resourcesABOUT MT AUTHOR GUIDELINES CLASSIFIEDS EDITORIAL CALENDAR MEDIA GUIDE MASSAGE MART SCHOOLS & EDUCATION FEEDBACK
Acupuncture Ambassadors: A Chat with Leader Anthony M. Giovanniello, MSAc,LAc
When you first meet Anthony Giovanniello, you realize he's a humble practitioner, yet is bursting with a type of dedication that you can't help but be overwhelmingly inspired by.
Giving Testosterone Levels a Boost (Part 3)
Since testosterone and insulin status are inversely correlated, it's important to keep insulin low so testosterone will remain high.
Peer Points: Spreading The Word
Pedram Shojai describes his venture into Traditional Chinese Medicine as a journey led by various "mystical experiences." Shojai decided to change the course of his career when he looked deeper into the basics of TCM.
Grape Seed Extract: A Multifaceted Herb for Promoting Healthy Circulation
One of my favorite herbs is grape seed. Modern research has identified some intriguing health benefits attributable to the seed of this ancient fruit. I particularly use grape seed as an extract standardized for OPCs (oligomeric procyanidins).
Gallop Confidently Into The New Year
Happy New Year! As you may know, this is the year of the Wooden Horse. I received a wonderful gift for Christmas. It is a beautiful glass sculpture of a horse, by Luili Gong Fong, a Chinese artist.
Asymmetrical Pronation: Effect on Adjustments
When your patients don't respond as well as expected to their chiropractic adjustments, oftentimes there is a source of interference in the pedal foundation – asymmetrical pronation.
Managing Hallux Hypomobility Disorders (Part 2)
In part one of this series we discussed the unique properties and significance of the first toe in the propulsive phase of gait. In particular, we discussed the importance of the first metatarsophalangeal joint (MPJ).
Qigong to Empower Our Youth
Qigong is an ancient form of exercise and meditation used to promote longevity and health. This practice has traditionally been used by adults to balance the body through mindfulness, focused breathing and gentle movements.
Diagnosing Flexion-Intolerant Lower Back Pain (Part 2): Exercise Rehab
One of the things that has puzzled us for years is the presentation of the flexion-intolerant patient. We have realized there is a large overlap with sacroiliac indicators. In acute lumbar pain, the SI often twists, subluxes, goes haywire.
An Alternate Method For Choosing The Right Formula For Your Patients
A constant question for us in the clinic is when to make adjustments and when to stay the course. A patient comes in and says, "Things are the same as last week."
Embracing the Light
Four years, ago I was diagnosed with a labral tear in my hip that was excruciating and "required surgery" according to an orthopedic surgeon. I tried everything and although the symptoms had mostly abated, I had to give up Yoga practice and everything that could exacerbate the tear.
Don't Believe It
One of our staff came into my office last week, very concerned about an article she had just read on a news media website. The article suggested researchers found "no health benefits" associated with taking multivitamins.
Eucommia Bark Helps Maintain Strong Bones
Eucommia bark is a major tonic herb used in Asia, and now throughout the world, that supports and helps mend the skeletal structure and its related tissues. Eucommia bark is collected from Eucommia ulmoides trees that are more than 10 years old.
Common Disorders of the Temporomandibular Joint
The evaluation and management of craniofacial pain is a complex endeavor, which often encompasses the presence of temporomandibular joint disorders.
The Urinary Bladder Official
The Bladder Official is known as the Official Who Controls the Storage of Water. In Western medical terms, this organ collects the urine excreted by the kidneys.
Using Facial and Scalp Acupuncture To Treat Neuromuscular Facial Conditions
As a practitioner and instructor of facial rejuvenation acupuncture I have gotten many calls over the past 10 years from individuals seeking help for various conditions affecting the facial muscles, nerves, and overall function of the face.
Ever Heard of the Lateral Raphé?
We have all had acute patients enter our offices listing laterally to the side at the level of the lumbar spine or expressing pain on lateral lumbar bending.
News in Brief
Patriot Project: Serving Those Who Served; CTCA Chiropractor Receives Clinical Innovation Award.
The Importance of Staying Focused
Our world is so full of over stimulation and constant information. We live in a fast paced, ever-changing society. If you seek you will receive.
Weighing in on Weight Loss
If your practice trends anything like the U.S. population, you are probably noticing over two-thirds of your patients could benefit from weight reduction, particularly if their main complaints include chronic back or joint pain.
Gaining an Independent Occupational Code with the U.S. Bureau of Labor Statistics
One of the most important national activities currently taking place in relation to the development of the field of AOM profession is the Department of Labor's Bureau of Labor Statistics' (BLS) revision of the 2010 Standard Occupational Classification (SOC) system.
Preserving the Natural Resources and Culture of Chinese Herbal Medicine
As the world experiences unprecedented population growth and ever-increasing ecological pressures, the topic of preserving Chinese medicine's natural resources has attracted steadily increasing attention from practitioners.
The Deficiency Myth
If you went to the same kind of medical school I did and took the same kind of licensing exam I took, you were trained to seek out and expect to find primary deficiencies here in the U.S.
The Power of Words: DCs Share Drug-Free Approach
There's no doubt that words are powerful and important – especially in the chiropractic profession, where we have been struggling for years to find the right words to describe who we are and what we do.
VA Names Sites for Pilot Chiropractic Residency Program
The Veterans Administration has announced the five VA medical facilities that will serve as initial sites for the administration's recently established pilot chiropractic residency program.
