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AssigneeMedtronic, Inc.
InventorsFrans L. H. Gielen, Victor P. J. Duysens, Johan F. M. Gijsberg
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A lead for brain target localization in functional stereotactic brain surgery, the lead having at its distal end a micro-electrode for use in recording single cell discharge patterns so as to identify functional boundaries between brain structures; and a macro-electrode for delivering test stimulation for determining target location for optimal therapeutic benefit and minimum side effects. The macro-test stimulation electrode is carried at the end of the lead length, and has a conventional surface area in the range of 1-20 mm.sup.2 for stimulating chronic stimulation conditions. The micro-electrode is positioned at the distal end of an axially aligned probe which extends distally from the macro-electrode, and has a surface area adapted to enable a single cell recording; e.g., between 0.01 and 1000 .mu.m.sup.2. In an alternate embodiment, the tip micro-electrode is retractable so that the lead can be used for chronic brain stimulation.
A lead for brain target localization, comprising a proximal end and a distal end with a length therebetween, a casing covering the lead over said length, first and second conductors within said casing extending between said proximal and distal ends, and
A system for brain target localization, comprising a stereotactic instrument mountable on a patient's head, a lead comprising a proximal end and a distal end with a length therebetween for use in brain target localization, first and second conductors extending between said proximal and distal ends, a micro-positioner for positioning said lead when held by said stereotactic instrument so that said lead distal end is movable within the patient's brain, stimulation means for delivering test stimulation pulses through said lead, and recording from said lead means for recording cell discharge patterns, said lead further comprising:
Dependencies are inferred from the claim text.