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News In Brief
Pacific College of Oriental Medicine obtains grant funding from NIH; Yo San University of Traditional Chinese Medicine Announces New President; Kentucky Gets Licensed; PCOM Receives Approval from WASC to Offer FPD.
Changes in Herbal Medicines from Ancient Times to the Present
The classical literature of Chinese medicine remains highly relevant in the modern era, as many of the basic theories and herbal combinations emphasized in clinical practice were first established in texts that are nearly 2000 years old.
CRREW Rallies for Ongoing Acupuncture Relief Effort in the Philippines
On November 8, 2013, Typhoon Yolanda (Haiyan) made her way through the Philippine Islands, leaving in her wake at least 7,000 people dead, millions homeless and complete communities destroyed.
Don't Trust What a Patient Says
When a patient presents to the office for care, they typically have a specific complaint in mind – lower back pain, whiplash, sinus congestion, sciatica, etc.
The Boston Benevolent Chiropractic Clinic: Standing Up for the Needy
Our chiropractic assistant, Bridget, greeted an arriving patient at the Emmanuel Church in downtown Boston. She said, "Hi, Michael, good to see you. It's been awhile. Have a seat and Dr. Ken will see you soon."
Don't Trust What Your Patients Say
When a patient presents to the office for care, they typically have a specific complaint – lower back pain, whiplash, sinus congestion, sciatica, etc. They are often not interested or engaged in what they consider "unrelated" personal health history.
The Search for the Origin of the Wiggle Technique
When Bob had adjusted me previously, most of the time I knew what he was doing. But this time, he had me lie on the treatment table in the usual side-posture position, and he "wiggled" my sacroiliac with the fingers of both hands, while stabilizing my pelvis with his forearm.
The Importance of Knowing Mainstream Lingo
There is a secret lingo within mainstream medicine of which the vast majority of acupuncturists and Chinese medical professionals are unaware.
We Get Letters & E-Mail
Imagine What More Could Be Achieved With Your Support; A Lesson in Hygiene: What Do You Do in Your Office? Open Letter to the Profession.
Halt Allergies With Moxibustion Therapy
An allergy is an immune system disorder in which the body is hypersensitive to normally harmless substances in the environment.
Low Melatonin Linked to Risk of Advanced Prostate Cancer
Epidemiological and experimental studies suggest the hormone melatonin, which plays a role in regulating the sleep-wake cycle, may play a role in the development of prostate cancer, as lower melatonin levels have been associated with an increased risk of prostate (and breast) cancer.
Home Sweet Medical Home
While the Affordable Care Act (ACA) has received its fair share of praise and criticism since its adoption, few question the value of its emphasis on collaborative, patient-centered health care.
"Doctor ... Always Do the Right Thing"
So says "Da Mayor" in the iconic Spike Lee movie. As a fresh grad questioning in-network versus out-of-network, it struck me that some doctors have explicitly skirted the issue, while others have argued adamantly for the latter and "sticking it to the man."
News in Brief
D'Youville Vet Program Gets High Praise; A Moment of Silence for Dr. Paul Reginald ("Reg") Hug.
Deciphering the New CMS-1500 Claim Form
Q: I am confused about how and when to use the new 1500 form, particularly block 14 and block 15. What is required and how do I properly fill out these fields? And do I actually have to use this new form or may I continue using the old version?
Vibrational Medicine: Frequency Micro-Current and Color Acupuncture
Vibrational medicine involves the application of various forms of energy frequencies to the body for pain relief, healing and rejuvenation. Vibrational medicine will become a major growing trend in our medical systems for the following reasons:
Working With The Yuan-Source Level: Resonance and the Extraordinary Vessels
How do we stay fresh with our medicine? As healers, how do we balance our medical selves with creative artistry? Chinese Medicine is not a fixed dogmatic entity, but a living system, reliant on a mysterious force called "resonance."
New Leadership Era at the WFC
The World Federation of Chiropractic recently announced not only a new president, as is customary every two years, but also an incoming secretary-general, marking the first time since the WFC's inception in 1988 that someone other than David Chapman-Smith, Esq., will serve in that capacity.
Medical Qigong for the Heart: Part I
According to the Center for Disease Control and Prevention, heart disease is the leading cause of death in the United States, affecting people of all ages and backgrounds. Coronary heart disease, in just the United States alone, costs close to 109 billion dollars a year.
Medial Knee Pain: 11 Potential Causes (and Corrections)
We have all seen patients with medial knee pain that either has no traumatic origin or lasts well beyond when it should be resolved. How can we help these patients? Here is an overview of clinical scenarios and how we can provide conservative care.
Replenishing and Restoring Jing
I learned an important principle from my great Taoist Master Sun Hak. He taught me that all people "leak" Jing, and that we can mitigate or stop this leaking, and as a result strengthen our life force, develop enhanced adaptability and lengthen our life.
Wellness: A New Buzzword at the Aging in America Conference
Aging in America is "the nation's largest gathering of a diverse, multidisciplinary community of professionals in healthcare, social service, government, business and philanthropy with expertise in providing services and products for older adults."
Shared Mechanisms Between Computer-Assisted Mechanical Adjusting and Contemporary Acupuncture?
Can contemporary acupuncture provide clues to the mechanisms responsible for pain relief provided by computer-assisted mechanical adjusting instruments, and clarify whether certain mechanical frequency combinations are superior to others for modulation of acute peripheral pain?
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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