Dry electrode brain wave recording system
AssigneeSam Techology Inc.
InventorsAlan S. Gevins, Donald Durousseau, Joel Libove
Life of this patent
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Abstract
In a medical electroencephalographic EEG system, a hat is placed on the head of the patient. The hat contains a plurality of electrodes conforming to the hat. A circuit board having a low-noise integrated circuit amplifiers may be mounted thereon. In one embodiment each of the electrodes has a number of flexible and elastic fingers, for example 2-16 gum rubber fingers, having a conductive tip at the end of each finger, or flexible fingers made entirely of conductive material. In another embodiment the multi-contact electrode uses fingers which are rigid and connected to a spring-loaded plate. The tips contact the patient's scalp, without conductive gel or liquid, to provide a redundancy of contacts.
Claims20
An electrode hat to detect brain waves from the scalp of a patient in an electroencephalogram EEG system, the hat comprising:
- a hat adapted to fit on the head of the patient;
- a circuit board means within and conforming to the hat;
- a plurality of electrodes mounted on the hat, each electrode comprising a plurality of non-conductive elastic flexible fingers each having a free end portion, a conductive tip means at the end of each finger free end portion to make electrical contact with the scalp of the patient without abrading or hurting the scalp, said tip means including minimally a conductive tip to contact the scalp having a diameter of greater than 0.1-inch at its contact with the scalp, a surface which is smooth, non-pointed and non-abrasive to the scalp, and conductive means to conduct brain wave signals from the tip to said circuit board means;
- and amplifier means mounted on said circuit board means to amplify the brain wave signals.
An electrode hat to detect brain waves from the scalp of a patient in an electroencephalogram EEG system, the structure comprising:
- a helmet adapted to fit on the head of the patient;
- at least one dry electrode mounted on the helmet to contact the scalp without liquid or gel conductive material, said electrode comprising a plurality of stiff conductive fingers each having a free end portion, a plate upon which the fingers of each electrode are mounted, spring means to spring-load said plate relative to said helmet, a tip means at the end of each finger free end portion to contact the scalp of the patient without abrading or hurting the scalp, said tip means including a conductive tip to contact the scalp having a diameter of greater than 0.1-inch at its contact with the scalp, a surface which is smooth, non-pointed and non-abrasive to the scalp, and conductive means including said fingers to conduct brain wave signals from the tips.
Dependencies are inferred from the claim text.