Methods providing biofeedback generally comprising: detecting a brainwave segment present in the brainwaves; reproduction of the segment at a higher octave and rendering said higher frequency as a feedback signal to the person. The feedback signal can be rendered at a higher frequency by any number of octaves, and/or musical harmonies thereof. Feedback frequency and amplitude correspond to shifting frequency and amplitude in the underlying brain/heart activity. Feedback signal is preferably rendered within 100 msec from brainwave detection, and can be administered as treatment using any bandwidth within the electromagnetic spectrum including sub-audio, audio, ultrasonic, light, etc. The feedback signal can be delivered to the same or opposite side of the person relative to the hemisphere generating the signal. Said feedback signal can help balance brainwave activity, forge new neuro-circuits, increase interhemispheric communication, creativity and brain-efficiency thereby improving a full spectrum of nervous system activity from hyperarousal to deep sleep.

Abnormalities in electromagnetic fields in the heart, brain, and stomach, among other organs and tissues of the human body, can be indicative of serious health conditions. Described herein are methods, software, systems and devices for detecting the presence of an abnormality in an organ or tissue of a subject by analysis of the electromagnetic fields generated by the organ or tissue.

Abnormalities in electromagnetic fields in the heart, brain, and stomach, among other organs and tissues of the human body, can be indicative of serious health conditions. Described herein are methods, software, systems and devices for detecting the presence of an abnormality in an organ or tissue of a subject by analysis of the electromagnetic fields generated by the organ or tissue.

A marker coil includes a flexible substrate, a coil formed on the substrate by wiring, and a substrate holding part that is capable of being attached to a testee. A convex shape is formed in one of the substrate and the substrate holding part, and an engaging part for engaging the convex shape is formed in the other one of the substrate and the substrate holding part.

According to one embodiment, a magnetic sensor includes a first magnetic element, a conductive member including a first corresponding portion, an element current circuit configured to supply an element current to the first magnetic element, and a first current circuit configured to supply a first current to the first corresponding portion. The first corresponding portion is along the first magnetic element. The first current includes an alternating current component. The first current includes a first duration of a first current value of a first polarity, a first pulse duration of a first pulse current value of the first polarity, a second duration of a second current value of a second polarity, and a second pulse duration of a second pulse current value of the second polarity. The second polarity is different from the first polarity.

A magnetic field measurement system includes a wearable device having a plurality of wearable sensor units. Each wearable sensor unit includes a plurality of magnetometers and a magnetic field generator configured to generate a compensation magnetic field configured to actively shield the plurality magnetometers from ambient background magnetic fields. A strength of a fringe magnetic field generated by the magnetic field generator of each of the wearable sensor units is less than a predetermined value at the plurality of magnetometers of each wearable sensor unit included in the plurality of wearable sensor units.

A magnetic field measurement system includes a wearable device having a plurality of wearable sensor units. Each wearable sensor unit includes a plurality of magnetometers and a magnetic field generator configured to generate a compensation magnetic field configured to actively shield the plurality magnetometers from ambient background magnetic fields. A strength of a fringe magnetic field generated by the magnetic field generator of each of the wearable sensor units is less than a predetermined value at the plurality of magnetometers of each wearable sensor unit included in the plurality of wearable sensor units.

An information display device includes a component extraction unit configured to extract a requested component from multiple given waveforms that are cut out of multiple signal waveforms based on biological signals that are detected; and a noise component selection unit configured to accept selecting, as a noise component, a result of the extracting from multiple results of the extracting by the component extraction unit, and the noise component selection unit displays the multiple results of the extracting by the component extraction unit and times at which the specific waveforms occur.

An information display device includes a component extraction unit configured to extract a requested component from multiple given waveforms that are cut out of multiple signal waveforms based on biological signals that are detected; and a noise component selection unit configured to accept selecting, as a noise component, a result of the extracting from multiple results of the extracting by the component extraction unit, and the noise component selection unit displays the multiple results of the extracting by the component extraction unit and times at which the specific waveforms occur.

Methods of analysis to extract and assess brain data collected from subject animals, including humans, to detect intentional and unintentional brain activity and other unexpected signals are disclosed. These signals are correlated to higher cognitive brain functions or unintended, potentially adverse events, such as a stroke or seizure, and to translation of those signals into defined trigger events or tasks.