Dual electrode lead and method for brain target localization in functional stereotactic brain surgery
First Claim
1. 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, anda first stimulating electrode at said distal end and connected to said first conductor, said first electrode having a surface area in the range of about 1-20 mm2 ;
- anda probe element extending more than 1 mm distally from said first electrode and carrying a micro-electrode at the probe element distal tip, said micro-electrode having a surface area in the range of 0.01 to 1000 μ
m2, and being connected to said second conductor.
1 Assignment
0 Petitions
Accused Products
Abstract
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 mm2 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 μm2. In an alternate embodiment, the tip micro-electrode is retractable so that the lead can be used for chronic brain stimulation.
224 Citations
14 Claims
-
1. 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 first stimulating electrode at said distal end and connected to said first conductor, said first electrode having a surface area in the range of about 1-20 mm2 ; - and
a probe element extending more than 1 mm distally from said first electrode and carrying a micro-electrode at the probe element distal tip, said micro-electrode having a surface area in the range of 0.01 to 1000 μ
m2, and being connected to said second conductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- and
-
10. 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:
-
a first stimulating electrode at said distal end and connected to said first conductor, said first electrode having a surface area in the range of about 1-20 mm2 ; and a probe element extending more than 1 mm distally from said first electrode and carrying a micro-electrode at the probe element distal tip, said micro-electrode having a surface area in the range of 0.01 to 1000 μ
m2, and being connected to said second conductor. - View Dependent Claims (11, 12, 13, 14)
-
Specification