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A method and apparatus for use in controlling a device or process. The first step of the method involves attaching a detector (20) adapted to detect mechanical vibrations to a person's head (22). A second step involves detecting mechanical vibrations elicited by sudden contact of upper teeth (24) an

A method and apparatus for use in controlling a device or process. The first step of the method involves attaching a detector (20) adapted to detect mechanical vibrations to a person's head (22). A second step involves detecting mechanical vibrations elicited by sudden contact of upper teeth (24) and lower teeth (26). A third step involves using the mechanical vibrations to trigger a signal to control operation of a device or process (36, 80, 82, 84, 86, 88, 90).

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1. A method for assisting a person in controlling one or more devices, comprising the steps of:a) attaching a vibration sensor, capable of detecting mechanical vibrations, either i. to the person's head; or ii. under the skin over a bony mastoid process or over a temporomandibular joint; b) providin

1. A method for assisting a person in controlling one or more devices, comprising the steps of:a) attaching a vibration sensor, capable of detecting mechanical vibrations, either i. to the person's head; or ii. under the skin over a bony mastoid process or over a temporomandibular joint; b) providing one or more devices capable of causing or stimulating movement of a body part of the person; c) detecting with the sensor, mechanical vibrations elicited by sudden contact of the person's upper teeth and lower teeth; d) generating an electrical signal from the sensed mechanical vibrations; and e) transmitting the electrical signal to the one or more devices to be controlled so as to cause or stimulate movement of the person's body part. 2. The method according to claim 1, wherein the sensor is an accelerometer.3. The method according to claim 2, wherein steps, (c), (d), and (e) take place in an encapsulation under the skin.4. The method according to claim 1, wherein the device being controlled is one capable of stimulating muscles or nerves, or is an active orthosis or prosthesis.5. The method according to claim 4, wherein the sensor is attached on a side of the person's head.6. The method according to claim 4, wherein the sensor is attached to the person's head over a bony mastoid process or over a temporomandibular joint.7. The method according to claim 6, wherein the sensor is an accelerometer or a microphone.8. The method according to claim 6, wherein the sensor is an accelerometer.9. The method according to claim 8, wherein the sensor is attached to the person's head for detecting the vibrations using one or more attachment devices selected from the group consisting of an adhesive, an adhesive tape, an elastic headband, a spring loaded headpiece, and a pair of glasses with springy arms.10. The method according to claim 9 or 3, wherein in step (e) the electrical signal is transmitted to an electronic controller adapted to produce an output signal to control the one or more devices.11. The method according to claim 10, wherein the device being controlled is a cuff equipped with electrodes that stimulate muscles in the person's hand.12. The method according to claim 4, wherein the sensor is attached to the person's head at a location to sense the mechanical vibrations of the person's bony mastoid process.13. The method according to claim 4, wherein the sensor is attached to the person's head at a location to sense the mechanical vibrations of the person's temporomandibular joint.14. The method according to claim 1, wherein the device being controlled is a cuff capable of stimulating the muscles in the person's hand.15. The method according to claim 11, wherein the controller discriminates a temporal pattern or intensity from the electrical signal, and generates a corresponding output signal to control the one or more devices.16. The method according to claim 15, further comprising amplifying the electrical signal.17. The method according to claim 16, further comprising filtering the electrical signal to attenuate signals corresponding to vibrations unrelated to tooth clicks.18. The method according to claim 17, wherein the controller includes a logic circuit to recognize selectively tooth click related components of the electrical signal.19. The method according to claim 18, wherein the output signal is directed to a signal generator that generates trains of electrical pulses operative to stimulate muscles or nerves.20. The method according to claim 19, wherein in step (e) the electrical signal or the output signal is transmitted using a wire, wireless or fibre optic transmitter or a passive transponder, and wherein the controller includes a receiver capable of receiving the transmitted electrical signal.21. An apparatus for use with one or more devices, comprising:a vibration sensor capable of detecting mechanical vibrations elicited by sudden contact of the person's upper teeth and lower teeth and of generating an electrical signal from the sensed mechanical vibrations for transmitting to the one or more devices; and either: i. an attachment device for attaching the vibration sensor to the person's head for detecting the mechanical vibrations; or ii. an encapsulation of the sensor for placement under the skin over a bony mastoid process or over a temporomandibular joint; wherein the one or more devices being controlled is capable of causing or stimulating movement of a body part of the person. 22. The apparatus according to claim 21, wherein the sensor is an accelerometer.23. The apparatus according to claim 22, further comprising means for transmitting the electrical signal to the one or more devices, and wherein when the apparatus includes an encapsulation of the sensor for placement under the skin, the encapsulation further encapsulating the means for transmitting the electrical signal.24. The apparatus according to claim 23, wherein the means for transmitting is a wireless transmitter or a passive transponder, and wherein the electronic controller includes a receiver capable of receiving the transmitted electrical signal.25. The apparatus according to claim 21, wherein the device being controlled is one capable of stimulating muscles or nerves, or is an active orthosis or prosthesis.26. The apparatus according to claim 25, wherein the attachment device is adapted to attach the sensor on a side of the person's head.27. The apparatus according to claim 25, wherein the attachment device is adapted to attach the sensor to the person's head over the bony mastoid process or over the temporomandibular joint.28. The apparatus according to claim 26, wherein the sensor is an accelerometer or a microphone.29. The apparatus according to claim 27, wherein the sensor is an accelerometer.30. The apparatus according to claim 29, which further comprises means for transmitting the electrical signal to the one or more devices to be controlled.31. The apparatus according to claim 30, wherein the attachment device is selected from the group consisting of an adhesive, an adhesive tape, an elastic headband, a spring loaded headpiece, and a pair of glasses with springy arms.32. The apparatus according to claim 31 or 23, which further comprises an electronic controller adapted to receive the transmitted electrical signal and to produce an output signal to control the one or more devices.33. The apparatus according to claim 32, wherein the device being controlled is a cuff equipped with electrodes that stimulate muscles in the person's hand.34. The apparatus according to claim 25, wherein the attachment device is adapted to attach the sensor to the person's head at a location to sense the mechanical vibrations of the person's bony mastoid process.35. The apparatus according to claim 25, wherein the attachment device is adapted to attach the sensor to the person's head at a location to sense the mechanical vibrations of the person's temporomandibular joint.36. The apparatus according to claim 21, wherein the device being controlled is a cuff capable of stimulating the muscles in the person's hand.37. The apparatus according to claim 33, wherein the controller discriminates a temporal pattern or intensity from the electrical signal, and generates a corresponding output signal to control the one or more devices.38. The apparatus according to claim 37, further comprising an amplifier for amplifying the electrical signal.39. The apparatus according to claim 38, further comprising a filter for filtering the electrical signal to attenuate signals corresponding to vibrations unrelated to tooth clicks.40. The apparatus according to claim 39, wherein the controller includes a logic circuit to recognize selectively tooth click related components of the electrical signal.41. The apparatus according to claim 40, wherein the output signal is directed to a signal generator that generates trains of electrical pulses operative to stimulate muscles or nerves.42. The apparatus according to claim 41, wherein the means for transmitting is a wire, wireless or fibre optic transmitter or a passive transponder, and wherein the controller includes a receiver capable of receiving the transmitted electrical signal.