Apparatus and methods for feedback based nerve modulation
A device according to some embodiments may include a housing configured for location external to a body of a subject. The device may also include at least one processor associated with the housing and configured to communicate with a circuit implanted in the subject within proximity to a tongue of the subject, wherein the circuit is in electrical communication with at least one electrode, receive a physiological signal from the subject via the circuit, and send a control signal to the implanted circuit in response to the physiological signal, wherein the control signal is predetermined to activate neuromuscular tissue within the tongue.
1. A method of activating neuromuscular tissue with an implanted circuit, comprising:
communicating with the implanted circuit, which is implanted within a proximity of a tongue of a subject, wherein the implanted circuit is in electrical communication with at least one electrode;
receiving a physiological signal from the subject via the implanted circuit;
sending a control signal to the implanted circuit in response to the physiological signal; and
activating neuromuscular tissue within the tongue of the subject via the control signal.
2. A device, comprising:
a housing configured for location external to a body of a subject; and
at least one processor associated with the housing and further configured to:
communicate with a circuit implanted in the subject within proximity to at least one nerve to be modulated, wherein the circuit is in electrical communication with at least one electrode;
receive a physiological signal from the subject and
send a control signal to the implanted circuit in response to the physiological signal, wherein the control signal is predetermined to modulate the at least one nerve to be modulated.
3. The device of claim 2 , wherein the processor is configured to send the control signal within a response time between 1 millisecond and 10 minutes.
4. The device of claim 2 , further comprising an antenna configured to transmit the control signal from the location outside of the subject's body to an antenna associated with the implanted circuit.
5. The device of claim 2 , wherein the at least one processor is configured to determine, based on the physiological signal, a quantity of energy to be sent via the control signal to the circuit implanted in the subject.
6. The device of claim 2 , wherein the at least one processor is further configured to determine a physiological condition based on the physiological signal and vary a power level associated with the control signal based on the determined physiological condition.
7. The device of claim 2 , wherein the at least one processor is further configured to determine a physiological condition based on the physiological signal and vary a duration associated with the control signal based on the determined physiological condition.
8. The method of claim 1 , wherein the control signal is sent within a response time chosen from among the group comprising 1 second, 500 milliseconds, 200 milliseconds, 100 milliseconds, 50 milliseconds, 20 milliseconds, 5 milliseconds, and 1 millisecond.
9. The method of claim 1 , wherein the physiological signal is received by a unit located external to the body of the subject, and the control signal is sent from the unit.
10. The method of claim 1 , wherein the physiological signal includes at least one aspect indicative of a movement of the tongue.
11. The method of claim 1 , wherein movement of the tongue is detected via a relative motion between an antenna located external to the body of the subject and an antenna associated with the implanted circuit.
12. The method of claim 1 , further comprising determining, based on the physiologic signal, a quantity of energy to be sent to the implanted circuit via the control signal.
13. The method of claim 1 , further comprising:
detecting a sleep disordered breathing event based on the physiological signal; and
generating the control signal to be sent based on the detected sleep disordered breathing event.
14. The method of claim 13 , wherein generating the control signal to be sent includes determining a power level for the control signal based on a determined severity of the sleep disordered breathing event.
15. The method of claim 13 , wherein generating the control signal to be sent includes determining a time duration for the control signal based on a determined severity of the sleep disordered breathing event.
16. The method of claim 13 , wherein the sleep disordered breathing event may be a precursor of sleep apnea.
17. The method of claim 1 , wherein activating neuromuscular tissue within the tongue causes the subject's tongue to move in a direction away from a posterior pharyngeal wall of the subject.
18. The method of claim 1 , wherein the physiological signal is indicative of an efficiency of energy transfer between the housing and the circuit, and generating the control signal to be sent includes determining a power level based on the efficiency of energy transfer and an upper threshold associated with the implant circuit.
19. The method of claim 1 , wherein the physiological signal is indicative of an efficiency of energy transfer between the housing and the circuit, and generating the control signal to be sent includes determining a power level based on the efficiency of energy transfer and an efficacy threshold associated with the implant circuit.