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Winter Newsletter 2006

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Equine Design

Case History Muscle Focus Discipline Focus Tack Focus Science Focus
Dropped Pelvis Brachiocephalicus Muscle The Jumping Horse The Pelham Bit Inside The Muscle Cell

Equine

Case History
Dropped Pelvis
I was asked to take a look at 'Myra', a 14.1 part bred Arab mare.
Her owner reported that during the previous 6 months, Myra had been progressively faltering in her schooling work; resisting upward transitions into, falling in on the right rein, snatching at the bit and unable to maintain a steady pace.
After various questions and track checks, the problem revealed itself.
Myra's conformation presented a pelvic structure that appeared uneven and misaligned. Her offside pelvic arrangement was an inch or so lower than the nearside.
As drastic as this sounds, it is surprisingly not confined to rarity. Any horse working and living within human domestication can fall victim to this condition. However, the influencing factors leave some horses more vulnerable than others.  
The Pelvis, Sacrum and Sacroiliac Joint

The sacrum is a triangular type shaped bone composed of 5 vertebrae that fuse together when the horse reaches between 4 - 5 years of age.   

Integrated into the pelvic girdle, the sacrum forms a skeletal link between the hindquarters and the horses back.  

The lower aspect of the sacrum has a sacral vertebra on either side forming a Synovial joint, often referred to as the 'sacral wing’.
The underside of each sacral wing unites with the Ilium bone of the pelvis to form the sacroiliac joint.
The sacroiliac joint is a Synovial and fibro-cartiloginous joint that creates the meeting point of the pelvic girdle and the vertebrae column.   
The primary role of the sacroiliac joint is to provide stability for both the vertebrae column and the pelvic girdle; subsequently there is little flexibility within its physiology.  
The Pelvis, Sacroiliac Joint and The Horses Locomotion 

Energy and movement generated from the hindquarters relies upon the sacrum and the sacroiliac joint to transmit its forces through to the horses body and forehand. 

The gaits of walk and trot protract the hindlimbs alternatively, this action and energy is received and transmitted by the sacroiliac joint.

The gaits of canter and gallop as well as jumping protract the hindlimbs together, this action and energy is received and transmitted by the integrated workings of the sacroiliac joint and lumbosacral joint that work together to rotate the pelvis.  

