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Stimulation of cauda-equina spinal nerves

  • US 4,633,889 A
  • Filed: 12/12/1984
  • Issued: 01/06/1987
  • Est. Priority Date: 12/12/1984
  • Status: Expired due to Fees
First Claim
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1. A nerve-stimulating electrode assembly for delivering stimulating signals through body fluid to spinal nerves within the lower end of the vertebral column, comprising:

  • an elongated core;

    a first spiral-wound coil of insulated wire on the core between the core ends, the ends of the wire being uninsulated and wound over the respective ends of the coil to form a pair of first electrodes at opposite ends of the core; and

    means for enabling charge injection through a body fluid to a group of nerves, while deterring direct electrode contact with a nerve surface;

    said enabling means comprising a plurality of insulating spacers on the core on opposite sides of each electrode, said spacers being larger in outside dimension than said electrodes, whereby said electrodes are recessed between said spacers.

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