A first, second and third electrode, an electrode contact detection means configured to detect and output a state in which all of the electrodes are in contact with a surface of a measurement target, and control means configured to execute a measurement process of biological information, wherein the electrode contact detection means includes a bias power source configured to apply a voltage to each of the first electrode and the second electrode, a first comparator and a second comparator, and a contact state determination unit configured to determine whether all of the electrodes are in contact with the surface of the measurement target based on outputs of the first comparator and the second comparator, and the control means is configured to execute a process for opening the bias power source and executes the measurement process only when all electrodes are in contact with the surface of the measurement target.

Disclosed herein are devices and methods used with neurostimulation therapy for spinal cord injury. More particularly, embodiments of the present invention relate to a sync pulse detector and methods for synchronizing signals from an implanted neurostimulator with measured physiological responses and other data.

The electrocardiogram measurement apparatus includes: two amplifiers for receiving electrocardiogram signals from a first electrode and a second electrode; one electrode driving unit; a third electrode for receiving an output of the electrode driving unit; an A/D converter connected to an output terminal of each of the two amplifiers and converting analog signals into digital signals; a microcontroller for receiving the digital signals from the A/D converter; and a communication means for transmitting the digital signal, wherein: the microcontroller is supplied with power from a battery; the microcontroller controls the A/D converter and the communication means; and each of the two amplifiers amplifies one electrocardiogram signal so as to simultaneously measure two electrocardiogram signals.

The electrocardiogram measurement apparatus includes: two amplifiers for receiving electrocardiogram signals from a first electrode and a second electrode; one electrode driving unit; a third electrode for receiving an output of the electrode driving unit; an A/D converter connected to an output terminal of each of the two amplifiers and converting analog signals into digital signals; a microcontroller for receiving the digital signals from the A/D converter; and a communication means for transmitting the digital signal, wherein: the microcontroller is supplied with power from a battery; the microcontroller controls the A/D converter and the communication means; and each of the two amplifiers amplifies one electrocardiogram signal so as to simultaneously measure two electrocardiogram signals.

A biopotential can be measured with high accuracy without the electrodes coming into direct contact with the skin and without being affected by any motion artifact. The present invention comprises a first lead which detects a biopotential containing noise components, a second lead which is electrically isolated from the first lead and detects noise components, and a differential amplifier circuit which is input with a first signal output from the first lead and a second signal output from the second lead, and which amplifies and outputs a difference between the first signal and the second signal, wherein a value of an input impedance on the second signal side of the differential amplifier circuit is set so that the noise components detected from the second lead will have a frequency that is higher than a frequency spectrum of the biopotential.

A biopotential can be measured with high accuracy without the electrodes coming into direct contact with the skin and without being affected by any motion artifact. The present invention comprises a first lead which detects a biopotential containing noise components, a second lead which is electrically isolated from the first lead and detects noise components, and a differential amplifier circuit which is input with a first signal output from the first lead and a second signal output from the second lead, and which amplifies and outputs a difference between the first signal and the second signal, wherein a value of an input impedance on the second signal side of the differential amplifier circuit is set so that the noise components detected from the second lead will have a frequency that is higher than a frequency spectrum of the biopotential.

A brainwave signal collecting device includes a main part and an elastic sleeve having a first opening. The main part is installed on the elastic sleeve, and the elastic sleeve can be positioned by suction on a user's head through the first opening after being pressed. The main part is in contact with the head to collect brainwave signals. The brainwave signal collecting device has an elastic sleeve serving as a flexible piece. When the brainwave signal collecting device is worn, the elastic sleeve can be pressed to partly exhaust the air therein so as to be positioned by suction on the head by the first opening of the elastic sleeve, which can improve the comfort of the head in contact with the elastic sleeve; and the position and angle at which the main part contacts the head can be adjusted through the deformation of the elastic sleeve.

A brainwave signal collecting device includes a main part and an elastic sleeve having a first opening. The main part is installed on the elastic sleeve, and the elastic sleeve can be positioned by suction on a user's head through the first opening after being pressed. The main part is in contact with the head to collect brainwave signals. The brainwave signal collecting device has an elastic sleeve serving as a flexible piece. When the brainwave signal collecting device is worn, the elastic sleeve can be pressed to partly exhaust the air therein so as to be positioned by suction on the head by the first opening of the elastic sleeve, which can improve the comfort of the head in contact with the elastic sleeve; and the position and angle at which the main part contacts the head can be adjusted through the deformation of the elastic sleeve.

A computer-implemented method for determining the state of a system, which includes steps of: collecting data relating to a system, the data being noisy data comprising data of interest and noise; generating a signal to be analyzed from the collected data, the signal being a noisy signal comprising a signal of interest and noise; analyzing the regularity of the signal of interest by compensating the influence of the noise in the computation of the power of the difference between the integrated noisy signal and its trend; and determining the state of the system depending on the result of the analysis of the regularity of the signal of interest.

A method and apparatus are disclosed for simultaneously providing a plurality of probe response signals indicative of electrical activity at a respective plurality of locations in a patient. The apparatus comprises a rigid needle shaft element comprising a piercing tip and a substrate supporting a plurality of electrode tracks, secured to the needle shaft element and extending along the shaft element away from the piercing tip. Each electrode track extends from a sensing end region arranged for providing a respective probe response signal responsive to localised electrical activity, along the region of the substrate, to a respective bond pad connection region. Recording surface regions of the plurality of electrode tracks are spaced apart in a plurality of substantially linear spaced apart configurations along the substrate.