Signs Of Sacroiliac Strain
A strained sacroiliac joint will have its structure weakened, either immediately or progressively over time, depending upon the severity of the strain. Consequently, the sacrum's' ability to support the pelvic girdle becomes inhibited.   
If the sacroiliac structure continues to weaken, the 'tuber sacral' (point of croup) and the 'tuber cocoxae' (point of hip) can sometimes rotate, falling into misalignment. This is detectable when viewing the pelvis from behind, the injured structure will present itself with one hip lower than its should be.   
In addition to this, when the horse is lead out in hand, he may also present a loose or unsupported locomotion originating from the hindquarters, often dragging the hind toe of the strained limb.  
During ridden locomotion, the horse will often hold his tail over to the strained side, while also demonstrating an inability or resistance to engage his hindquarters. The overall locomotion will be abrupt and stiff with disunited strides and comparative lameness in relation to the severity of the strain.
All this pain and discomfort will be radiate through the back; subsequently extreme sensitivity of the lumbar region can be detected, often promoting a hollow back action coupled with the neck stretched high above the bit as the horse tries to relieve and stretch out his pain and tension. Other horses will try to stretch out the pain and tension by leaning heavily onto the forehand and into the bit. either methods of relief will over time encourage a locking of the lumbar vertebrae.
This can proceed to negatively influences the horses cranialsacral system, seeing the horse begin a new action of biting at the bit in efforts to relive poll tension. (diploma course)
Whichever method of relief is demonstrated, the horse may also 'fall in' on the rein that is stretching the affected side of injury, while continuing to enhance the pelvic malfunction and promote imbalances within the cranialsacral system.
Causes and Influencing Factors
* Worked too hard too young
* Weak back
* Long back / loins 
* Weak muscular strength of the lumbar region  
* Weak ligament structure of the lumbar region  
* Weak skeletal frame of the lumbar region  
* Slipping
* Falling
* Twisting / rolling over object
* Jumping incorrectly
* Soft ground / uneven going
* Deep ground
* Repeated experience of poor rider posture  / balance - made worse when the rider is 'under- horsed'.
* Poor saddle fitting
* Poor harness fitting
Equine Massage Therapy and Sacroiliac Strain 
With respect to the interactive workings of equine massage therapy and the physiology of the sacroiliac joint, equine massage therapy needs to be applied in a progressive and intellectually devised form, customised to each horses individual needs and dictations. 
In this specific case, the chiropractor and myself worked together to harmonise our treatments in order to benefit from their individual and collective effects.
After the initial assessment involving the horses age, lifestyle, tack, working discipline, conformation and specific influences, the first stage is implemented. (this is a non comprehensive account)
1st Stage
Detection of  muscular tension  in the immediate, compensatory and referred muscles, ligaments and associated fascia planes
Example of muscles and fascia planes
* Medial gluteal muscle - deep layer  
* Deep gluteal muscle - deep layer (major stress point muscle)  
* Longissimus dorsi - deep layer (major stress point muscle)  
* Transverse abdominal muscle - deep layer  
* Internal abdominal oblique muscle - deep layer  
* Superficial gluteal - superficial layer  
* Tensor fascia latae - superficial layer (major stress point muscle)  
* Bicep Femoris
* Semitendinosus - superficial layer
* Semimembranosus - superficial layer
* Caudal dorsal serrate  -superficial layer
* Sacroiliac ligament
* Supraspinious ligament
* Nuchal ligament
* Gluteal fascia plane
* Thoralumbar fascia plane
* Latae fascia plane
* Abdominal fascia plane
2nd Stage
Myofascial therapy to release adhesed fibres, thus releasing their holding pattern on the associated muscles, ligaments and skeletal structure 
3rd Stage
Relaxation of muscles and ligament structures
4th Stage
Release of stress points
Release of trigger points
5th Stage
Work with the horses own accepted though incorrect form of locomotion through the laws of the proprioceptive sense, allowing a new recognition of locomotion to enhance the new muscular tone, strength and positive development.   

The horses loins require a balanced form in harmony with the structures that they support. Over developed loins will create a line of tension within their supporting structures.  

In this case, the off-side hamstring muscles, hindquarters and loins were in a poor and weak condition; while the near side hamstring muscles, hindquarters and loins presented an incomparative state of over-development. This was particularly obvious with the poverty line seen running between the Semitendinosus and Bicep Femoris.   
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The Jumping Horse
The horse is not physiologically designed for jumping!  
Naturally, the only reason a horse is able to jump is for its own survival in the wild.  

Jumping is an unnatural action for the horse, and subsequently, the horse has failed to evolve with the physical influences to incorporate jumping as an everyday activity. 

Small lower limbs, an inflexible spine, a heavy forehand (designed for pulling the hindquarters in the wild), long neck with a comparatively large heavy head as well as visionary inhibitions do not equate to the physical ideals required for jumping.  

Couple this with the weight of the rider and the restrictions of tack, we can begin to understand just how the show jumper will naturally develop various muscular stresses.  
Muscular Stress and The Jumping Horse
In order to perform a jump, the horse prepares, enters and completes 5 separate phases of physiological demands. Lets take look . . 
1 - Take Off 
Requires flexion of the lumbar region, hindquarters and stifle to enable the recoiling and lowering of  the hindquarters; providing the means for concentrated energy that will propel the up and over the forthcoming jump.  
The primary muscles used in take off are:
* Rhomboid - raises shoulder
* Thoracic and Cervical Trapezius - raises shoulder
* Brachiocephalicus - raises forelimb
* Long digital flexor - flexes the hoof  
* Long digital extensor - extends the hoof  
* Semimembranosus - flexes the hip
* Semimembranosus - flexes the hip
* Iliacus - flexes the hip
* Tensor Fascia Latae - flexes the hip / extends the stifle
* Bicep femoris - flexes the stifle and hock 
* Belly of bicep femoris - flexes the stifle and hock 
* Superficial gluteus - extends the hip
* Gluteus - forward propulsion 
2 - Stretching over the jump requires the horse to lower his head in order to raise his withers, while at the same time flexing his hocks and extending his forelimbs journey over the jump.  
The primary muscles used for stretching over a jump are:-   
* Brachiocephalicus muscle - provides lateral flexion of the neck and assists with the raising of the shoulder and forelimbs
* Thoracic Trapezius - provides forelimb protraction
* Sternothyrohyoid and Omohyoid muscles - provides lateral flexion of the neck while allowing the head to rotate in the opposite direction
* Longissimus dorsi - (see summer newsletter 2005) - extends the back and provides lateral flexion
* Iliocostalis dorsi - provides continued lateral flexion of the trunk derived from lateral flexion provided by the longissimus dorsi
* Gastrocnemius muscle - hock extension and stifle flexion allowing the hindlimbs to kick out so that they may clear the jump  
3 - Landing from the jump exerts a great deal of immediate stress to the tendons, ligaments and muscles of the forelimbs, shoulders, chest, neck and back  

