Method and Device for Feedback Control of Neural Stimulation
AssigneeSaluda Medical Pty Ltd
InventorPeter Scott Vallack Single
Life of this patent
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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.
Claims17
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.
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.
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.
Dependencies are inferred from the claim text.