A wearable device worn at a head region of a user includes electrodes for measuring a signal evoked by a visual stimulus. The electrodes include a first dry electrode configured to contact the skin around an car of the user. The se electrodes additionally include a second dry electrode configured to provide a reference signal for the measurement of the signal evoked by the visual stimulus.

A method for calibrating eye information includes receiving eye state data measured during a calibration period, receiving head state data measured during the calibration period, calibrating the eye state data based on the head state data, and generating an eye angle measurement based on the calibrated eye state data. Calibrating the eye state data may include correlating the eye state data with the head state data during a period when a vestibulo-ocular reflex occurs. In some implementations, the eye state data may include eye movement data and the head state data may include head movement data. The calibrated eye state data is considered to have improved accuracy and therefore may be used as a more reliable basis for determining a variety of health conditions.

A method for calibrating eye information includes receiving eye state data measured during a calibration period, receiving head state data measured during the calibration period, calibrating the eye state data based on the head state data, and generating an eye angle measurement based on the calibrated eye state data. Calibrating the eye state data may include correlating the eye state data with the head state data during a period when a vestibulo-ocular reflex occurs. In some implementations, the eye state data may include eye movement data and the head state data may include head movement data. The calibrated eye state data is considered to have improved accuracy and therefore may be used as a more reliable basis for determining a variety of health conditions.

The present invention is both a device and a method for verifying a subject's identity while using a medical device or undergoing a medical diagnostic or therapeutic procedure, particularly at home or at a remote location. The method and device can be used for inpatient and remote sleep and signal analysis with biometric identification. The present invention is further related to the devices and sensors used in executing the method, and includes various embodiments of a method of inpatient and remote sleep analysis.

The present invention is both a device and a method for verifying a subject's identity while using a medical device or undergoing a medical diagnostic or therapeutic procedure, particularly at home or at a remote location. The method and device can be used for inpatient and remote sleep and signal analysis with biometric identification. The present invention is further related to the devices and sensors used in executing the method, and includes various embodiments of a method of inpatient and remote sleep analysis.

A method for providing electrical stimulation to a user, the method comprising: providing an electrical stimulation device, in communication with a controller, at a head region of the user; with the electrical stimulation device, providing a stimulation treatment having a waveform configured for neuromodulation in the user; with the controller, performing an adjustment to the stimulation treatment, wherein performing the adjustment includes: generating a transformed waveform with application of a transfer function to the waveform, wherein the transfer function scales the waveform and selectively attenuates extreme waveform values while maintaining a frequency characteristic of the waveform in the transformed waveform; and applying the transformed waveform with the electrical stimulation device, thereby modulating the stimulation treatment.

An apparatus and method for detecting undiagnosed sleep disordered breathing uses daytime sleepiness and nighttime Obstructive Sleep Apnea (OSA) severity. This involves detecting people with excessive daytime sleepiness (and high likelihood of falling asleep during the day) caused by OSA through objective and subjective daytime and nighttime monitoring. Screening is provided for those who are most likely to be suffering a daytime impact of their sleep apnea and thus most likely to respond positively to a potential diagnosis, and notifying these people is also provided.

An apparatus and method for detecting undiagnosed sleep disordered breathing uses daytime sleepiness and nighttime Obstructive Sleep Apnea (OSA) severity. This involves detecting people with excessive daytime sleepiness (and high likelihood of falling asleep during the day) caused by OSA through objective and subjective daytime and nighttime monitoring. Screening is provided for those who are most likely to be suffering a daytime impact of their sleep apnea and thus most likely to respond positively to a potential diagnosis, and notifying these people is also provided.

A sleep monitoring system (100) including: at least one sensor (114) to sense physiological changes of a subject during a test period, the test period having a plurality of epochs, and being configured to form corresponding sensor information for the plurality of the epochs; at least one controller (120, 190, 194) to: receive the sensor information for the plurality of the epochs from each sensor; derive a hypnodensity profile for each epoch of the plurality of epochs based upon the received sensor information for the epochs; calculate at least one hypnodensity feature based upon the hypnodensity profile for each epoch of the plurality of epochs; determine a composite feature based on the at least one hypnodensity feature over the plurality of epochs; compare the composite feature to a at least one predetermined indicator related to sleep apnea; and determine a presence and/or severity of apnea based upon the comparison.

A system for electrically stimulating a user comprising: a first housing portion defining an array of openings; an array of permeable bodies with portions exposed through the array of openings and wetted with a solution that facilitates electrical coupling between the system and a body region of the user, wherein each permeable body has a cavity at a proximal portion and a distal portion and is configured to transmit the solution to the body region of the user; a substrate region defining an array of protrusions configured to support the array of permeable bodies and composed of a conductive polymer; and a set of conductors in communication with the substrate region and including a first conductor that provides a first subset of the array of permeable bodies with a first polarity and a second conductor that provides a second subset of the array of permeable bodies with a second polarity.