As the horse lands, the leading forelimb makes ground contact establishing the horses balance and support, followed by the immediate impact of the preceding forelimb

Meanwhile, the hindlimbs are independently folded up under the horses body before impacting the ground one by one following the forelimbs
As the last hindlimb establishes ground contact, the leading forelimb will have already pushed off for the getaway phase. This places a great deal of tension and stress to the leading forelimb, its respective shoulder as well as the caudal and cranial aspects of the chest
If the horse lands with the forelimb too far forward, the toe turns up leaving the heel to make the initial ground contact. 
This will proceed to abruptly stretch the deep flexor tendon; a common experience with horses whom present poorly aligned, weak or long pasterns
The primary muscles used in landing are: 
* Upper triceps - flexes the shoulder joint
* Lower triceps - extends, stablises and supports the elbow joint
* Supraspinitus muscle - extends the shoulder while providing support and stabilisation
* Infraspinitus - assists the supraspinitus muscle while abducting the shoulder
* Cranial superficial pectoral muscle - adducts the forelimb  
* Caudal superficial pectoral muscle - retracts the forelimb to its former stance  
* Spinilus dorsi muscle - extends the back  
* Longissimus dorsi - (see summer newsletter 2005) - extends the back and provides lateral flexion
* Iliocostalis dorsi - provides continued lateral flexion of the trunk derived from lateral flexion provided by the longissimus dorsi
* Brachiocephalicus muscle - provides lateral flexion of the neck and assists with raising of the shoulder and forelimbs
* Sternothyrohyoid and Omohyoid muscles - provides lateral flexion of the neck while allowing the head to rotate in the opposite direction
Massage and The Jumping Horse
The unnatural act of jumping along with its physiological demands denotes that the jumping horse remains vulnerable to the development of cranialsacral imbalance as well as one sided development. Looking at the working roles of the primary muscles along with their tendons and skeletal attachments, you will be able to see how a domino effect, effective in both a positive and negative pattern is so easily created; one of which will proceed to radiate good health or line of stress and tension. (Ref: student papers - stress point cycle / diploma course - myofascial release / cranialsacral therapy) 
Therefore, effective and respectively applied equine massage therapy needs to be applied to the entirety of the jumping horse, with additional emphasis upon the primary muscles, cranialsacral system and the sources and progressive influences active within any one sided development.  
Subsequently, the equine massage therapist needs to advise the owner / trainer on the sources, progression and maintenance of each horses muscular health so that appropriate actions may be implemented by the owner / trainer in the horses day to day to day care, tack, handling and riding so that the respective massage and myofascial therapy previously applied is still of continuing physical and emotional benefit to the jumping horse.
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The Pelham Bit
The rider of the horse working in a pelham bit needs to understand how the bit is working and why it is being used.  
Sadly, many horses are ridden in the pelham so that they are able to present a false representation of the desired neck outline described as being 'on the bit'.

For any horse to work 'on the bit' requires an unhurried learning process for the horse with unhurried, sympathetic and intellectual teachings from an experienced rider.

