resourcesABOUT MT AUTHOR GUIDELINES CLASSIFIEDS EDITORIAL CALENDAR MEDIA GUIDE MASSAGE MART SCHOOLS & EDUCATION FEEDBACK
Green Tea Catechins Lower PSA, Other Biomarkers in Men With Localized Prostate Cancer
A 2006 study (Cancer Research) was the first human investigation to show that green tea catechins (GTC) are highly effective in reversing premalignant prostate lesions (high-grade prostate intra-epithelial neoplasia), an established precursor to prostate cancer.
Monoculture of the Mind: Part II
Cases are built within boundaries. Such bounds may be a program, event, activity or individuals. In this instance, a medical case has boundaries that include clinical interactions that are comprised of history, signs, symptoms, diagnoses, treatment plans and treatments.
The Healing Properties of Light: An Interview With Researcher Anna Cocliovo
This interview is with Anna Cocliovo, a light researcher and Acupuncturist in Arizona. During my own research in light, I came across the article she published for the American Journal of Acupuncture and sought her out as a result.
Why DCs Need to Understand the Principles of "Inclusive Design"
In the past few columns, I've written about the negative effects of prolonged sitting at work. I've attempted to make the point that prolonged sitting (or prolonged standing) takes a toll on workers. Now let's discuss a related issue: the concept of "inclusive design."
Creating Child-Friendly Clinics with ABT
The Zurich Dojo was scattered with toy ducks, dolls, trains, exercise balls and teddy bears during my recent pediatric workshop.
Collaboration for a Cause
The Patient Protection and Affordable Care Act strongly encourages the formation of multidisciplinary practitioner teams called Patient Centered Medical Homes (PCMHs) and Accountable Care Organizations (ACOs).
Steven Rosenblatt: Birthing A Cross-Cultural Acupuncture Profession
The existence of a cross-cultural acupuncture profession in the United States, one that is legalized, licensed, supported by formalized, academic training and inclusive of non-Asian practitioners, is an important part of the medical landscape in this country and is responsible for improving the lives of hundreds of thousands of Americans.
AAAOM – Making Promises They Can't Keep
When the AAAOM first formed in 2007, their mission was clear: to support the profession through education, resources and legislative advocacy. The first years of the organization were filled with promise and hope.
Epigenetics: The Western Science Supporting Essence
Since the days of Darwin, western medicine has touted that our genes were set in stone, that our genetics were our destiny. We were told that the diseases that ran in our family were likely coming to us as well.
Are You Guilty of Paternalism in Your Approach to Patient Care?
Einstein is purported to have said, "When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute and it's longer than any hour. That's relativity." In some way, everything is relative to one's point of view.
Risk Factors for Heel Problems
Heel pain and gait disability are common occurrences in adults, often the result of thinning heel pads and a lifetime of exposure to heel-strike shock. One condition experienced by many people is plantar fasciitis.
Get That Shoulder to Move: Restoring Internal Rotation
How many times have you mobilized, performed ART, Graston, FAKTR and PIR, and stripped a patient's posterior capsule, yet on re-exam, discovered it was still blocked?
One and Done: Keeping Patients From Vanishing After Just One Appointment
What happened to my 3:30 p.m. ROF? They may have rescheduled, but there are two common answers no one wants to hear: 1) "She called to cancel. I tried to get her to reschedule, but she refused." 2) "She no-showed.
What is a Discipline in Medicine?
In my now prolonged dialogue with physicians, one question emerges with enough regularity to deserve mention and naming: what is a discipline?
Leaving a Lasting Legacy: Donna Liewer
For the past 31 years, Donna Liewer has been on a personal mission "to comfort the afflicted and afflict the comfortable." In her role as executive director of the Federation of Chiropractic Licensing Boards, Liewer has accomplished that and much, much more.
Chiropractic Prevents ADHD? Research Shows...
