Studies in the Osteopathic
Basic Principles: Volume
Louisa Burns, M.S., D.O., D.Sc.O.
THE EXPERIMENTAL DEMONSTRATION OF THE OSTEOPATHIC CENTERS:
THE PELVIC VISCERA.
The experiments upon the pelvic viscera are not yet complete. The
centers have been fairly well demonstrated, but the pathway of the nerve
impulses concerned in the reflexes has not been determined. The following
experiments were performed upon animals.
electrical stimulation of the rectum was followed by contraction of the
muscles near the fourth lumbar vertebra and the lumbo-sacral articulation.
Stimulation of the anus and urethra caused muscular contractions over the
sacrum and along the tail. Sometimes, but not always, the leg muscles
were also contracted.
manipulations of the tissues near the lumbo-sacral articulation were followed
by imperfect movements of defecation, erection, or micturition. Artificial
lesions involving the lower lumbar region caused dilatation of the arterioles
of the rectum and bladder and the relaxation of the vesical and anal sphincters.
all the centers below the second lumbar vertebra the latent period was
very much longer than in any other region subjected to experiment.
In many of our first experiments we secured no effects whatever from this
region. Probably these failures were due to too great haste in ceasing
of the ovaries and testes caused contraction of the muscles near the dorso-lumbar
Stimulation of the Fallopian tubes, or the double uterus, did not cause
perceptible muscular contractions in many instances, but in some animals
the stimulation of these structures was followed by contractions of the
muscles near the second lumbar vertebra. Stimulation of the uterine
cervix caused contractions of the muscles near the lumbo-sacral articulation.
Stimulation of the lining membranes of the body cavities caused more intense
contractions than did the stimulation of their peritoneal coverings.
manipulations of the dorso-lumbar tissues caused vaso-constriction of the
ovaries. The artificial lesion in this area caused dilation of the
ovarian vessels, as well as the effects described in connection with the
manipulations of the tissues near the second lumbar vertebra produced no
perceptible effects upon the structures of the virgin or non-pregnant uterus
in the time during which the observations were continued. The latent
period is very long in the reactions involving the lumbar segments, and
no other significance can be attributed to our failure in this series.
of the animals subjected to experiment were found to be in various stages
of pregnancy. The following observations were made upon them:
in virgin and non-pregnant animals, stimulation of the uterine cervix caused
muscular contractions near the lumbo-sacral articulation.
of the body of the double uterus caused contraction of the muscles near
the second lumbar vertebra.
contractions were never initiated by the anesthesia, nor by manipulations
of the uterus, nor by the slight electric currents used for the experiments.
manipulations near the second lumbar vertebra caused uterine contractions
which were fairly regular, very strong, and continued until the death of
the animal. These manipulations alone were accompanied by contraction
of the uterine vessels and very great rigidity of the uterine cervix.
of the tissues near the lumbo-sacral articulation, or the maintenance of
the artificial lesion in this region caused the dilatation of the cervical
vessels and relaxation of the cervix. In a few instances, simultaneous
stimulation of the tissues near the second lumber vertebra and inhibition
of the tissues near the lumbo-sacral articulation was followed by partial
delivery of the first foetus, though the period of pregnancy was not complete,
and the animals had been subjected to considerable mutilations of the brain
and thorax during a long period of anesthesia.
cells from the lower triangle of the medulla. Method of Golgi. Objective