Psychoneuroimmunoendocrinology describes the unity of mental, neurological,
hormonal and immunological functions, addressing the impact of cognitive
images of the mind (whatever its elusive definition) on the central
nervous, endocrine and immune systems. It encompasses biofeedback and
voluntary controls, impacts on physiology of thought and beliefs, past
and present stress, placebos, social relationships and "energy
medicine." This column highlights cogent studies from these arenas
regarding holistic medicine in the new millennium.
Pain, analgesia and placebo
In the early 1950s, a new procedure was developed by surgeons in Texas
for alleviation of angina and CAD. The internal mammary artery in
the chest sends branches to the myocardium; the surgeons reasoned
that more blood could be forced into the heart if the other branches
of the internal mammary artery to the chest wall were ligated. Great
enthusiasm developed for the operation with 70% of patients experiencing
total relief from their angina. Beecher reports this study in which
100 patients were submitted, without their knowledge, to a sham operation
in which the chest was opened, the ribs interrupted, and the wound
closed without approaching the internal mammary artery. The patients
so operated experienced the same 70% rate of relief as those whose
internal mammary artery had been ligated. Many also experienced improvement
in the electrocardiogram, in their exercise tolerance and in significant
reduction in the use of pain medications.
Beecher HK The Powerful Placebo. J Am Med
Assoc 1955 Dec 29; 159(17):1602–06
COMMENT: There are few more striking examples of research in dolorology
than this study of placebo effects. The ethics of full disclosure in
the 1950s apparently did not deter surgeons from doing these sham procedures
on angina patients. Needless to say, this strikingly successful new
operation, a precursor to the later development of coronary bypass
graft procedures was quickly abandoned. This does remind us that most
surgical procedures have never been subjected to double-blind, placebo-controlled
randomized crossover research. Most surgical procedures, of course,
have not been subjected to this "gold standard" research
because surgeons cannot be blinded about what they are doing. The final
evaluators of outcomes and the patients involved could both be blinded,
but few procedures have been subjected to this approach in research.
(See below.)
Osteoarthritis of the knee and the placebo effect
After 10 subjects with knee osteoarthritis gave full informed consent
including full knowledge of the possibility and nature of a placebo
surgery, three were randomized to a placebo arthroscopy group, three
to arthroscopic lavage, and three to standard arthroscopic debridement.
The evaluating physicians and the patients remained blinded as to
treatment. Patients who underwent the placebo surgery reported decreased
frequency, intensity, and duration of knee pain, thought that the
procedure was worthwhile and would recommend it to family and friends.
There may thus be a significant placebo effect for arthroscopic treatment
of osteoarthritis of the knee. The small numbers in this preliminary
study preclude a valid statistical analysis, and no conclusions can
be drawn regarding the superiority of one treatment over another.
Moseley JB Jr, Wray NP, Kuykendall D et al. Arthroscopic treatment
of osteoarthritis of the knee: a prospective, randomized, placebo-controlled
trial. Results of a pilot study. Am J Sports
Med 1996 Jan-Feb; 24(1):28–34
COMMENT: In this small pilot study, final evaluators and patients were
both blinded and the small numbers precluded adequate statistical analysis.
Nonetheless, significant positive results were seen in the three who
submitted to the placebo sham procedure. But stay tuned, see below.
Arthroscopic surgery and placebo
One hundred eighty patients with osteoarthritis of the knee were randomly
assigned to receive arthroscopic debridement, arthroscopic lavage,
or placebo surgery. Patients in the placebo group received skin incisions
and underwent a simulated debridement without insertion of the arthroscope.
Patients and assessors of outcome were blinded to the treatment-group
assignment. Outcomes were assessed at multiple points over a 24-month
period with the use of five self-reported scores—three on scales
for pain and two on scales for function—and one objective test
of walking and stair climbing. A total of 165 patients completed
the trial. At no point did either of the intervention groups report
less pain or better function than the placebo group. M scores on
the Knee-Specific Pain Scale (range, 0 -100, with higher scores indicating
more severe pain) were similar in the placebo, lavage, and debridement
groups: 48.9, 54.8 and 51.7, respectively, at one year (p=0.14=NS
for the comparison between placebo and lavage, p=0.51=NS for the
comparison between placebo and debridement) and 51.6, 53.7 and 51.4,
respectively, at two years (p=0.64 and p=0.96, both NS, respectively).