The trained eye can easily differentiate between the horse who is working in communication with his rider and the horse who is being leveraged into a detrimental neck outline derived through the effects of an incorrectly used pelham bit. (Ref: student papers - stress points and the dressage horse)
How The Pelham Bit Works (Ref: foundation course  - module III)
There are many variations of the pelham bit family, including the 'scamperdale', 'kimblewick' and 'half-moon mullen', all of which respectively integrate the workings of both the snaffle bit and the curb bit. 
Most basically speaking, the pelham bit works by creating a severe leverage action upon the bars of the horses mouth and tongue that then radiates pressure upon the poll, through the neck where it then radiates through the cranialsacral system.  
The upper section of the pelham creates the kinder snaffle action, while the lower section of the pelham creates the more severe action of the curb bit.
While both sections have their own reins, the pelham bit should only be ridden from the snaffle rein, only utilising the curb rein with the riders intellectual awareness and targeted reasons for doing so. 
Subsequently, each horse will present personal levels and forms of stress derived from the pelham bit dependant upon its own physiological state of health. e.g. natural flexion, muscular health, myofascial health, cranialsacral balance together with the understanding of the riders aids 
The Pelham Bit and Muscular Complications
Many people have been bewildered saying, "How can a bit create muscular implications"? Well, I will often get right to the root of the problem and proceed to add more bewilderment before I answer by suggesting that the horses cranialsacral system and myofascial network also remain under severe threat of malfunction.
The problem lies in the complete contradictions of the horses physiology and the working effects of the pelham bit when used incorrectly.

The horse that has been trained to communicate and work in unison with his rider, and over time will have learnt to move in new ways away from his natural instinctual actions and adapt accordingly, allowing the horse to work with impulsion, rhythm and balance generated from his powerful hindquarters to be received by a light, flexible and receptive forehand. 

The horse will have learnt to utilise his power to serve as a form of propulsion to push his movement forward, and, only when the horse has learnt these techniques will he naturally raise his neck, flex at the poll (Ref: diploma course - cranialsacral therapy) at the first cervical vertebrae, while still maintaining and working with flexion and free movement. 

This blend of harmonious communication between rider and horse presents the most desired outline the horse and rider can achieve,

and horses whom have not experienced the above teachings and understanding will often attempt to achieve the false neck outline courtesy of the pelham bit, minus flexion, elasticity of movement and mutual communication with the rider.

Subsequently, the horse will achieve the raised arched neck and tucked in head by being leveraged from the 5th or 6th neck vertebrae
The implications of this serve to directly affect the following muscles and soft tissue structures: 
Primary Muscles:
* Rhomboid muscle - absorbs tension from the nuchae ligament subsequently inhibiting foreleg protraction
* Brachiocephalicus - lateral neck and head movement / assists with raising the neck
* Splenius - Lateral flexion of the head
* Rectus capitus muscles - flexes the head at the poll
* Sternothyrohyoid and Omohyoid muscles - lateral head movement
* Longissimus Dorsi - extends back muscles and transmits  energy as well as tension
* Spinalis Dorsi - back extension and absorbing tension in the neck cervical vertebrae proceeding to inhibit spinal flexion
Ligaments:
Nuchae ligament - supports and absorbs tension created within the neck muscles and thus dictating its abilities of flexion 
Supraspinous ligament - supports and absorbs tension derived from the nuchae ligament as well as absorbing tension within the back and thus dictating its abilities of flexion 
Sacroiliac ligament - supports and absorbs tension derived from the nuchae and Supraspinous ligament as well as absorbing tension within the lumbar region and thus dictating its abilities of strength, action and flexion 
Structures:
Hyoid Apparatus - connects the tongue to jaw muscles to caudal aspect of the skull to the brachiocephalic to the sternocephalic - to the poll to the nuchal ligament to the cervical and thoracic serrate muscle down to the muscles of the sternum and shoulder.
Thus the horses general forehand locomotion may seemingly fall out of rhythm leaving compensatory muscles to realign his centre of balance, and there begins a whole new series of muscular stress.
Psychological Implications  (Ref: student paper  - the tense horse)
Horses are not born with bad mouths; they are developed by careless riders, rough green riding and handling, coupled with thoughtless biting. Horses unfortunate enough to be ridden incorrectly with the pelham bit will often be in some form of discomfort. subsequently, this naturally promotes the horse to behave in a tense manner of unease and resistance, prompting a vicious cycle of muscular stress - trigger points - pain/discomfort - anxiety - muscular stress - trigger points - more pain/discomfort - more anxiety and so on.
Equine Massage and The Pelham Bit

Horses being assessed for equine massage therapy, must always have their tack taken into account. Most horses ridden in a pelham bit will have muscular stress present in both the directly and indirectly affected muscles.

