Apparatus and method for acquiring a signal
First Claim
1. An electrode cap for obtaining EPM signals from a head of a subject, the cap comprising:
- (i) an insulating layer for positioning adjacent to the head of the subject;
(ii) an electrically conductive layer situated above the insulating layer so that in use, it is separated from the head of the subject by the insulating layer;
the electrical conductivity of the electrically conductive layer being predominantly due to ionic conductive means;
(iii) a plurality of measurement signal electrodes extending through the electrically conductive layer and the insulating layer for contacting the head of the subject, the measurement signal electrodes being electrically insulated from the electrically conductive layer; and
(iv) at least one reference node electrically connected to the electrically conductive layer.
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Accused Products
Abstract
An electrode cap for obtaining EPM signals from a head of a subject, the cap comprising: (i) an insulating layer for positioning adjacent to the head of the subject; (ii) an electrically conductive layer comprising ionic conduction means, situated above the insulating layer so that in use, it is separated from the head of the subject by the insulating layer; (iii) a plurality of measurement signal electrodes extending through the electrically conductive layer and the insulating layer for contacting the head of the subject, the measurement signal electrodes being electrically insulated from the electrically conductive layer; and (iv) at least one reference node electrically connected to the electrically conductive layer;
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Citations
47 Claims
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1. An electrode cap for obtaining EPM signals from a head of a subject, the cap comprising:
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(i) an insulating layer for positioning adjacent to the head of the subject;
(ii) an electrically conductive layer situated above the insulating layer so that in use, it is separated from the head of the subject by the insulating layer;
the electrical conductivity of the electrically conductive layer being predominantly due to ionic conductive means;
(iii) a plurality of measurement signal electrodes extending through the electrically conductive layer and the insulating layer for contacting the head of the subject, the measurement signal electrodes being electrically insulated from the electrically conductive layer; and
(iv) at least one reference node electrically connected to the electrically conductive layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An electronic apparatus comprising an electrode cap for obtaining EPM signals from a head of a subject, the cap comprising:
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(i) an insulating layer for positioning adjacent to the head of the subject;
(ii) an electrically conductive layer situated above the insulating layer so that in use, it is separated from the head of the subject by the insulating layer;
the electrical conductivity of the electrically conductive layer being predominantly due to ionic conductive means;
(iii) a plurality of measurement signal electrodes extending through the electrically conductive layer and the insulating layer for contacting the head of the subject, the measurement signal electrodes being electrically insulated from the electrically conductive layer; and
(iv) at least one reference node electrically connected to the electrically conductive layer;
and an electronic circuit, the electronic circuit comprising;
—(a) a plurality of measurement inputs, each connected to a respective one of the measurement signal electrodes; and
(b) at least one, preferably a plurality of reference signal inputs, each connected to a respective one or more of the reference nodes;
said electronic apparatus further comprising subtraction means for subtracting an interference signal from each respective reference signal input from an interference signal from a corresponding measurement signal input or from each respective measurement signal input in a group of measurement signal inputs. - View Dependent Claims (24, 25, 26, 27)
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28. A combined measurement apparatus comprising an MRI or TMS unit and an EPM system which comprises an electronic apparatus comprising an electrode cap for obtaining EPM signals from a head of a subject, the cap comprising:
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(i) an insulating layer for positioning adjacent to the head of the subject;
(ii) an electrically conductive layer situated above the insulating layer so that in use, it is separated from the head of the subject by the insulating layer;
the electrical conductivity of the electrically conductive layer being predominantly due to ionic conductive means;
(iii) a plurality of measurement signal electrodes extending through the electrically conductive layer and the insulating layer for contacting the head of the subject, the measurement signal electrodes being electrically insulated from the electrically conductive layer; and
(iv) at least one reference node electrically connected to the electrically conductive layer;
and an electronic circuit, the electronic circuit comprising;
—(a) a plurality of measurement inputs, each connected to a respective one of the measurement signal electrodes; and
(b) at least one, preferably a plurality of reference signal inputs, each connected to a respective one or more of the reference nodes;
said electronic apparatus further comprising subtraction means for subtracting an interference signal from each respective reference signal input from an interference signal from a corresponding measurement signal input or from each respective measurement signal input in a group of measurement signal inputs. - View Dependent Claims (29, 30, 32)
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- 31. An electrode cap for obtaining EPM signals from the head of a subject, the cap comprising an electrode support means for at least partly covering a head of a subject, a plurality of electrodes being supported on said electrode support means to allow said electrodes to contact the head and bladder means for securing said electrodes relative to the head.
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39. An electronic apparatus comprising an electrode cap for obtaining EPM signals from the head of a subject, the cap comprising an electrode support means for at least partly covering a head of a subject, a plurality of electrodes being supported on said electrode support means to allow said electrodes to contact the head and bladder means for securing said electrodes relative to the head;
and an electronic circuit, the electronic circuit comprising;
—(a) a plurality of measurement inputs, each connected to a respective one of the measurement signal electrodes; and
(b) at least one, preferably a plurality of reference signal inputs, each connected to a respective one or more of the reference nodes;
said electronic apparatus further comprising subtraction means for subtracting an interference signal from each respective reference signal input from an interference signal from a corresponding measurement signal input or from each respective measurement signal input in a group of measurement signal inputs. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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47. An electrode cap for obtaining EPM signals from a head of a subject, the cap comprising:
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(i) an insulating layer for positioning adjacent to the head of the subject;
(ii) an electrically conductive layer situated above the insulating layer so that in use, it is separated from the head of the subject by the insulating layer;
the electrical conductivity of the electrically conductive layer being predominantly due to ionic conductive means; and
(iii) at least one, preferably a plurality of reference nodes electrically connected to the electrically conductive layer.
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Specification