The 95% confidence intervals for the differences between placebo
and intervention groups exclude any clinically meaningful difference.
Moseley JB Jr, O'Malley K, Petersen NJ et al. A controlled trial
of arthroscopic surgery for osteoarthritis of the knee. N
Engl J Med 2002 Jul 11; 347(2):81–8
COMMENT: In this controlled trial involving 180 patients with osteoarthritis
of the knee, outcomes after arthroscopic lavage or arthroscopic debridement
were no better than those after a placebo procedure. Here we have adequate
numbers for surgical analysis, and the results echoed the original
pilot study in 1996. So what are we to conclude about pain and placebo?
The perception of pain has an extremely large subjective component
in which one's belief system plays an enormous role. Medical
students are unfortunately not generally taught a lot about the power
of suggestion, and the influences of the mind on perceptions—of
pain, illness or state of health.
Therapeutic effect of placebo
Placebos can be physical (e.g., a manipulation), pharmacological (e.g.,
a pill) or psychological (e.g., a conversation). Thirty-two trials
were reviewed, involving results of no treatment versus pharmacological,
manipulative or psychological placebo interventions. Compared with
no treatment, relative risk of an unwanted outcome with placebo was
0.95 (NS). For trials with continuous outcomes, RR of an unexpected
beneficial outcome in placebo was—0.28 (95% CI—0.38 to—0.19);
this effect decreased with increasing sample size. The pooled standardized
mean difference was—0.36 for trials with subjective outcomes
(95% CI–0.47 to—0.25) but not for objective outcomes.
In 27 trials involving pain treatment placebo had a beneficial effect
of—0.27 (95% CI—0.40 to—0.15), with a reduction
in pain intensity of 6.5 mm on a 100-mm visual-analogue scale. The
authors found "little evidence in general" that placebos
had powerful clinical effects. The authors state "outside the
setting of clinical trials, there is no justification for the use
of placebos."
Hrobjartsson A, Gotzsche PC. Is the placebo powerless? An analysis
of clinical trials comparing placebo with no treatment. N
Engl J Med 2001 May 24; 344(21):1594–602
COMMENT: Not all authors in the field agree that placebo effects are
real. In this meta-analysis, the authors, in spite of denigrating the
general effect of placebo, conclude that pain intensity was significantly
statistically reduced, a result which would seem to be at odds with
their general conclusion. This appears to ignore the fact that there
is an inevitable placebo effect in every health professional-patient
transaction. Since placebo effects are imbedded in every physician-patient
interaction, it would be helpful to understand them and utilize them
for better outcomes.
Pain and meditation
Ninety chronic painpatients were assigned in an open trial to either
routine traditional care or a 10-week relaxation and stress reduction
program. The McGill-Melzack Pain Rating Index, Body Parts Problem
Assessment Scale, Body Part Map and other psychological instruments
were used to assess stress and psychological status before, during
and after the 10-week program. Compared to the traditional care group,
significant decreases developed in "present moment pain," inhibition
of activity due to pain, symptoms, mooddisturbances, negative body
image, anxiety and depression (all p<.003). The traditional care
group showed no significant improvement.
Kabat-Zinn J. The clinical use of mindfulness meditation for the self-regulation
of chronic pain. J Behav Med 1985 Jun; 8(2):163–90
COMMENT: The use of meditation as an element in chronic pain control
is a fairly recent development in pain research. This gives me an opportunity
to share my own experience with chronic pain and meditation. On investigation
of recent onset of chronic low back pain in my forties, a congenital
malformation of my lumbosacral joint came to light. Films revealed
a second-degree spondylolisthesis of L5 on S1. My orthopedist, of course,
said, "Learn to live with it." My response was to begin
taking moderate strength analgesics, and within a year I was requiring
stronger medication, which raised the specter of drug habituation with
such a long-term condition. I sought a number of treatments, eventually
finding that the best two were consistent physical exercise (walking
and running), and meditation. Of all the elements in my pain management,
meditation has been by far the most significant contributor. While
it is possible I am only experiencing a marked placebo effect, the
best intervention by far has been my practice of a form of Agni Yoga
meditation. If it is only a placebo effect because I believe meditation
will help, I do not really care. In truth I started the meditation
practice for other reasons and found the pain relief unexpectedly.
