Cognionics | Date: 2012-09-10
An assembly for reducing motion artifacts that includes an opening on the face of the assembly, an elastic material at least partially covering the opening for suspending objects above the opening, and a sensor attached to the elastic material wherein the sensor is suspended over the opening so that the sensor may be moved in the direction of the opening so that it at least partially recesses into the opening when the sensor is positioned against a subject. The tension on the elastic material generates a force on the sensor directed towards the subject as the elastic material is stretched. Methods and systems of reducing motion artifacts including methods and systems using the assembly are also claimed.
Cognionics | Date: 2013-03-15
A transducer assembly including a support terminal and at least one probe extending from the support terminal is adapted to enable a transducer to penetrate and slide through patches of hair covering a subject area of a person. The probe includes at least one leg structure supporting a transducer disposed at the distal end of the leg structure for sensing or stimulating the state of a particular property of a selected subject area when the transducer is applied by the leg structure to the selected subject area. The leg structure is so disposed in relation to the support terminal as to be disposed at a non-perpendicular angle to the subject area when the transducer assembly is applied to the selected subject area. The leg structure is adapted to flex when the transducer is applied under pressure to the selected subject area to thereby cause the transducer to slide on the subject area.
Cognionics | Date: 2014-03-06
Electrode impedances on a body of a subject are measured by connecting a sense electrode, a reference electrode and a return electrode to the body, using the sense electrode to deliver a test current from a current source to the body of the subject, and measuring the potential difference between the sense electrode and the reference electrode. The impedance of the sense electrode on the body is measured in accordance with the measurement of the potential difference between the sense electrode and the reference electrode.
Cognionics | Date: 2012-10-19
A biopotential electrode for transferring electrical signals with a subject that includes an electrical conductor, a membrane selectively permeable to ionic conduction for presenting a dry surface to the subject, and a conductive medium positioned in communication with a portion of the electrical conductor and a portion of the membrane. The electrical potentials are coupled from the subject across the membrane into the conductive medium and then transferred from the subject to the electrical conductor. In other embodiments, the electrical potentials may be transferred from the external conductor to the subject through the conductive medium across the membrane into the subject. Other embodiments include systems and methods for using the biopotential electrodes.
Agency: Department of Defense | Branch: Defense Advanced Research Projects Agency | Program: SBIR | Phase: Phase II | Award Amount: 1000.00K | Year: 2014
This SBIR project is designed to meet the demand for more accessible EEG devices by providing anyone - neuroscientists, entrepreneurs, hackers, students and the general public - the first complete system, that enables reliable acquisition and advanced pro