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Understanding Levels of Evidence
The concept of levels of evidence is a cornerstone of research literacy and a great starting point for understanding basic principles of how research works.
One of the most common trends to see in clinical medical practice and public health is the cycles of health "buzzwords." These come and go depending upon the current cultural zeitgeist. One year, "parasites" are causing all the issues, and the next year it's "candida."
Holistic Skin Care and Modern Technology
Anti-aging is a concept that we hear in reference to skin rejuvenation and growing older on a daily basis. Aging begins as soon as we are born; therefore "pro-aging" is embracing all stages of life gracefully, with vitality, wisdom, joy, and gratitude as the goal.
Keeping Malpractice Allegations at Bay
It has been suggested that in the litigious environment in which we live, the practice of chiropractic should be defensive and practitioners should constantly be watching their backs. An element of defensive practice is a good idea.
Discovery: Finding Insights and Each Other in Different Disciplines
Recently I've been thinking about all sorts of things which are hidden from our daily direct experience. That general category is what links nearly everything that catches my attention and then demands some kind of investigation.
Sleepless nights, anxiety, mood swings, euphoric energy bursts, obsessive thinking, and a strange feeling in his chest. That is what Matt was experiencing when he first entered my practice. Rather than being concerned, he was loving every minute of it.
A Different Way of Looking at It
The way you and your chiropractic colleagues access information has changed over the past decade. According to a recent survey conducted by Dynamic Chiropractic, almost half (48 percent) of DCs read online articles on their personal computer or laptop daily.
With Low-Back Pain, Sometimes Little Things Matter
Typical treatments for low back pain involve large muscles like the quadratus lumborum, iliopsoas, and piriformis. However, there are situations when a very small muscle, the multifidus, can play a significant role in the diagnosis and treatment of low back muscular or spinal injury.
Building Bridges with Discipline
As practitioners of traditional Chinese herbal medicine, our role is to educate patients and medical practitioners about the various safety aspects of our medicine. Medical doctors that embrace Chinese medicine want to collaborate and include Chinese herbal medicine in more aspects of clinical care to support their patients.
Distal Style Treatment of Neurogenic Pain
Treat locally or distally? This question has frequented my thoughts for the treatment of pain throughout my acupuncture career. Each style has strengths and weaknesses, thus the versatile practitioner would do well to forgo dogmatic adherence to any one style in deference to the needs of the individual patient.
Finger (Pad) Pointing: Repetitive-Use Injury Waiting to Happen
"My wrist and hand hurt. I spend all day working on computers and then I come home and spend more time on a computer, usually playing video games."
How to Reach Your World With the Chiropractic Message
My latest effort to share chiropractic occurred in mid-May while I was sitting at an introductory parent information night for high schoolers. The IT instructor informed us that each student would be receiving a computer for all their studies.
Constructing Our Reality, Part 2
My last article discussed perception and its relationship to the primary channels. Before we get to the channels most commonly used to treat sensory disturbances, the small intestine and triple heater, we should first talk about the bladder channel.
Hip Flexor Contractures & LBP in Above-the-Knee Amputations
Patients with above-the-knee amputations (AK or AKA) are particularly prone to developing hip flexor contractures. Not to be confused with muscle tightness, contractures are a permanent shortening of tissues which cause deformity or distortion.
The Need for Standards
ISO-TC-249: You may look at these letters and numbers and wonder what they are and what they might mean. They turn into: International Standards Organization- Technical Committee – 249. There is a global organization called The International Organization for Standardization.
Streamline Your Front Desk
Your front office can be your greatest source of efficiency or it can be a constant bottleneck. Increasing the productivity of this area, while not sacrificing the quality of patient interaction, can be a little tricky. However, with some focused effort and intention, your front desk can keep your practice running smoothly.
Living Well: Lessons From Our Oldest Old
Aging is a significant public health problem, important to chiropractors in practice and important to DCs who teach students training to become chiropractors.
A Whole-Body Approach to Chronic Tension Headaches
Nearly every day in our practices, we see patients with chronic headaches that have not responded to traditional treatment. They present in our offices with a feeble hope that "maybe" a chiropractor can help.
Low Fat vs. Low Carb & the Power of Protein
A science-based website recently posted a nice summary of 23 randomized, controlled trials from peer-reviewed journals pitting low-carb diets against low-fat diets.
Billing Timed Services
Q: I do not always use physical medicine services but in my state I do have a scope of practice that allows me to provide many of these services. I am trying to understand what "direct one-on-one patient contact" means in relation to physical medicine services.
Parker University Embraces New Era
Change is in the air at Parker University, which recently announced the selection of both a new president and a new consultant for its seminar program.
News in Brief
NYCC Aggregates Degree Programs in New School; Palmer Chancellor Receives Education Award From ICA; Oklahaven Announces "Have a Heart" Winners.
Transforming Las Vegas
On a warm spring day in Las Vegas, Sonia Kim, clinic front desk staff, is busy preparing for a full day of intern shifts at Wongu Health Center. She greets patients, makes sure documents are properly signed, and lets the interns know that their patients have arrived.
Prostate Cancer Risk
A large study published in January 2016 in the American Journal of Clinical Nutrition showed that men who are vegans had a 35% lower risk of developing prostate cancer compared to non-vegan men. The study followed more than 26,346 men who are part of the Adventists Health Study-2.
Billing One-on-One, Direct Patient Contact
This is often misunderstood and leads to trepidation when documenting and subsequently billing timed services.
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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