Single-unit leadless EEG sensor
First Claim
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1. An EEG sensor, comprising:
- a housing having a circular perimeter and defining a cavity;
an EEG electrode assembly including at least three boot-shaped EEG electrodes fixed with respect to each other, wherein the at least three boot-shaped EEG electrodes are arcuate electrodes situated at the circular perimeter of the housing;
a differential amplifier situated within the cavity and coupled to the at least three boot-shaped EEG electrodes such that first and second boot-shaped EEG electrodes are coupled to respective differential amplifier inputs and a third boot-shaped EEG electrode is coupled to the differential amplifier as a reference so as to produce an output signal associated with the at least three boot-shaped EEG electrodes; and
a plurality of hooks situated on a distal surface of each of the boot-shaped EEG electrodes and operable to secure at least the three boot-shaped EEG electrodes to a surface of a subject, wherein a proximal surface of each of the boot-shaped electrodes defines a gap so that each of the boot-shaped EEG electrodes is adapted to conform to the surface of the subject.
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Abstract
Single-unit EEG sensors contain multiple closely spaced dry electrodes that can hook onto skin and associated electronic circuitry such as amplifiers, A/D convertors, wireless transmitters, and a power source such as a battery. The electrodes can be separated by about 20 mm or less, and the associated circuitry can be situated within a volume defined by the multiple electrodes. The single-unit sensors hook onto the skin using a tooth surface so that a rotation of the sensor secures and electrically connects the sensor to the skin.
6 Citations
23 Claims
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1. An EEG sensor, comprising:
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a housing having a circular perimeter and defining a cavity; an EEG electrode assembly including at least three boot-shaped EEG electrodes fixed with respect to each other, wherein the at least three boot-shaped EEG electrodes are arcuate electrodes situated at the circular perimeter of the housing; a differential amplifier situated within the cavity and coupled to the at least three boot-shaped EEG electrodes such that first and second boot-shaped EEG electrodes are coupled to respective differential amplifier inputs and a third boot-shaped EEG electrode is coupled to the differential amplifier as a reference so as to produce an output signal associated with the at least three boot-shaped EEG electrodes; and a plurality of hooks situated on a distal surface of each of the boot-shaped EEG electrodes and operable to secure at least the three boot-shaped EEG electrodes to a surface of a subject, wherein a proximal surface of each of the boot-shaped electrodes defines a gap so that each of the boot-shaped EEG electrodes is adapted to conform to the surface of the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electrode assembly, comprising:
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a cylindrical substrate; and at least three electrodes secured to the cylindrical substrate, each of the at least three electrodes having a toothed distal surface adapted for attachment to a skin surface, wherein the at least three electrodes are secured to a circular perimeter of a distal surface of the cylindrical substrate and each of the at least three electrodes includes an attachment portion coupled to the cylindrical substrate at the circular perimeter and an extension that extends from the attachment portion and defines a gap from the cylindrical substrate along at least a portion of the extension, and the toothed distal surface is a distal surface of the extension and includes a plurality of teeth. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An electrode assembly, comprising:
- an electrode substrate; and
at least three electrodes situated at a perimeter of the electrode substrate, each of the at least three electrodes having a distal surface having a toothed surface for attachment to a skin surface, wherein the toothed surface includes a plurality of teeth, each of the plurality of teeth having a plurality of gold-coated nanowires secured to the toothed surface.
- an electrode substrate; and
Specification