A wrist rehabilitation training system based on muscle coordination and variable stiffness impedance control includes the following modules: an electromyographic signal collection and preprocessing module, a muscle co-decomposition and mapping model obtaining module, a man-machine interactive control module, and a virtual reality serious game module; collects a surface electromyographic signal of a forearm of a user, obtains time-domain coordination through non-negative matrix factorization, establishes a position and stiffness estimation model, and controls motion of a target in a serious game through variable stiffness impedance control, so as to complete a training task.

A surgical access system including a tissue distraction assembly 40 and a tissue retraction assembly 10, both of which may be equipped with one or more. electrodes 23 for use in detecting the existence of (and optionally the distance and/or direction to) neural structures before, during, and after the establishment of an operative corridor 15 to a surgical target site. The tissue retraction assembly 10 has a plurality of blades 12, 16, 18 which may be introduced while in a closed configuration, after which point they may be opened to create an operation corridor 15 to the surgical target site, including pivoting at least one blade 12, 16, 18 to expand the operative corridor 15 adjacent to the operative site.

A surgical access system including a tissue distraction assembly 40 and a tissue retraction assembly 10, both of which may be equipped with one or more. electrodes 23 for use in detecting the existence of (and optionally the distance and/or direction to) neural structures before, during, and after the establishment of an operative corridor 15 to a surgical target site. The tissue retraction assembly 10 has a plurality of blades 12, 16, 18 which may be introduced while in a closed configuration, after which point they may be opened to create an operation corridor 15 to the surgical target site, including pivoting at least one blade 12, 16, 18 to expand the operative corridor 15 adjacent to the operative site.

A system and method of treating a sleep disorder, including: detecting signals associated with at least one symptom or sign of the sleep disorder at one or more sensors; processing the signals to create a symbolic representation of the sleep disorder, wherein the symbolic representation indicates a relationship of the signals to the sleep disorder empirically and not based on physiologic mapping of the signals to the sleep disorder; and stimulating a region of a human body to alter the symbolic representation between detected signals and the sleep disorder, wherein the symbolic representation as altered indicates treatment of the sleep disorder.

A system and method of treating a sleep disorder, including: detecting signals associated with at least one symptom or sign of the sleep disorder at one or more sensors; processing the signals to create a symbolic representation of the sleep disorder, wherein the symbolic representation indicates a relationship of the signals to the sleep disorder empirically and not based on physiologic mapping of the signals to the sleep disorder; and stimulating a region of a human body to alter the symbolic representation between detected signals and the sleep disorder, wherein the symbolic representation as altered indicates treatment of the sleep disorder.

The present disclosure describes a measurement unit including measurement electronics, a wireless transceiver unit, and a processing. The measurement electronics are configured to measure an EMG signal and a motion signal from a limb of a person. The processing unit is configured to determine a principal component representation of the EMG signal and the motion signal in real time, wherein the principal component representation represents a projection of at least one feature of the EMG signal and at least one feature of the motion signal into at least one uncorrelated feature in a feature space formed by orthogonal basis vectors, and transmit the principal component representation to an external system with the wireless transceiver unit.

The present disclosure describes a measurement unit including measurement electronics, a wireless transceiver unit, and a processing. The measurement electronics are configured to measure an EMG signal and a motion signal from a limb of a person. The processing unit is configured to determine a principal component representation of the EMG signal and the motion signal in real time, wherein the principal component representation represents a projection of at least one feature of the EMG signal and at least one feature of the motion signal into at least one uncorrelated feature in a feature space formed by orthogonal basis vectors, and transmit the principal component representation to an external system with the wireless transceiver unit.

An electromyography (EMG) sensor for a wearable device, such as a prosthetic device attachable to a residual limb, includes a flexible substrate comprising an elongated portion and an electrode portion. At least two electrodes are disposed at a surface of the electrode portion of the flexible substrate, and leads from the at least two electrodes extend through the elongated portion of the flexible substrate.

An electromyography (EMG) sensor for a wearable device, such as a prosthetic device attachable to a residual limb, includes a flexible substrate comprising an elongated portion and an electrode portion. At least two electrodes are disposed at a surface of the electrode portion of the flexible substrate, and leads from the at least two electrodes extend through the elongated portion of the flexible substrate.

A sensor assembly for a prosthetic or orthotic device (POD) may include a housing and a support. The housing may be attached with the POD. The support may be moveably connected with the housing such that the support may move relative to the housing. The support may form an enclosure with the housing. Within the enclosure, the sensor assembly may include one or more sensors and a circuit board. The one or more sensors may include one or more of an inertial measurement unit, an electromyography sensor, or a distance sensor such as a magnetic sensor and a magnet. The circuit board may be attached with the support and in electrical communication with the plurality of sensors. Movement of the support may cause the sensors to move which may be detected for control of the POD. The sensor assembly may be attached to an arm or other prosthetic socket for detection of natural limb movements.