10/13/2025
Updated tongue picture xx
The Equine Tongue
So, I am slightly obsessed about the equine tongue, how it functions the relationship between the mind and how the position of the tongue is dictated by the emotional side of the horse and the mechanics of the relationship of the tongue and the rest of the body
Now we have many generic posts about connections throughout the body, but I am going to cover in a slightly unique way, we know of the connection through the body right through to the hind end, I personally tried to move the hindlimb and could feel the restriction and wether bitted or bitless they all have their own unique restriction
The tongue is made up of 12 muscles and that can conjure an image of one tongue made up of 12 parts and while the tongue does have specific muscles within it when we look at the 12 pairs this is the tongue and its connecting muscles, I will be honest I am the type of person that is not satisfied by just saying there are 12 I want to know what are they and what they do in relationship to the tongue, for we need to know right especially when thinking of how much we influence the tongue
So first of all I apologise to all the people I have messaged and bugged asking do they know every muscle because I knew of 8 but and only four of them originate and insert within the tongue the rest do not have both origin and insertion within it so (and I may be wrong) for me saying it's made up of 12 muscles could be misleading the layman to thinking they are 12 parts to the tongue, and I am not saying I am right and if anyone knows more then please educate me so I cannot wake up at 2am thinking about it lol, I want to thank Sharon May Davies for taking the time to answer my message and it prompted me to share this post again
So, with that I will tell you what I know about the tongue's anatomy
Although it is a muscle it is not like say a biceps think it more of a muscle that continually works but does not grow in size the more it is worked (for we know to build muscle we cause micro tears and movement does not do this in the tongue) its job is to aid in digestion, taste perception, respiratory function, the intrinsic muscles are within the tongue and the extrinsic muscles are connected via muscles to the hyoid, mandible, soft palate, pharynx, it has a healthy blood supply and is innervated by nerves such as the Hypoglossal, Vagus, Facial and Trigeminal
INTRINSIC MUSCLES
There are four pairs of intrinsic muscles which originate and insert back into the tongue, intrinsic means closer to the body and these muscles help with the shape of the tongue and positioning the tip of the tongue and work together with the extrinsic muscles for things like eating, swallowing etc
These four pairs are named the same just the directional term changes, so we have the SUPERIOR (shortens, widens, and curls the tongue upwards), INFERIOR (shortens, widens, and curls it downwards), TRANSVERSE (elongates) and VERITCAL (flattens) longitudinal muscles, they originate and insert into the structures within the tongue
EXTRINSIC MUSCLES
Extrinsic means further away from the main body and often the origin will be from outside the tongue, and they will insert into the tongue they are associated with more of the mechanical movement of the tongue (protruding, elevating, depressing, retracting), just a side note both intrinsic and extrinsic act together for correct function
STYLOGLOSSUS origin stylohyoid bone of the hyoid, action retracts and elevates the tongue
GENIOGLOSSUS origin incisive part of the mandible, action protrudes and depresses the tongue
HYOGLOSSUS origin basihyoid of the hyoid, action retracts and depresses the tongue
PALATOGLOSSAL, (GLOSSOPHARYNGEAL) This is a muscle of the soft palate and pharynx it assists in elevating the back portion of the tongue
MUSLCES AFFECTING THE FUNCTION OF THE TONGUE
THYROIDHYODEUS, this muscle will draw the tongue caudally by the attachments from the basihyoid
MYLOHYOID, this is a muscle which forms part of the floor of the mouth and the tongue sits in it like a cradle, with its links to the hyoid it affects movement with the tongue
GENIOHYOIDEUS, origin incisive part of the mandible, now even though this does not insert into the tongue it lies below it and inserts into the hyoid so when the hyoid comes forward it also affects the tongue and brings the tongue forward
OMOHYOIDEUS, origin subscapular fascia and even though it inserts onto the basihyoid bone that has a direct action on the tongue
STYLOHYOID the action of this results in the elevation of the base of the tongue
STERNOHYOID like the omohyoid it links the shoulder to the hyoid but also, we have the link between the hyoid and tongue
So, as you can see these are only a handful of muscles either in or surrounding or connecting the tongue to other structures
So why bother to know is not just easier to say there are 12 muscles of the tongue well like any muscle to know the action and how we may help or even how we may hinder we need to know the anatomy, for we may wiggle jiggle and do all sorts without knowing what we are influencing
We often talk about the connection of the tongue to the hind end or front end through lines, chains or any of the other connectins but it’s the freedom of choice for the horse as we know the tongue has a relationship with posture but it’s the brain which dictates the position of the tongue due to how the horse is feeling, we all know in humans we will place our tongue for helping maybe TMJ dysfunction but for anyone like me who suffers with TMJ pain or dysfunction trying to make it better with tongue exercises can actually cause us short term discomfort for the long term gain as dysfunction is our comfort zone, we often use the tongue as an avenue to effect something else without considering how important the tongue is in its own right
For me personally a happy horse has a still tongue, take a look at when we are working on horses the horses that are curling, fidgeting, or gurning with their tongue often tells us that there is pain or discomfort somewhere else yet we are often encouraged to see horses do all this with a bit in their mouth shouldn't an accepting mouth be a quiet mouth, we shut their mouths up to put a plaster over the issue and I cannot think of anything worse than when the horse is trying to find comfort in movement we then address the issue by shutting it up rather than asking why, when we think of respiration the tongue plays a crucial role, and where the tongue sits is so important so we have to be careful that we do not have an action that may affect this
In summary the mental well being of the horse affects the tongue which affects posture so as always we have to think of brain and body when approaching whole horse health
And if you are one of those people who want to know why and not just because it is then please if you know more muscles that I may of missed out I have no issue with being educated lol and you can join the long list of people I bug with weird questions about the horses body
We must always remember not just to manipulate a tongue or head position to get a "release" we need to ask was the horse simply avoiding pressure and because then the horse was simply releasing stress that our hands caused
I also apologise it for being so long this is the shortened version