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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.
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.
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.
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."
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?
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.
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.
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.
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.
Employers Need Chiropractic First and Sooner
From the Journal of Occupational and Environmental Medicine comes a study that gives excellent direction to employers (and insurers) regarding the management of low back problems (LBP).
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.
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.
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."
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.
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.
Working With The Yuan-Source Level: Resonance and the Extraordinary Vessels
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Vibrational Medicine: Frequency Micro-Current and Color Acupuncture
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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?
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.
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.
"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."
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.
News in Brief
D'Youville Vet Program Gets High Praise; A Moment of Silence for Dr. Paul Reginald ("Reg") Hug.
August, 2011, Vol. 11, Issue 08
Investigating the Physiology of Massage
By Massage Therapy Foundation Contributor
In this month's Massage Therapy Foundation Research Column, we are exploring how massage works on a physiological level. While massage has been shown to be effective in various settings - little is known about the mechanism of how massage produces its benefits.It is commonly thought that at least some of the effects of massage come from alleviating muscle tension. However, it has yet to be conclusively shown to reduce the underlying neural activity (tone) in the muscle. Who hasn't asked or been asked, "Where are you experiencing tension today?" as Langdon Roberts asks in his article published in the March 2011 issue of the open access International Journal of Therapeutic Massage and Bodywork.
Langdon Roberts, MA, CMT, of the Center for Transformational Neurophysiology in Soquel, Calif., investigated this issue in a study entitled "Pressure Application and Resting EMG." Using surface electromyography (EMG) to measure muscle activity, Roberts hoped to quantify the exact change in muscle activity during two types of massage - light, medium and deep massage applied in the order of increasing pressure (IP) or decreasing pressure (DP). In this study, the electrical activity generated was measured in the m. rectus femoris of the left legs of twenty-five individuals. Roberts hypothesized that muscle activity would be lower after either massage, with IP resulting in significantly lower EMG activity than DP.
Roberts writes, "[When] Goldberg et al. compared light and deep petrissage to the triceps surae [...] deep massage produced a greater reduction in the H-reflex, an electrical analog of the stretch reflex." The H-reflex (Hoffman reflex) is a measure of spinal cord excitability. Roberts cites other research that appears to link a reduction in H-reflex and massage, although he notes H-reflex hasn't been linked to pain reduction or any other known benefits of massage.
Roberts used a clinical crossover design in this study, meaning all 25 individuals received both IP and DP massage, with at least four weeks in between. The ethics of Roberts' study protocol were approved by an internal review board at the Muscular Therapy Institute in Cambridge, Mass. The massage setup was simple, with electromyography electrodes placed proximally and distally to the left rectus femoris, at its musculotendinous junctions. Each massage session was composed of three strokes for each level of pressure to each leg's rectus femoris, beginning with the left leg.
Roberts solicited the three levels of pressure as: "light, but not insubstantial," "moderate" and "as deep as possible without causing pain or a sensation of increased muscle tension." Each slow stroke was performed in a toward-proximal direction and lasted for 15 seconds. Two minutes elapsed between each pressure level. The massage therapist wore thumbtip pressure sensors and applied the strokes using adjacent thumbs. These gloved sensors showed that people in the IP and DP group preferred different objective vs. subjective pressure levels as indicated in a repeated-measures ANOVA [p<0.02]. Further study may show that subjects who receive deep pressure first require a deeper objective pressure to get to a pressure subjectively on the border of pain. In other words, clients may be able to withstand deeper pressure when it is used first. Unfortunately, equipment malfunctions prevented a test of this hypothesis in this study; only 14 subjects had "reliable" data available for statistical analysis.
The EMG results, while surprising, confirm many massage therapists' intuition. Using repeated-measures ANOVA on a group with all DP data, Roberts found, "EMG varied significantly across the four time points [p < 0.03]." In the DP data the application of deep pressure without previous massage caused a sudden increase in muscle activity, which diminished when lighter pressure was later used. This was not the case with the IP group, where "IP data indicates that EMG did not vary significantly across the four times points [p = 0.71]." These results did not differ between the IP-first and DP-first groups [p = 0.30 & p = 0.38].
Although the individuals studied were mostly (>80%) women, this is typically true about the population that seeks massage therapy as well. Another limitation of the study is that different muscles may show different EMG results, since Roberts cites studies that show "a reduction of EMG activity after massage [...] consistently found only in the frontalis muscle." Notably, the massage in this study was applied only to the rectus femoris muscles that were already relaxed, not in pain or otherwise uncomfortable.
This study validates the use of EMG as a tool for investigating the physiological basis of massage. One potential subject for further study includes a comparison of the EMG methods used here - a MEDAC Sys/3 physiological monitor. Roberts recommends a system of "counting repeated minima during each collection period," which he suggests as superior to "counting mean values" because of the commonplace nature of EMG artifacts or false readings.
How can you apply the results of this study to your own practice? If your treatment goal is to reduce or minimize EMG activity, then you should begin with light pressure and gradually increase your pressure during effleurage strokes, especially on the large muscles of the quadriceps. Unfortunately, these results are limited to asymptomatic rectus femoris muscles studied in a small group of people by a single therapist. Further research may show that a DP style of massage consistently causes a sudden spike in EMG activity, and could relate that to patient outcomes. Research has not shown a link between EMG activity and subjective tension. According to Roberts, "Carlson et al. [found] no relationship between perceived tension and EMG activity in clients with muscle pain or in pain-free subjects." Roberts suggests it is likely that "multiple modulating factors" could be at play in the EMG results seen here.
The research reported here was funded by the Massage Therapy Foundation, the same foundation that supports this column. We hope Roberts' and others' research will elucidate to what extent endorphins, reflex pathways, and/or the "freeing of nociceptive or mechanoreceptive nerve endings" contribute to the physiological benefits of massage. For more information on the MTF, visit our website at www.massagetherapyfoundation.org/.
Source: Roberts, L. (2011). Effects of Patterns of Pressure Application on Resting Electromyography During Massage. International Journal Of Therapeutic Massage & Bodywork: Research, Education, & Practice, 4(1). Retrieved from www.ijtmb.org/index.php/ijtmb/article/view/25/154
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