Head-mounted physiological signal monitoring system, devices and methods

A method of collecting electrocardiogram (ECG) signals of a subject having skin comprising steps of:

• placing on the subject's head an eyewear apparatus adapted for acquiring physiological signals comprising eyeglasses frames having temple stems and having a plurality of dry electrodes along the stems, the dry electrodes each comprising an upper surface and a lower surface, the upper surface comprising a single connector and the lower surface comprising a plurality of protruding surface features having an aspect ratio of less than 1.5 and being adapted to in part increase surface area of each electrode contacting the subject's skin for acquiring physiological signals from the subject with a single electrical pathway from the lower surface and its plurality of surface features to the connector, the eyewear apparatus further comprising at least one electronic component and a heads-up display (HUD) adapted to display data and messages to the subject corresponding to physiological signals from the dry electrodes, data related to the physiological signals from the dry electrodes, and/or measured, calculated, or derived metrics;
• measuring electrophysiological signals using the dry electrodes to obtain ECG signals and preparedness data related to the subject's physical ability to complete a defined physical task or activity during which the measurement is performed;
• amplifying and filtering the electrophysiological signals with the at least one electronic component to produce ECG signals;
• determining a preparedness of the subject to perform the defined physical task or activity by comparing a second set of measured electrophysiological signals and preparedness data to stored electrophysiological signals and preparedness data related to the subject's physical ability to complete the physical task or activity or such data for other subjects;
• and
• storing the ECG signals, preparedness data, and/or the preparedness determination with the at least one electronic component for collection or processing, or transmitting the ECG signals, preparedness data, and/or preparedness determination with the at least one electronic component to an additional electronic component for storage, collection or processing.

A method of collecting electrocardiogram (ECG) signals of a subject having skin comprising steps of:

• placing on the subject's head an eyewear apparatus adapted for acquiring physiological signals comprising eyeglasses frames having temple stems and having a plurality of at least four dry electrodes along the stems, the dry electrodes each comprising an upper surface and a lower surface, the upper surface comprising a single connector and the lower surface comprising a plurality of protruding surface features having an aspect ratio of less than 1.5 and being adapted to in part increase surface area of each electrode contacting the subject's skin for acquiring physiological signals from the subject with a single electrical pathway from the lower surface and its plurality of surface features to the connector, the eyewear apparatus further comprising at least one electronic component and at least one haptic actuator adapted to provide tactile feedback to the subject physiological signals from the dry electrodes, data related to the physiological signals from the dry electrodes, and/or measured, calculated, or derived metrics;
• measuring electrophysiological signals using the dry electrodes to obtain ECG signals and preparedness data related to the subject's physical ability to complete a defined physical task or activity during which the measurement is performed;
• amplifying and filtering the electrophysiological signals with the at least one electronic component to produce ECG signals;
• determining a preparedness of the subject to perform the defined physical task or activity by comparing a second set of measured electrophysiological signals and preparedness data to stored electrophysiological signals and preparedness data related to the subject's physical ability to complete the physical task or activity or such data for other subjects;
• and
• storing the ECG signals, preparedness data, and/or the preparedness determination with the at least one electronic component for collection or processing, or transmitting the ECG signals, preparedness data, and/or the preparedness determination with the at least one electronic component to an additional electronic component for storage, collection or processing.