Extracorporeal Magnetic Innervation (ExMI&TM;)is based on the principle described by
Faraday's Law of Magnetic Induction. In the mid-1800s, Faraday demonstrated
that muscular contractions could be induced by the application of a
time-varying magnetic field. ExMI technology is a highly advanced
and sophisticated implementation of this basic principle, designed to help
physicians manage the complex medical problem of urinary incontinence.
ExMI technology works by producing a highly focused, time-varying magnetic
field that penetrates deep into the perineum, innervating the pelvic
floor muscles by activating motor neurons. Pulses of steep gradient
magnetic flux are produced by the therapy head. These fields penetrate
the patient's perineum and initiate nerve impulses. The time-varying
magnetic field creates an electrical potential, which causes an ion flow,
or Eddy currents, in the tissues. This ion flow results in a depolarization
of resting motor neuron membrane potentials. When a threshold potential
is reached, an action potential is initiated for that neuron. This action
potential then propagates naturally along the axion via the usual Na+ and
K+ ion flows. Once these impulses reach the motor end plates, the
musculature of the pelvic floor responds by contracting at a rate equal
to the output pulse rate of the therapy head. The muscles contract and
relax with each pulse. If the output pulse rate exceeds that of the
muscles' ability to contract and relax, the result is a constant, or
steady, contraction of the muscles.
Simply put, ExMI technology induces nerve impulses, which cause muscle
contractions and increase circulation.