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Neural stimulation techniques with feedback

  • US 5,702,429 A
  • Filed: 04/04/1996
  • Issued: 12/30/1997
  • Est. Priority Date: 04/04/1996
  • Status: Expired due to Term
First Claim
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1. Apparatus for automatically adjusting action potentials generated in electrically excitable tissue of a living organism by electrical stimulation of said tissue, said apparatus comprising:

  • a stimulation driver for generating in response to a control signal a stimulation pulse having a pulse period and an amplitude;

    stimulation electrode means for coupling said stimulation pulse to said tissue, wherein at least one of said pulse period and said amplitude determines said action potentials generated in said tissue;

    recording electrode means displaced from said stimulation electrode means by a predetermined distance for receiving said action potentials transmitted by said tissue;

    an amplifier for generating a processing signal responsive to said action potentials received by said recording electrode means; and

    a controller for generating said control signal in response to said processing signal, said control signal being adapted for use by said stimulation driver to adjust at least one of said pulse period and said amplitude to maintain said action potentials generated in said tissue at substantially a predetermined action potential level that results in reduced pain experienced by said living organism uniformly with time, wherein said controller comprises means for integrating said processing signal over a predetermined time period beginning at a predetermined time in generating said control signal.

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