Now that I have your attention, let me tell you what the latest study actually states. As you may have noticed, research over the past few years has begun to reveal that acetaminophen (the primary ingredient in Tylenol) is not as safe as once thought.
Successful Strategies in Integrating Acupuncture and Shiatsu in a Hospital Oncology Program
Colleagues from the Network of Researchers in Public Health in CAM recently published an article of interest to our Traditional Asian Medicine community.
AAAOM – The Beginning of the End (Part II)
In 2012, the AAAOM board members met in Chicago for their annual meeting. The goal was to come to a consensus on a long list of issues the AAAOM needed to work on including a functional board and budget.
Flexion-Intolerant Lower Back Pain (Pt. 3): Mobilization & Soft-Tissue Treatment
What is the biggest challenge to the chiropractor in treating discogenic pain? You have to completely reframe the purpose of your manipulation. It is rarely about unlocking a stuck segment at the disc involvement level; it is not about putting a joint back in alignment.
Stress in the Modern Age: Impact on Homeostasis and What You Can Do (Part 1)
In 1926, Hans Selye first used the word stress in a biological context, referring to the nonspecific response of the body to any demand placed upon it.
News in Brief
Hamm Elected New President of the ACA; WFC / ACC 2014 Education Conference: Call for Papers; F4CP Recognizes Standard Process as $1 Million Supporter; Texas Chiro. College Begins Search for New President; League of Chiropractic Women Hosts Women's Success Summit.
May, 2008, Vol. 08, Issue 05
The Controversy of Cranial Bone Movement
By Lisa Johnson Zee; guest author for John Upledger, DO, OMM
Editor's note: Dr. Upledger has asked guest author Lisa Johnson Zee to share her thoughts on cranial bone movement in this month's column.
In anatomy and physiology, I learned that cranial bones fuse in early adulthood or childhood.1 Gray's Anatomy supports the theory that the sutures grow together, creating a solid mass of bone called the calvarium. The fused skull functions as a helmet in which volume or pressure changes in blood, cerebrospinal fluid (CSF) or brain tissue cause corresponding pressure changes in other systems to prevent an increase of intracranial pressure.
However, there is a sizable body of literature that documents a small, rhythmic movement of the cranial bones. The bulk of these studies come from the cranial osteopathy medical field. The following is a synopsis of some of these studies.
Tettambel used force transducers to measure movement between the frontal bone and bilateral mastoid processes of the temporal bone in 30 subjects.2 She recorded three rhythms including the cardiac and respiratory rhythms. She hypothesized that the third pulse, which averaged eight cycles per minute, was the craniosacral rhythm.
Frymann studied the rhythmic changes in the circumference of the head using a U-shaped frame with a differential transducer.3 Changes in the diameter of the skull were measured by the displacement of metal rods. This study is unique because it measured movement in live human subjects. Frymann found a pulsating rhythm between six and eight cycles per minute separate from cardiac and respiratory rates. The amount of displacement was measured between 10 and 30 microns.
Another study by Adams, et al., looked at parietal bone mobility in cats.4 These researchers fastened strain gauges to feline parietal bones to measure movement when injections of artificial CSF were given. The bones moved significantly, varying from 17 to 70 microns. External lateral head compression caused a measurable widening of the sagittal suture with an inward rotation of the parietal bones.
Researchers at the University of Michigan College of Osteopathic Medicine have looked at cranial bone mobility in adult primates.5 Michael and Retzlaff used a direct screw attachment on the right parietal bone and measured movement with a pressure transducer. They also measured blood pressure, heart rate and respiration rate. The parietal bones moved spontaneously in two distinct rhythms, one corresponding to the respiration rate and a second, slower rate of five to seven cycles per minute.
These four studies indicate cranial bones may show a slow, steady, cyclical movement. A relatively new theory for Western medical science, it represents a dramatic shift. Bringing controversial ideas into the status quo of scientific thought is not easy, but the body of literature supporting cranial movement is growing. Although inconclusive, it deserves to be approached with an open mind.
