper function of the accessory motions, flexion and extension will be reduced. The accessory motions are the rotation, lateral bending, and circumduction. If these motions were not present, your horse would walk like a toy soldier. The accessory motions allow your horse’s lower leg to rotate or “swing” out while it flex and extends. Thus there is a flow or fluidity to the motion, rather than a purely mechanical or robotic feel to it. It is my personal opinion, that it’s these accessory motions, that cause the vast majority of movement issues that arise from the legs. So we must address them during our warmup and stretching routines!

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I hope that you have enjoyed this article! If you have any questions about this information, or to schedule a chiropractic adjustment for your horse(s), please contact us at 602–726–5186, or email us at office@www.sporthorsechiropractic.com. You can also find us on Facebook, Instagram, Youtube, and Twitter.

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*This information is intended to be used for information purposes only. Only a trained, certified animal chiropractor or veterinarian should perform chiropractic adjustments on your animals. If your animals are experiencing medical problems, please contact your veterinarian.*

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Dr. Alex Micek

Dr. Alex Micek was born and raised in Osceola, Nebraska. She grew up on a the back of a horse and began showing quarter horses in multiple all-around events as an active member of the American Quarter Horse Youth Association. She became more interested in roping, running barrels, and goat tying and convinced her mother to travel across the state of Nebraska to the high school rodeos.

She received a rodeo scholarship from Oklahoma Panhandle State University where she went on to rodeo at the collegiate level for four years. She earned her bachelor degrees in biology and animal science. During this time, she accomplished many qualifications to the American Quarter Horse Association World Championship Show in Oklahoma City in breakaway, heading and barrel racing with many top 10 finishes.

Dr. Alex had her equine athletes adjusted during the rodeo seasons and was amazed by the benefits and relief it brought to her horses. She was intrigued by the importance of the chiropractic adjustment. From then on, her passion was to become an equine chiropractor.

Dr. Alex attended Parker University in Dallas, Texas, earning her Doctorate of Chiropractic as well as completing the American Veterinary Chiropractic Association certified course in Animal Chiropractic at Parker University.

Dr. Mike Adney

Dr. Mike is a retired military veteran. He served in the U.S. Air Force as an F-16 Avionics Technician, and then in the Coast Guard as a helicopter pilot. During this time he obtained is Bachelor’s Degree in Professional Aeronautics with minors in Aviation Safety and Business. After he was retired from the military, he started his own business teaching senior citizens basic computer skills and repairing their computers. He happened to join a business networking group where he met a chiropractor that changed his life. Now he provides chiropractic care with the hopes of doing the same for others.

Dr. Mike Graduated from Southern California University of Health Sciences with his Doctorate of Chiropractic in 2016. While he was in school, he was introduced to an amazing person, who had been doing Chiropractic on horses for the past 40 years! Intrigued by the thought of adjusting horses, Dr. Mike decided to find out what he had to do in order to become a horse chiropractor. So in 2015, he attended Options for Animals, an animal Chiropractic certification program.

Upon graduating from the program, Dr. Mike passed the IVCA certification exam, which certified him as a member of the International Veterinary Chiropractic Association, the largest animal chiropractic certification in the world. Being a member of the IVCA ensures that Dr. Mike is always up-to-date on the latest methods and research pertaining to equine Chiropractic.

Dr. Mike’s passion is adjusting performance horses. Realizing that all professional sports teams have chiropractors on staff, and that the Chief Medical Officer for the 2016 U.S. Olympic team was a chiropractor, it became immediately obvious how important it is for performance animals to get adjusted as well. After all, the stresses that a performance horse’s body undergoes is arguably as much, if not more than that of a human performance athlete. After becoming an authorized equine chiropractic vendor at Westworld of Scottsdale, AZ, and providing equine Chiropractic care for those horses, it became clear that the horses needed what he does. The competition results along with the responses of the riders and trainers, confirmed that equine chiropractic is indeed a service that is desperately needed to keep performance horses functioning at their best!

Dr. Mike has a mobile equine practice which is based in Phoenix, AZ; however, he routinely travels long distances to manage the chiropractic care for his clients and their animals. He also enjoys traveling to horse shows and adjusting performance animals during their competitions, to ensure that their structure is in an optimum position to enable them to compete and perform at their best!