The regular practice of meditation did not seem to diminish the pain
per se, but it simply did not bother me nearly as much. As I type the
copy for this column I am aware of pain whenever I stop to think about
it, I find it to be present. The meditation practice has somehow made
it possible for me to be much less aware of the pain to the point that
it interferes with practically nothing I want to do, including a 27-mile
hike last summer on the Cascade Crest trail. Recently I have also had
considerable effect of treatments by a skilled practitioner of quantum
touch. (See Gordon, Richard, Quantum Touch, Box 852, Santa Cruz, California
95061)
More on pain and meditation
In an open trial, the effects of mindfulness meditation were studied
in 250 chronic painpatients, the vast majority of whom were experiencing
low back pain, neck painor headache. The process involved practicing
Hatha Yoga in slow meditative fashion emphasizing mindfulness with
an awareness of breathing. Instruments used to assess pain at baseline
and after 8 weeks included the McGill Melzack Pain Rating Index,
Body Parts Problem Assessment Scale, Medical Symptom Checklist and
General Severity Index. At the end of training, improvement was highly
significant (p<.0001) Follow-up at 2.5 to 48 months found 30–55%
greatly improved, 60–72% greatly or moderately improved, 25%
no change and 1–15% worse. There was a trend toward weakening
in the effectiveness over the 4 years of follow-up.
Kabat-Zinn J et al. Four-year follow-up of a meditation based program
for the self-regulation of chronic pain: treatment outcomes and compliance.
Clin J Pain 1986; 2(3):159–73.
COMMENT: This is a second published experience with Mindfulness Meditation
by Kabat-Zinn who at the time was at the University of Massachusetts.
Meditation focuses attention away from pain. The biochemical results
of the state of meditation entrain muscle relaxation and an altered
state of awareness—a state of detachment or disidentification
from the pain. The founder of the psychological discipline Psychosynthesis,
Roberto Assagioli MD, stated it well: "Anything with which we
identify will control us; anything from which we disidentify we can
control." A cancer patient whom I helped manage through her metastatic
bone pain once told me after she had undergone three hypnosis treatments, "Oh
yes, I have pain, but it's over there in the chair."
Anginal pain and meditation
Chest pain with normal coronary angiograms is often associated with
chronic sympathetic activation, anxiety, and depression, and is resistant
to conventional antianginal treatment. In nine women with consistent
angina, the practice of transcendental meditation for 3 months b.i.d.
significantly improved exercise tolerance, angina episodes, and quality
of life.
Cunningham C et al. Effects of transcendental meditation on symptoms
and electrocardiographic changes in patients with cardiac syndrome
X. Am J Cardiol 2000 Mar 1; 85(5):653–5, A10
COMMENT: Again, this small pilot study involved such a small number
of patients that a statistical analysis was not feasible, and one looks
for larger studies with the same design. Even so, here is a common
form of chronic pain, that of angina from coronary insufficiency, which
can in many patients be better managed with mind-body techniques. They
are, of course, not a substitute in dealing with the cause of the angina,
but an amazingly appropriate ancillary management approach.
Rheumatoid arthritis pain and prayer
Forty-four adult patients with rheumatoid arthritis were recruited
for the study if they met American College of Rheumatology criteria
for diagnosis of class II disease, had a positive rheumatoid factor,
or had radiological evidence of joint erosions. All subjects had
a rheumatological evaluation by a single reviewer at baseline. Subjects
underwent a 3-day protocol of educational sessions (6 hours) regarding
physical, emotional and spiritual healing, forgiveness, anger, and
impediments to healing; and six hours of "soaking prayer" with
laying on of hands over affected joints by praying ministers. The
first 26 subjects were assigned to a six-month program of daily supplemental
intercessory daily prayers for at least 10 minutes by two remotely
located ministers. The praying ministers received a picture and brief
description of demographic and clinical information regarding the
patient to whom they were assigned. The next 15 enrollees were assigned
to a waiting list. All underwent re-evaluations of clinical status
at 3, 6, 9 and 12 months beyond baseline. Baseline evaluation was
compared to interval and final evaluations regarding 10 variables.
