Electrode assembly for EEG headset
First Claim
1. An electrode assembly in combination with an EEG headset of the type having a headset liner which is placed over the head of patient and which has apertures and mounting elements for mounting respective electrode assemblies therethrough for placing respective electrode tips thereof in contact with the patient'"'"'s head, said electrode assembly comprising:
- an electrode cylinder including a movable piston disposed in an interior part thereof and having a distal end that is to be disposed facing toward the patient'"'"'s head,at least one mounting element made of a flexible material flexibly mounting the electrode cylinder through a respective aperture in the headset liner, said mounting element having a disk shape and being provided with an inner portion with an annular hole mounting the electrode cylinder therethrough and an outer portion extending beyond the aperture so as to be supported overlapping on the headset liner,an electrode body made of an electrically insulative material having one end portion mounted to the distal end of the piston and an opposite end portion extending away from the distal end of the piston for holding an electrode tip to be placed in contact with the patient'"'"'s head, andan electrode tip made of a conductive material mounted to said opposite end portion of the electrode body and having a conductive lead encapsulated in an insulative shielding connected thereto for transmitting electrical signals obtained by the electrode tip to an external signal processing unit separately from the electrode cylinder, piston, and other parts of said assembly.
2 Assignments
0 Petitions
Accused Products
Abstract
An electrode assembly for an EEG headset has a cylinder and piston, at least one disk-shaped mounting element with an inner portion for mounting the cylinder therethrough and an outer portion overlapping onto the liner of the headset, an electrode body made of insulative material mounted to the piston and holding an electrode tip, and an electrode tip made of conductive material with a wire lead for transmitting electrical signals from the tip to an external signal processing unit separately from the rest of the electrode assembly. Preferably, the mounting element is a pair of rubber washers supporting the cylinder from each side of the liner. The electrode body has a threaded end for threading in the piston, and a central passage for supplying electrolyte gel to the electrode tip. The electrode tip has a disk shape with a relatively large surface area for maintaining good contact with the subject'"'"'s scalp. The electrode body may also have a ball joint between its pistonmounting portion and tip-holding portion other types of electrode tips may be mounted on the assemblies. The headset and electrode structures provide a shorter signal transmission system, which greatly reduces extraneous noise, and allow for direct connection to an external recording or EEG device. The headset may include signal conditioning hardware in the form of a VLSI digital amplifier/signal conditioning unit that can output analog, digital, or telephonic modulated EEG signals, or an FM telemetry system mounted on the headset for wireless transmission.
101 Citations
13 Claims
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1. An electrode assembly in combination with an EEG headset of the type having a headset liner which is placed over the head of patient and which has apertures and mounting elements for mounting respective electrode assemblies therethrough for placing respective electrode tips thereof in contact with the patient'"'"'s head, said electrode assembly comprising:
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an electrode cylinder including a movable piston disposed in an interior part thereof and having a distal end that is to be disposed facing toward the patient'"'"'s head, at least one mounting element made of a flexible material flexibly mounting the electrode cylinder through a respective aperture in the headset liner, said mounting element having a disk shape and being provided with an inner portion with an annular hole mounting the electrode cylinder therethrough and an outer portion extending beyond the aperture so as to be supported overlapping on the headset liner, an electrode body made of an electrically insulative material having one end portion mounted to the distal end of the piston and an opposite end portion extending away from the distal end of the piston for holding an electrode tip to be placed in contact with the patient'"'"'s head, and an electrode tip made of a conductive material mounted to said opposite end portion of the electrode body and having a conductive lead encapsulated in an insulative shielding connected thereto for transmitting electrical signals obtained by the electrode tip to an external signal processing unit separately from the electrode cylinder, piston, and other parts of said assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An EEG headset system, comprising:
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a headset having a liner provided with apertures mounting respective electrode assemblies therethrough, wherein each electrode assembly includes; an electrode cylinder including a movable piston disposed in an interior part thereof, at least one mounting element made of a flexible material flexibly mounting the electrode cylinder through a respective aperture in the liner, said mounting element having a disk shape and being provided with an inner portion with an annular hole mounting the electrode cylinder therethrough and an outer portion extending beyond the aperture so as to be supported overlapping on the liner, an electrode body made of an electrically insulative material having one portion mounted to an end of the piston and another portion for holding an electrode tip, and an electrode tip made of a conductive material mounted to an end of the electrode body and having a conductive lead encapsulated in an insulative shielding connected thereto for transmitting electrical signals obtained by the electrode tip to an external signal processing unit separately from the electrode cylinder and other parts of said assembly. - View Dependent Claims (12, 13)
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Specification