Magnetic nerve stimulator

Details Magnetic nerve stimulator Magnetic nerve stimulator

1990-06-29

1991-11-19

Jaworski, Francis

Surgery

Magnetic field applied to body for therapy

600 14, 128421, A61N 100

Patent

active

050662724

ABSTRACT:
A magnetic nerve stimulator comprises a capacitor which is charged to a high voltage, then discharged through a coil placed near the head. The magnetic field produced induces eddy currents in the brain that stimulate neurons. When the capacitor is fully discharged, the discharge path is broken by opening a switch. The inductive action of the coil forces a diode to turn on and the energy from the collapsing magnetic field around the coil charges a second capacitor. The charge on the second capacitor is augmented by a power source to make up for any losses, and the process is repeated. The stimulator of the invention can pulse rapidly, does not cause excessive heating of the coil, and uses comparatively little energy. As a result, high level cognitive functions in the brain can be disrupted for diagnostic purposes.

REFERENCES:
patent: 3698398 (1972-10-01), Berkovits
patent: 3841306 (1974-10-01), Hallgren
patent: 4121594 (1978-10-01), Miller et al.
patent: 4672951 (1987-06-01), Welch
patent: 4940453 (1990-07-01), Cadwell
patent: 4974114 (1990-11-01), Kammerer

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