Four of 44 subjects failed to complete the protocol. Standard rheumatoid
arthritis medical treatment was continued. No differences emerged
for the waiting list and supplemental prayer groups. All subjects
undergoing the initial 3 day protocol experienced increased grip
strength (p=0.039), reduction in number of tender joints (p<0.001,
swollen joints (p<0.0001), pain (p=0.004), fatigue (p=0.007),
and level of functional impairment (p=0.0002).
Matthews DA et al. Effects of intercessory prayer on patients with
rheumatoid arthritis. South Med J 2000 Dec; 93(12):1177–86
COMMENT: Intensive prolonged prayers with laying on of hands led to
significant improvement in objective and functional measures of these
rheumatoid arthritis patients; additional remote prayer did not enhance
results. The vagaries of the demonstrated therapeutic effects of prayer
are not fully understood. In this study, the beneficial effects can
be largely explained on a psychological basis. In other studies in
which demonstrable remote prayer effects are found, one must postulate
a mechanism that transcends conventional teaching regarding the effects
of energy. A common postulation for these non-local effects may lie
in the concept of a "collective unconscious" postulated
by the two deceased European psychiatrists Roberto Assagioli and Carl
Jung.
Low back pain and hypnosis
Fifteen adults 18–43 years of age with chronic low back pain
(mean duration 4 years) were found to be moderately/highly hypnotizable
based on the modified 11-point Stanford Hypnotic Susceptibility Scale.
Somatosensory event-related potential correlates of noxious electrical
stimulation were evaluated during attend (control) and hypnotic analgesia
conditions at anterior frontal, midfrontal, central, and parietal regions.
Significant brain inhibitory processing was evidenced in different
brain locations (p<.05—p<.001) compared to the control
condition. Hypnotic analgesia led to highly significant mean reductions
in perceived sensory pain and distress (p<.001). Participants were
then shown to develop self-efficacy through the successful transfer
of newly learned skills of experimental pain reduction to reduction
of their own chronic pain; within three sessions, they reported chronic
pain reduction, increased psychological well-being, and increased sleep
quality. In 60% the pain was totally gone and in 80% the distress was
totally gone by the end of the third session.
Crawford HJ et al. Hypnotic analgesia: 1. Somatosensory event-related
potential changes to noxious stimuli and 2. Transfer learning to reduce
chronic low back pain. Int J Clin Exp Hypn 1998 Jan; 46(1):92–132
COMMENT: Hypnotic analgesia is an active process that requires inhibitory
effort, dissociated from conscious awareness, in which the anterior
frontal cortex participates in a topographically specific inhibitory
feedback circuit that cooperates in the allocation of thalamocortical
activities. The development of "neurosignatures of pain" can
influence subsequent pain experiences, and may be expanded in size
and easily reactivated. Therefore, hypnosis and other psychological
interventions need to be introduced early as adjuncts in medical treatments
for onset pain before the development of chronic pain. These techniques
are enormously successful and are grossly underused, probably because
they are not adequately or commonly taught in medical education systems.
Pain is, after all, perhaps the most common reason for admission to
hospitals. One cannot think of a single intervention that could more
significantly impact the cost and inconvenience of overuse of hospitals.
Robert Anderson is a retired family physician. In mid-career, his
practice took a holistic turn as decades passed. He has authored five
major books, Stress Power!, Wellness
Medicine, The Complete Self-Care
Guide to Holistic Medicine (co-author), Clinician's Guide to
Holistic Medicine (McGraw Hill, 2001), and The
Scientific Basis for Holistic Medicine, (6th edition 2004), now available from American
Health Press, holos@nwi.net. Anderson was the founding president of
the American Board of Holistic Medicine, past president of the AHMA,
former Assistant Clinical Professor of Family Medicine at the University
of Washington and currently Adjunct Instructor in Family Medicine at
Bastyr University.
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