Responsive electrical stimulation for movement disorders
First Claim
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1. An implantable neurostimulator for treating a patient comprising:
- a sensor interface for receiving sensed physiological signals from at least one sensor, at least one of the sensed physiological signals corresponding to electrical activity of the brain;
a signal processor for conditioning the signals received from the at least one sensor;
a memory;
a detection subsystem adapted to;
analyze the signals conditioned by the signal processor by extracting a set of parameters from the signals,use the set of extracted parameters to identify a symptom of a movement disorder, the symptom being electrical activity of the brain characterized by a frequency in the range of 3-5 Hz,store in the memory at least one of the extracted parameters, andoutput an indication that the symptom has been identified, the output including a synchronization point; and
a stimulation subsystem adapted to;
receive the output from the detection subsystem indicating that the symptom has been identified,generate a stimulation waveform according to a set of stimulation parameters, anddeliver the stimulation waveform at a time based on the synchronization point.
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Abstract
An implantable neurostimulator system for treating movement disorders includes a sensor, a detection subsystem capable of identifying episodes of a movement disorder by analyzing a signal received from the sensor, and a therapy subsystem capable of supplying therapeutic electrical stimulation to treat the movement disorder. The system treats movement disorders by detecting physiological conditions characteristic of an episode of symptoms of the movement disorder and selectively initiating therapy when such conditions are detected.
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Citations
10 Claims
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1. An implantable neurostimulator for treating a patient comprising:
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a sensor interface for receiving sensed physiological signals from at least one sensor, at least one of the sensed physiological signals corresponding to electrical activity of the brain; a signal processor for conditioning the signals received from the at least one sensor; a memory; a detection subsystem adapted to; analyze the signals conditioned by the signal processor by extracting a set of parameters from the signals, use the set of extracted parameters to identify a symptom of a movement disorder, the symptom being electrical activity of the brain characterized by a frequency in the range of 3-5 Hz, store in the memory at least one of the extracted parameters, and output an indication that the symptom has been identified, the output including a synchronization point; and a stimulation subsystem adapted to; receive the output from the detection subsystem indicating that the symptom has been identified, generate a stimulation waveform according to a set of stimulation parameters, and deliver the stimulation waveform at a time based on the synchronization point. - View Dependent Claims (2, 3, 4, 5)
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6. A method for treating a patient with an implantable neurostimulator, said method comprising:
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receiving sensed physiological signals, at least one of the sensed physiological signals corresponding to electrical activity of the brain; conditioning the signals; analyzing the conditioned signals by extracting a set of parameters from the signals; using the set of extracted parameters to identify a symptom of a movement disorder, the symptom being electrical activity of the brain characterized by a frequency in the range of 3-5 Hz; outputting an indication that the symptom has been identified, the output including a synchronization point; receiving the output from the detection subsystem indicating that the symptom has been identified; generating a stimulation waveform according to a set of stimulation parameters, and delivering the stimulation waveform at a time based on the synchronization point. - View Dependent Claims (7, 8, 9, 10)
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Specification