In CranioSacral Therapy (CST), the rhythm of CSF can be palpated at all parts of the body due to the passive action of fascial connective tissue. The rhythm occurs in two distinct phases: flexion (outward movement) and extension (inward movement). In physical therapy terms, flexion is a decreasing measurement of degrees in the angle of the joint. The sphenobasilar joint is where the posterior sphenoid articulates with a ridge on the occipital bone.
When Dr. William Garner Sutherland, the "father of osteopathy," palpated the movement of these bones, he noticed this joint does indeed flex or reduce angle size on the inferior side. The flexion of this angle is accompanied by subtle outward movement in the body, which Sutherland called flexion. Therefore, in CST, the cranium, along with the rest of the body, is in flexion when it widens and in extension when it narrows.
Anatomy of Suture Closure
To discover more about cranial bone motion, let's examine the nature of cranial sutures. If the sutures remain flexible throughout adulthood, some degree of motion is possible when driven by pressure changes in the craniosacral system. If the tissues fuse and become immobile, rhythmic motion is unlikely.
Several studies have examined the nature of the cranial sutures. Retzlaff, et al.,used light and scanning microscopy to examine tissue samples of adult primate sutures.6 They found connective tissue, blood vessels and nerve fibers present in the sutural space. They described a five-layered pattern of fibers and cells containing collagenous bundles. Tissue was reported to be arranged in a wavy pattern. The researchers hypothesized the purpose of the tissue might be to control the elongation of the collagen bundles. They reported no evidence of fusion in the adult primate sutures.
In a separate study, Upledger and Retzlaff examined the sagittal suture in primate skulls.7 They found not only connective tissue, but also a vascular network and neuronal plexuses and receptors in sutural tissue. In one specimen, they were able to trace a single dendrite through the dural membrane into the brain, terminating in the third ventricle containing CSF. Further study of this neural tract may bring answers to how the homeostatic feedback mechanism in the brain's CSF hydraulic system functions.
In the 1920s, Todd and Lyon published two articles examining a timeline of sutural closure in the male human skull.8 These researchers hypothesized that cranial sutures fuse at some point in the human lifetime. They started with 427 specimens, but rejected 81 due to abnormal suture closure or "delayed union." Furthermore, some of the skulls were termed lapsed union, which meant failure of the suture to close due to a concentration of bone along the edge of the articulatory surface. For reasons unclear, they counted these skulls as fused, which biased results toward earlier suture closure. The data they found is as follows:
The authors concluded that the sutures tend to close along this timeline. However, there is a high degree of variability reported. This study also was conducted some 80 years ago. Standards of protocol in scientific research have changed.
Researchers have studied one suture in-depth using different human specimens. Kokich examined one suture in the facial area - the frontozygomatic suture.9 Of his 61 specimens, he found none demonstrated closure until after age 80, and some weren't completely fused even after age 90. He noted that bony interdigitations formed along the suture with advancing age, but did not affect the patency of sutural movement. Kokich, like Retzlaff and Upledger, found clear evidence of collagen fibers within the suture. He stated that frontozygomatic suture remains a functioning "articulation" until late in life.
A conclusive statement about whether and when sutural fusion occurs cannot be made from existing research.10 Clearly the subject remains open for debate. Having palpated the craniosacral rhythm with my own hands, I believe cranial sutures maintain flexibility that might best be called articulation. This flexibility allows the bones to move passively as they are driven by the craniosacral system.
Click here for previous articles by John Upledger, DO, OMM.
Lisa Johnson Zee is a clinical supervisor and instructor in the Communication Disorders and Sciences Program at Southern Illinois University Carbondale. She is certified in CranioSacral Therapy Techniques through The Upledger Institute. Her other interests include complementary and alternative medicine, traumatic brain injury and bilingual Spanish/English therapy.
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