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A
Cat’s Healing Purr
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By
Lev G. Fedyniak, MD
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02/07/2003
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We’ve
always intuitively felt that a cat somehow knows when we’re not feeling well
and even where it hurts. Got a headache and a cat just seems to wrap around your
head. A stomachache and a cat can’t seem to get off your abdomen. And purrs
and purrs and purrs!
It
was always believed that a cat’s purr was relaxing or stress reducing and that
that led to any number of healthful benefits. While that may be so, science has
shown that the cat’s purr is much more than just relaxing. Remember that
it’s not just the sound of purring that’s important but more the tremor or
vibration it produces.
A
Cat’s Nine Lives
Interestingly,
science has known for many years that vibrations at specific levels or
frequencies cause healing changes in the body. They can, for example, induce
bone growth and regeneration. Bone fractures heal faster and weakened bones
begin to strengthen and rebuild.
Also,
in the higher frequency ranges, the production of the body's own natural
anti-inflammatory compounds increases thereby reducing joint pain and swelling.
There is further evidence of muscle, tendon and ligament repair within these
frequency ranges as well, which has led to some popularity in sports medicine
and gyms around the world, especially in the former Soviet Union where so much
of this research was conducted.
It
was also known through various veterinary studies, such as the one reported in
The Journal of the American Veterinary Medicine Association for example (J Am
Vet Med Assoc 99; 214(9): 1336-41), that cats rarely suffer bone or joint
related diseases, including hip dysplasia, arthritis and ligament problems. Even
bone cancers, such as myeloma or osteosarcoma, are almost unheard of in cats.
But
it took researcher Elizabeth von Muggenthaler of the Fauna Communications
Research Institute in North Carolina (FCRI), a specialist in the field of
bioacoustics, to put it all together. Bioacoustics is the study of the
frequency, pitch, loudness, and duration of animal sounds as it relates to the
animal's behavior. Based on her research, she proposes that nature has endowed
all kinds of felines with an evolutionary healing advantage in the simple act of
purring.
Remember
that purring takes energy and cats purr not only when all is well, but also when
the cat is giving birth, hurt or just scared. There has to be a very good reason
for the energy expenditure to produce purring, especially when the cat is
physically stressed or ill. It would have to be somehow involved in its
survival, and Muggenthaler set out to find how.
The
Science Behind the Purr
She
recorded and then measured the purr of forty-four felids (members of the cat
family) including cheetahs, ocelots, pumas, domestic cats, and servals. Cats,
from your house pet to lions and tigers in the wild, generally purr in the range
of 20 to 140 Hertz (Hz). Some are as high as 150 Hz but the average housecat
comes in at about 25 and 50 Hz.
Research
has already shown that exposure to frequencies at that same 20 and 50 Hz level
induces increased bone density. In one study, for example, chickens were placed
daily on a vibrating plate for 20 minutes, which resulted in stronger bone
growth (National Geographic January, 2001 p. 11). Further, in 1994, Dr. Chen and
his associates, working with rabbits, determined that frequencies of 25 and 50
Hz promoted bone strength by 20%, stimulating both the mechanism and speed of
fracture healing (Chen et al, ‘The Effects of Frequency of Mechanical
Vibration on Experimental Fracture Healing’. Chinese Journal of Surgery, 32
(4), 217-219, 1994).
There’s
even a popular saying amongst veterinarians, “If you put a cat and a bunch of
broken bones in the same room, the bones will heal.”
There
is also substantial documentation that low frequency vibration induces pain
relief and healing of tendons and muscles, and cats purr at those very same
frequencies.
Remediation
of other illnesses due to the cat’s purring ability is also being put forward.
For example, respiratory problems associated with heart disease in cats are
almost non-existent. In fact, respiratory problems resolve quickly once purring
is activated. Dr. T. F. Cook in 1973 wrote the article ‘The Relief of Dyspnea
In Cats By Purring’ in the New Zealand Veterinary Journal (dyspnea is the
condition of difficulty in breathing). It seems a dying cat had such difficulty
breathing that the vets were considering euthanasia. But the cat was found to
begin breathing normally once it began to purr! The purring appeared to open up
the cat's air passages.
Domestic
cats are generally less prone to postoperative complications following
surgeries. Other healing mechanisms associated with purring include large
skin-tissue grafts that take quickly in cats without necrotizing. The list just
continues on and on.
In
effect then, by changing the frequency of their purring, cats may be fine-tuning
their healing abilities, and it is this unique healing advantage that has
probably given rise to the notion of cats having nine lives. They survive
conditions that normally kill other animals, such as falls from heights. In a
study of 132 cat falls with an average fall height of 5 ½ stories, 90%
survived. The record height for a cat falling and surviving is 45 stories!
Muggenthaler
concludes that such “an internal healing mechanism would be advantageous,
increasing recovery time and keeping muscles and bone strong when sedentary.”
Vibrational
Purr Therapy?
The
extrapolation of this research may prove vital. Studies continue regarding
tissue exposure to frequencies between 20-50 Hz. For example, Dr. Clinton Rubin
in a 1999 study discovered that such exposure creates the robust striations of
increased bone density, suggesting applications for osteoporosis, particularly
in post-menopausal women and the elderly.
Ukrainian
and Russian researchers discovered the benefits of using vibratory stimulation
many decades ago and have employed these techniques in sports training and
sports medicine. Since the fall of the Iron Curtain, many of the treatment
devices used by the Soviets have made their way into Western gyms and physical
therapy treatment centers.
Even
the space program has found a benefit from the research. This breakthrough could
help astronauts, who generally loose bone density in zero gravity, in
maintaining healthy bones and resisting the problems of atrophy in outer space.
But
it’s the cat’s “healing by association” that most people find
interesting: that ability of a cat to sympathetically help cure illnesses in
people simply by being around them. Studies have also shown that owners,
especially senior citizens, who have cats have lower blood pressure and can live
longer than humans who don't own pets.
Many
individuals swear they can ease or completely eliminate their migraine headaches
simply by lying down with a purring cat next to their head.
Can't
hit that minimum recommended daily dose of bone-enriching calcium? Maybe
grabbing the nearest cat and holding it close may just prove to be the answer to
brittle-bones.
Having
surgery? Perhaps after coming home, keeping a cat nearby will reduce your
recovery time.
So,
go get a cat. Keep it happy and purring. You’re both likely to be healthier
and you’ll have a great friend who truly understands how you’re feeling.
*
Lev
G. Fedyniak,
MD began his medical career in alternative medicine, studying acupuncture, herbs
and other healing traditions in China, Hong Kong, Canada, Ukraine and other
parts of the world. Recognizing that the allopathic tradition was a necessary
component in treating illness, he trained in allopathic medicine to obtain the
Doctor of Medicine (MD) degree.
Dr.
Lev makes his home in Ukraine and continues to study new approaches to treating
illness and optimizing health from traditions all over the world. He publishes
articles and books in the hopes of bringing such information to all who need it.
He
can be reached at
DrLev@IntegrativeMedicineOnline.com.
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