Subsequently, the indirectly affected muscles, ligaments and fascia planes will radiate their tension through the entirety of the horse, ultimately leading the horse to present complications in his locomotion and behaviour that would seemingly have no relationship to the 'bit'.

An intellectually devised programme of craniosacral, myofascial and specific muscular release will work to psychologically relax the horse, allowing ideal conditions for the proceeded targeted therapy.  

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The Brachiocephalicus    (Ref: student papers - stress point cycle)
The Brachiocephalic muscle is a real multi-tasker, initiating a host of varied muscular workings, and thus remains vulnerable to many sources and forms of muscular stress. Subsequently, when thus muscle experiences stress it will proceed to inhibit a many forms of the horses locomotion and working ability.

Location - Situated within the superficial muscle layer running down either side of the neck

Origin - First cervical vertebrae at the base of the skull (correct flexion point for horses 'on the bit - see pelham bit)

Insertion - Point of shoulder (top of the humerus)

Workings
The Brachiocephalic muscle works with the Splenius muscle to both balance the horse before the horses neck is turned into the contracted side (lateral flexion)
The Brachiocephalic muscle will simultaneously contracting to raise the scapula before working with the Supraspinitus and Infraspinitus muscles to initiate forelimb protraction, retraction, abduction, adduction and stability
Associated Implications 
A loss of lateral flexion in the neck
A loss of rhythm, power and co-ordination of the forelimbs
Disunited paces
Inability to balance effectively
Shortened, abrupt strides - increasing concussive forces
Leaning on the forehand in attempts to stretch out the tension - this creating consequential muscular stress in the compensating muscles
Inability to jump, stretch and land effectively.
Anyone of these associated implications will bring with them their own origins of muscular stress with their patterns of radiated tension and compensatory consequences.
Massage and The Brachiocephalicus
Being host to one of the 7 major recognised stress points, the Brachiocephalic muscle is usually guaranteed to be housing some form of stressed within the working or even retired horse.

A stressed or strained Brachiocephalicus will create immediate, progressive and / or consequential effects, individually and collectively affecting the horses physiological and psychological well being.

An assessment of the horses working discipline, life style, tack, gait analysis and character provides a good insight into the possible causes, creations and continuing patterns of stress either present or threatening to this major muscle.

Being one of the bigger muscles, its compensatory affects are vast and rapid, often dictating the need for additional treatment to the associated tendons, ligaments, fascia planes and often cranialsacral imbalance.  
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Inside The Muscle Cell (Certificate Course)

Looking inside a muscle is rather like looking into a miniature world complete with its own army, inside their own barracks with the soldiers harmoniously communicating and working within its effective laws of 'cause and effect'.

Although seemingly complex at first sight, it soon becomes clear just how logical though powerfully effective (positively and negatively) a muscle is.
Massage and The Muscle Cells

Recognising the cellular level of the muscle is equally important as recognising the more superficial level. 

When you apply massage applications and techniques to a muscle you are dealing directly with the bulk of the muscle; the tissue mass with its various fluids, its tissue density.

Muscle cells are composed from 'cytoplasm', a gel type substance both in its composition and reactive behaviour. 

When the muscle cell is exposed to times of inactivity, it becomes taught and dense in its composition; and when exposed to times of activity, it becomes fluid and pliable in its composition - a process is referred to as 'Thixotrophy'.

Being able to recognise and understand the behavioural traits of the muscle cell enables you to intellectually apply equine massage therapy in order to positively influence negative activity such as muscular tension and myofascial restriction and in each muscle. 

Subsequently, deep massage techniques involving compression, stretching and twisting will help to initiate and promote the 'Thixotrophy' phenomenon, promoting the muscles more receptive state for positive results offered through equine massage therapy.

With water being the main component of gel, the cells are very effective at conducting electricity. Subsequently, nerve impulses are more effectively received and transmitted when communicated through a soft pliable muscle. This principle allows many cases of referred neural pain often present within the internal organ cavities (Ref: diploma course) to be eradicated at their root cause.

By understanding the muscle from its basic cellular level allows you to recognise root causes of many problems and disguised presentations, allowing future and targeted treatment to be effective minus the negative influences created by at cellular level. 
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