Method of positioning electrodes for central nervous system monitoring
First Claim
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1. Method of positioning electrodes in an electrode array comprising at least five electrodes for central nervous system (CNS) monitoring from the forehead of a patient'"'"'s head, the method comprising the steps of:
- positioning a first electrode above the eyebrows to sense a signal from the frontalis and at least one of the corrugator, procerus, and orbicularis muscles of the patient and to detect phasic and tonic activation of facial muscles expressing painful mimic responses;
positioning a second electrode above the first electrode on the fronto-lateral area of the frontal lobe of the patient and on the same hemisphere as the first electrode;
positioning a third electrode above the eyebrows to sense a signal from the frontalis and at least one of the corrugator, procerus and orbicularis muscles of the patient at the opposite hemisphere when compared to the first electrode and to detect phasic and tonic activation of facial muscles expressing painful mimic responses;
positioning a fourth electrode above the third electrode on the fronto-lateral area of the frontal lobe of the patient and on the same hemisphere as the third electrode; and
positioning a fifth electrode on the patient'"'"'s skin;
wherein the at least five electrodes are arranged to distinguish at least two electroencephalography, frontal electromyography and eye movement signals from each other and assess a level of patient sedation.
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Abstract
Method of positioning electrodes in an electrode array, comprising at least five or at least seven electrodes for central nervous system (CNS) monitoring from the forehead of a patient'"'"'s head. The electrodes of the array are optimally located for discriminating EEG, FEMG and EM components from the recorded biopotential signals.
122 Citations
26 Claims
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1. Method of positioning electrodes in an electrode array comprising at least five electrodes for central nervous system (CNS) monitoring from the forehead of a patient'"'"'s head, the method comprising the steps of:
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positioning a first electrode above the eyebrows to sense a signal from the frontalis and at least one of the corrugator, procerus, and orbicularis muscles of the patient and to detect phasic and tonic activation of facial muscles expressing painful mimic responses;
positioning a second electrode above the first electrode on the fronto-lateral area of the frontal lobe of the patient and on the same hemisphere as the first electrode;
positioning a third electrode above the eyebrows to sense a signal from the frontalis and at least one of the corrugator, procerus and orbicularis muscles of the patient at the opposite hemisphere when compared to the first electrode and to detect phasic and tonic activation of facial muscles expressing painful mimic responses;
positioning a fourth electrode above the third electrode on the fronto-lateral area of the frontal lobe of the patient and on the same hemisphere as the third electrode; and
positioning a fifth electrode on the patient'"'"'s skin;
wherein the at least five electrodes are arranged to distinguish at least two electroencephalography, frontal electromyography and eye movement signals from each other and assess a level of patient sedation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Method of positioning electrodes in an electrode array comprising at least five electrodes for central nervous system (CNS) monitoring from the forehead of a patient'"'"'s head, the method comprising the steps of:
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positioning a first electrode above the eyebrows to sense a signal from the frontalis and at least one of the corrugator, procerus and orbicularis muscles of the patient and to detect phasic and tonic activation of facial muscles expressing painful mimic responses;
positioning a second electrode to the temple of the patient at the same side of the head as the first electrode;
positioning a third electrode above the eyebrows to sense a sign from the frontalis and at least one of the corrugator, procerus and orbicularis muscles of the patient at the opposite hemisphere when compared to the first electrode and to detect phasic and tonic activation of facial muscles expressing painful mimic responses;
positioning a fourth electrode to the temple of the patient at the same side of the head as the third electrode; and
positioning a fifth electrode on the patient'"'"'s skin, wherein the at least five electrodes are arranged to measure biopotential signals from both cortical hemispheres for functional comparison to detect non-symmetries between the hemispheres, and to detect eye movements. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. Method of positioning electrodes in an electrode array comprising at least seven electrodes for central nervous system (CNS) monitoring from the forehead of a patient'"'"'s head, the method comprising the steps of:
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positioning a first electrode above the eyebrows to sense a signal from the frontalis and at least one of the corrugator, procerus and orbicularis muscles of the patient and to detect phasic and tonic activation of facial muscles expressing painful mimic responses;
positioning a second electrode above the first electrode on the fronto-lateral area of the frontal lobe of the patient and on the same hemisphere as the first electrode;
positioning a third electrode above the eyebrows to sense a signal from the frontalis and at least one of the corrugator, procerus and orbicularis muscles of the patient at the opposite hemisphere when compared to the first electrode and detect phasic and tonic activation of facial muscles expressing painful mimic responses;
positioning a fourth electrode above the third electrode on the fronto-lateral area of the frontal lobe of the patient and on the same hemisphere as the third electrode;
positioning a fifth electrode on the patient'"'"'s skin;
positioning a sixth electrode to the temple of the patient at the same side of the head as the first electrode; and
positioning a seventh electrode to the temple of the patient'"'"'s head at the same side of the head as the third electrode, wherein the at least seven electrodes are arranged to distinguish at least two of electroencephalography, frontal electromyography and eye movement signals from each other, and to measure biopotential signals from both cortical hemispheres for functional comparison to detect non-symmetries between the hemispheres, and to detect eye movements. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification