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News in Brief
Support of F4CP Continues With Latest Donations; Walter Reed Honors Dr. William Morgan; Recognizing 40 Years of Public-Health Activism; Allstate Decision Reversed.
Technology Meets Practice: Chiropractic Every Day
About a year ago, I had an interesting conversation with a DC who made house calls. When I asked why, she was quick to explain she learns much more about her patients when she sees them at home than she could ever observe in the office.
The Ethics of Herbal Prescribing
While teaching ethics classes, I often encounter licensed acupuncturists who are surprised that our use of herbs and supplements has a specific section in the material. It is often an aspect within ethics that clinicians don't think of in practice.
Exercise Recommendations for Healthy Aging
Aging is inevitable, but how you age is not. Common physical signs of aging include decreased muscle mass, decreased muscular power, increased body fat, and decreased aerobic (lung) capacity.
Patient Retention Techniques
When talking about techniques to grow your business, we tend to focus on the "large" aspect of the patient base, that is, on strategies to attract new patients. However, it is important to remember that "loyal" is equally, if not more, important.
It's Time to Wake Up
It is time for this profession to wake up and tell someone about the healing benefits of acupuncture. This is the time for Asian Medicine. Its popularity, growth and unusual acceptance is nothing short of amazing.
Treat Every Patient as an Athlete
Frontal-plane movement pattern dysfunction can set the stage for musculoskeletal injury. Frontal-plane stabilization is essential during the normal activities of daily living: think single-leg stance and gait cycle.
Making Public Health a Chiropractic Priority
As highlighted in this edition's News in Brief, Rand Baird, DC, MPH, FICA, FICC, editor and occasional author of our long-running column, "Chiropractic in the American Public Health Association", was recognized by the organization recently for 40 years of membership.
Online Marketing Basics: Website Creation
The various online marketing options make it a challenge, especially when all you want to do is help your patients feel better. With such a broad topic, I'm going to share some basics you should know about website creation.
Fish Oil: A Key Component to Positive Clinical Outcomes
Patients seem to be presenting with more complex problems, and many are responding to care more slowly or have completely unexpected results. Why?
Healing Trauma: Cultivating Resilience and Presence Through Mindfulness, Part 1
All humans, by the very nature of being human, will experience moments of trauma and suffering. What, then, makes the difference in how the individual who experiences trauma, suffering, and spiritual loss reacts to such experiences?
Lower-Extremity Overuse Injuries: Primer on Causes and Corrections
From ankle sprains to stress fractures, shin splints to plantar fasciitis, the research is clear: These common overuse injuries of the lower extremities – among dozens of others – may be related to abnormal foot function in your patients.
A War You Can Help Patients Win
The average American consumes approximately 60 percent of calories from sugar, flour and refined oils. A donut is a good example of a so-called "food" that represents these calorie sources.
Treating LBP in Golfers: Beyond Basic Assessment
The drive to master the most efficient swing demands a tremendous amount from the lower back. Maintaining stability in a flexed posture, supporting torso rotation and repetitively supporting the golf swing all put the lower back in a vulnerable position.
Relationship Marketing: A Modern Approach
Remember when you used to get real letters in the mail? Not the automated type, but the real deal, hand written with a personal message just because someone was thinking about you? You know what I'm talking about.
An Unexpected Superfood: All About Eggs
About 40 years ago, excessive dietary cholesterol was labeled a public health concern. Specifically, it was thought that there was a causal link between consumption of cholesterol-laden foods and increased risk of heart disease.
ICD-10 Is Not Scary (and Not About Billing)
In my 13 years of consulting with doctors on billing and coding matters, ICD-10 has aroused the biggest combination of misguided fear and ignorance I can remember.
What to do When Today Sucks
Have you ever had one of those days when nothing went the way it should have? The patient with migraines got worse instead of better from a treatment similar to one you've effectively used on him before.
Learning the Transformative Language of the Channel System: The Sinew Channels
The Chinese medical classics describe the energetic terrain of the body in much detail. The acupuncture channel systems, as presented in the Ling Shu illustrate the various expressions our qi energy can take.
Data: The New Frontier in Health Care
Your practice is empowered with the data you need to improve patient health, run a more efficient (read: profitable) practice, get paid in timely fashion and help show the efficacy of chiropractic on the national stage in the midst of sweeping changes in health care!
Integrative Sports Medicine
One of the most rewarding and challenging clinical scenarios is the treatment of athletes.
Peaching to the Choir: How to Extend Our Reach Beyond the CAM Community
Professional conferences offer unique opportunities to network, be exposed to cutting-edge innovators, share your interests and work, and be inspired.
Teaching Qi Gong to Children
Many of us have come to embrace Qi Gong or Tai Chi practice as a regular part of our lives. Qi Gong has been a stabilizing factor in my life for the last twenty years.
Acupuncture Treatment of Trauma in the Canine
From 1972 until 1976, John Ottaviano and I were treating dogs at five different veterinary clinics in the Los Angeles county area. Usually, we were at a clinic for seven to eight hours.
ASA Ready to Impact Profession
The American Society of Acupuncturists (ASA) is a 501(c)6 (pending), not-for-profit collaboration among state based, acupuncturist professional associations.
Healing the Core: AWB Nepal Earthquake Relief Project
With almost 9,000 people killed during the earthquakes in April and May, another 23,000 suffering injuries, hundreds of thousands left homeless when entire villages collapsed, and many sacred sites destroyed, no one in this country of approximately 28 million has been left untouched by the disaster.
Aetna Updates 97140 Policy
In a development the Association of New Jersey Chiropractors is calling "a resounding victory for chiropractors nationwide," Aetna Insurance Company has updated its national reimbursement policy regarding 97140 (manual therapy), reaching an agreement two years after the association filed a declaratory judgment suit in federal court against the insurer.
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.
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