Method and Device for Feedback Control of Neural Stimulation
First Claim
1. A method of controlling a neural stimulus, the method comprising:
- applying the neural stimulus to a neural pathway in order to give rise to an evoked action potential on the neural pathway, the stimulus being defined by at least one stimulus parameter;
measuring a neural compound action potential response evoked by the stimulus, and deriving from the measured evoked response a feedback variable;
completing a feedback loop by using the feedback variable to control the at least one stimulus parameter value; and
adaptively compensating for changes in a gain of the feedback loop caused by electrode movement relative to the neural pathway.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of controlling a neural stimulus by use of feedback. The neural stimulus is applied to a neural pathway in order to give rise to an evoked action potential on the neural pathway. The stimulus is defined by at least one stimulus parameter. A neural compound action potential response evoked by the stimulus is measured. From the measured evoked response a feedback variable is derived. A feedback loop is completed by using the feedback variable to control the at least one stimulus parameter value. The feedback loop adaptively compensates for changes in a gain of the feedback loop caused by electrode movement relative to the neural pathway.
-
Citations
17 Claims
-
1. A method of controlling a neural stimulus, the method comprising:
-
applying the neural stimulus to a neural pathway in order to give rise to an evoked action potential on the neural pathway, the stimulus being defined by at least one stimulus parameter; measuring a neural compound action potential response evoked by the stimulus, and deriving from the measured evoked response a feedback variable; completing a feedback loop by using the feedback variable to control the at least one stimulus parameter value; and adaptively compensating for changes in a gain of the feedback loop caused by electrode movement relative to the neural pathway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. An implantable device for controllably applying a neural stimulus, the device comprising:
-
a plurality of electrodes including one or more nominal stimulus electrodes and one or more nominal sense electrodes; a stimulus source for providing a stimulus to be delivered from the one or more stimulus electrodes to a neural pathway in order to give rise to an evoked action potential on the neural pathway; measurement circuitry for recording a neural compound action potential signal sensed at the one or more sense electrodes; and a control unit configured to; control application of a neural stimulus as defined by at least one stimulus parameter; measure via the measurement circuitry a neural compound action potential response evoked by the stimulus; determine from the measured evoked response a feedback variable; complete a feedback loop by using the feedback variable to control the at least one stimulus parameter value; and adaptively compensate for changes in a gain of the feedback loop caused by electrode movement relative to the neural pathway.
-
-
17. A non-transitory computer readable medium for controllably applying a neural stimulus, comprising the following instructions for execution by one or more processors:
-
computer program code means for applying the neural stimulus to a neural pathway in order to give rise to an evoked action potential on the neural pathway, the stimulus being applied as defined by at least one stimulus parameter; computer program code means for measuring a neural compound action potential response evoked by the stimulus and deriving from the measured evoked response a feedback variable; computer program code means for completing a feedback loop by using the feedback variable to control the at least one stimulus parameter value; and computer program code means for adaptively compensating for changes in a gain of the feedback loop caused by electrode movement relative to the neural pathway.
-
Specification