November, 2008, Vol. 08, Issue 11
The Pressurestat Model Explains the Craniosacral Rhythm
By John Rollinson, D. Eu, CST-D; guest author for John Upledger, DO, OMM
The Pressurestat Model illustrates the mechanism behind the circulation of cerebrospinal fluid through the semi-closed, hydraulic craniosacral system.Originally defined by Dr. John Upledger and a team of researchers at Michigan State University in the 1970s, the model explains the palpable, rhythmic expansion and contraction of the craniosacral system.
The brain and spinal cord are surrounded by cerebrospinal fluid (CSF). This fluid transports nutrients, hormones and peptides. It removes metabolic waste and toxic substances. It serves as a shock absorber, floating the brain to counteract gravity. It even influences respiration and cerebral blood flow, among its many functions. Given all this, it's easy to see how essential it is for CSF to flow unimpaired. If an area of brain tissue is even partially deprived of optimal CSF motion and flow, that area will be forced into some degree of functional compromise.1
Cerebrospinal fluid is held within the dural membrane that surrounds the brain and spinal cord. This tough, watertight sac takes the shape of the interior of the cranium and intervertebral canal. Though dura mater doesn't stretch much, this fluid container is flexible and allows for CSF pressure changes. When pressure increases, the dural membrane expands, and the bones of the cranium and sacrum move along with it. When pressure decreases, the reverse occurs.
This filling of the craniosacral system is known as flexion, and the emptying is known as extension. During flexion, the head becomes wider transversely and shorter in its anterior-posterior dimension. The whole body externally rotates and widens. After flexion, this motion passes through a neutral zone on its way into extension, during which the head narrows and elongates and the whole body internally rotates.
Under normal circumstances, the craniosacral system proceeds cyclically through flexion and extension at a rate of about six to 12 cycles per minute. We can feel this rhythm at various places on the body because "this whole-body response is probably due to the pumping effect of the cerebrospinal fluid upon the motor system ... which causes a rhythmical tonification and detonification of the myofascial system in response to rhythmically fluctuating nerve signals."2
Tracing the Flow of Cerebrospinal Fluid Through the Craniosacral System
So, we have a hydraulic system that surrounds the brain and spinal cord. To understand how it is semi-closed, we must first understand how CSF enters and leaves the system. Within the ventricles of the brain, you'll find a capillary network - the choroid plexus - that produces CSF. In essence, blood circulating through the choroid plexus is "turned into" CSF, which then enters the craniosacral system.
The choroid plexus has stretch- and compression-sensing receptors within the saggital suture of the cranium. As CSF is added to the craniosacral system and its volume increases, the dural container expands, spreading the bones of the head. The parietal bones then move apart and spread the saggital suture. When this happens, the whole neuromechanism signals the choroid plexus to stop or greatly reduce the production of CSF. As the fluid drains from the system, the dura and cranium shrink and the parietals come together, compressing the saggital suture. The pressure-sensing nerve endings connected to the choroid plexus then send a signal to resume CSF production and the cycle repeats.
Normally, the system seems to operate on a cycle of about six seconds; CSF is produced for about three seconds and then production ceases for about three seconds. This creates the rhythmical rise and fall of fluid pressure within the system.
From the lateral ventricles, CSF enters the third ventricle via the foramina of Monro, then the fourth ventricle via the cerebral aqueduct. The CSF then enters the subarachnoid space and the central canal of the spinal cord via the foramina of Luschka and of Magendie, where it joins the CSF that is already bathing the brain and spinal cord, and all neural tissue enclosed by the dura mater. The fluid then circulates down and around the spinal cord and up and around the brain.
Cerebrospinal fluid passes out of the semi-closed hydraulic system via folds - called arachnoid granulation bodies or arachnoid villae - of the arachnoid layer of the cranial meninges that project through the inner layer of dura mater into the venous sinuses of the brain.3 CSF is reabsorbed into the venous blood through these arachnoid villae, which are primarily in the saggital venous sinous.
Although the rate of reabsorption is fairly constant, it seems to be regulated (think of a car idling) by a cluster of arachnoid granulation bodies found at the anterior end of the straight sinus. From its position at the "crossroads" of the intracranial membranes, this cluster can become aware of any tension within the membrane system and may regulate the outflow of CSF accordingly.
To summarize in a different way, the craniosacral system is like a leaking toilet with the tank cracked into pieces and lined with a giant exam glove (which is the dural membrane). The float-switch in the toilet tank is the saggital suture, which causes an inflow whenever enough water/CSF leaks away down the drain (sinuses).
Generating Whole-Body Effects
The craniosacral system is intimately related to the nervous, musculoskeletal, vascular, lymphatic, endocrine and respiratory systems. Just as abnormalities in the structure or function of any of these systems can influence the craniosacral system, abnormalities in or injuries to the structure or function of the craniosacral system can have profound and deleterious effects on the development or function of the nervous system, especially the brain.4
There are also ways in which the craniosacral system directly influences important, ongoing physiological processes. For instance, the continuing rhythmical movement of the system may serve to "milk" the pituitary gland and affect the neuroendocrine system. The rhythmic motion may also be an important stimulus for the development of the brain. Similarly, the motion around the skull sutures may pump the newly formed red blood cells out of the flat bones of the skull and into the general circulation.5
Of course, any abnormality of the craniosacral system could impact the body or any of its parts through the central nervous system. Any deficiency in circulation of CSF could affect brain and nerve functioning. Any restriction of nerves passing out of the craniosacral system due to restrictions in the cranial sutures or membranes may affect their end organs. Thanks to the Pressurestat Model, we can see why.
Click here for previous articles by John Upledger, DO, OMM.
John Rollinson practices full-time in Northampton, Mass., and at several school clinics in the area. You can contact him at www.rosetrust.org.
comments powered by Disqus