Apparatus and method for optimized stimulation of a neurological target
First Claim
1. An implantable signal router, comprising:
- a plurality of inputs each configured to receive signals from an implantable stimulator;
a plurality of outputs each configured to electrically communicate with a respective microelectrode; and
a routing circuit comprising a plurality of switches, the routing circuit coupled with each of the plurality of inputs and each of the plurality of outputs, the routing circuit configured to;
selectively interconnect, with at least one switch of the plurality of switches, a first of the plurality of inputs with a first two or more outputs of the plurality of outputs;
route a first signal from the first of the plurality of inputs to the first two or more outputs of the plurality of outputs;
selectively interconnect, with a second at least one switch of the plurality of switches, a second of the plurality of inputs with a second two of more outputs of the plurality of outputs; and
route a second signal from the second of the plurality of inputs to the second two or more outputs of the plurality of outputs.
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Accused Products
Abstract
A preferred frequency is identified, being usable to stimulate a neurological target within a mammalian body using at least one microelectrode positioned at or near the target. To establish efficient and effective stimulation, an impedance analyzer is provided for measuring electrical impedance values indicative of a microelectrode-tissue interface across a range of different frequencies. A preferred one of the measured electrical impedance values is identified as being closest to a pure resistance. The neurological target can then be stimulated at or near the frequency associated with the preferred impedance value (peak resistance frequency), thereby promoting desirable traits, such as optimum charge transfer, minimum signal distortion, increased stimulation efficiency, and prevention of microelectrode corrosion. The peak resistance frequency can be used to determine an preferred pulse shape. A target can be identified by microelectrode measurements of neuronal activity and/or impedance magnitude at peak resistance frequency.
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Citations
19 Claims
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1. An implantable signal router, comprising:
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a plurality of inputs each configured to receive signals from an implantable stimulator; a plurality of outputs each configured to electrically communicate with a respective microelectrode; and a routing circuit comprising a plurality of switches, the routing circuit coupled with each of the plurality of inputs and each of the plurality of outputs, the routing circuit configured to; selectively interconnect, with at least one switch of the plurality of switches, a first of the plurality of inputs with a first two or more outputs of the plurality of outputs; route a first signal from the first of the plurality of inputs to the first two or more outputs of the plurality of outputs; selectively interconnect, with a second at least one switch of the plurality of switches, a second of the plurality of inputs with a second two of more outputs of the plurality of outputs; and route a second signal from the second of the plurality of inputs to the second two or more outputs of the plurality of outputs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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selectively interconnecting, with at least one switch, a first of a plurality of inputs of an implantable signal router with a first two or more outputs of a plurality of outputs of the implantable signal router; receiving, by the one of the plurality of inputs, a signal generated by an implantable simulator; routing the signal from the first of the plurality of inputs to the first two or more outputs of the plurality of outputs; outputting the signal from the first two or more outputs of the plurality of outputs; selectively interconnecting, with a second at least one switch, a second of the plurality of inputs of the implantable signal router with a second two of more outputs of the plurality of outputs of the implantable signal router; receiving, by the one of the plurality of inputs, a second signal generated by the implantable simulator; routing the second signal from the second of the plurality of inputs to the second two or more outputs of the plurality of outputs; and outputting the second signal from the second two or more outputs of the plurality of outputs. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification