Control system for closed-loop neuromodulation
A control system for a movement reconstruction and/or restoration system for a patient, comprising a sampling module configured and arranged to sample signals describing directly and/or indirectly motion at a sampling rate of at least 50 Hz; at least one stimulation system configured and arranged to provide stimulation for movement reconstruction and/or restoration to the patient; a prediction module configured and arranged to provide a prediction of at least a next movement, especially movement stage and/or sequence, to reduce latency and to synchronize stimulation to the movement phase, wherein the control system further comprises at least one controller, the controller being configured and arranged to provide stimulation control signals to the stimulation system on the basis of the information obtained by the sampling module and the prediction provided by the prediction module.
1. A control system for a movement reconstruction and/or restoration system for a patient, comprising
at least one sensor or sensor network configured to sample signals describing body motion at a sampling rate of at least 50 Hz;
wherein the sensor network is a wireless sensor network;
at least one stimulation system configured to provide stimulation for movement reconstruction and/or restoration to the patient;
a prediction module configured to provide a prediction of at least a next movement to reduce latency and to synchronize stimulation to the movement phase, wherein the control system further comprises at least one controller, the controller being configured to provide stimulation control signals to the stimulation system on the basis of the information obtained by the at least one sensor or sensor network and the prediction provided by the prediction module.
2. The control system according to claim 1 , wherein the sampling rate is at least 75 Hz.
3. The control system of claim 1 , wherein the control system is configured to allow an overall latency budget, the latency budget being distributed to one or more subsystems of the control system.
4. The control system of claim 3 , wherein the allowed overall latency budget is 100 ms or less.
5. The control system of claim 3 , wherein the subsystems include at least one of the at least one sensor or sensor network, a controller, a pulse generator, a programmer, a communication module (COM), a telemetry module (TEL).
6. The control system of claim 5 , wherein the control system is configured and arranged such that the controller has an allowed latency budget between one of 10-15 ms or and 11-13 ms.
7. The control system of claim 5 , wherein the telemetry module comprises a near field magnetic induction module (NFMI).
8. The control system of claim 7 , wherein the control system is configured and arranged such that the telemetry module (TEL) has an allowed latency budget between 5-10 ms and wherein out of the latency budget, a larger part of the latency budget is for waiting time for establishing a telecommunication link and a smaller part of the latency budget is a buffer to accommodate with the technological natural latency of the near field magnetic induction module (NFMI).
9. The control system of claim 5 , wherein the control system is configured and arranged such that the sensor network has an allowed latency budget of approx. 15-20 ms.
10. The control system of claim 5 , wherein the control system is configured and arranged such that the pulse generator has an allowed latency budget of approx. 0.1-3.0 ms.
11. The control system of claim 5 , wherein the control system is configured and arranged such that the controller has an allowed latency budget of approx. 10-14 ms.
12. The control system of claim 5 , wherein the prediction module is connected directly and/or indirectly with the at least one sensor or the sensor network and wherein the prediction module is configured to predict patient motion and/or movement on the basis of sensor input data, or to manage and/or monitor latency of the control system in order to stay within an overall allowed latency budget.
13. The control system of claim 1 , wherein the control system comprises a latency budget monitoring and/or management system, which is configured and arranged to monitor and manage the overall latency of the control system by monitoring and/or managing latency of subsystems of the control system.
14. The control system of claim 1 , wherein the control system is a closed-loop system.
15. The control system of claim 1 , wherein the control system has a pre-warning module, which is configured and arranged to provide a pre-warning signal indicative of providing an upcoming stimulation event.
16. A method for a control system, comprising:
responsive to detecting motion at least one sensor or sensor network configured to detect an indication of movement at a region of a patient;
wherein the sensor network is a wireless sensor network;
sampling data from the at least one sensor or sensor network at a sampling module at a threshold sampling rate;
predicting a motion at the region of the patient by a prediction module;
collecting the data from the at least one sensor or sensor network and the prediction module at a controller configured to process the data; and
stimulating movement at the region of the patient by generating a pulse signal via a stimulation system based on the processed data from the controller.
17. The method of claim 16 , wherein detecting motion at the at least one sensor or sensor network includes receiving three-dimensional accelerations, angular velocities, and orientations from an inertial measurement unit and wherein the inertial measurement unit includes an accelerometer and a gyroscope.
18. The method of claim 16 , wherein sampling data at the at least one sensor or sensor network includes obtaining data from the at least one sensor or sensor network at a minimum rate of 50 Hz.
19. The method of claim 16 , wherein stimulating movement via the stimulation system includes electronically stimulating neurons by at least one of a central nervous system (CNS) stimulation system and a peripheral nervous system (PNS) stimulation system.