EEG d-c voltage shift as a means for detecting the onset of a neurological event
First Claim
1. A system for the detection of neurological disorders of a human patient, the system comprising:
- at least two brain electrodes adapted to be located at a location selected from the group consisting of a portion of a patient'"'"'s scalp and a portion of the patient'"'"'s brain, the electrodes being adapted for the reception of EEG signals;
a control module implanted within the human patient'"'"'s body for transmitting output electrical signals from the control module to the patient'"'"'s brain, responsive to input electrical signals originating in the patient'"'"'s brain, the control module including electronic circuitry for processing the EEG signals;
electrical conducting means for providing electrical connections between the electrodes and the electronic circuitry of the control module, said electronic circuitry of the control module, the electrical conducting means and the at least two electrodes being electrically coupled to provide a means for detecting a neurological event by the processing of at least one EEG signal received from at least one electrode, the processing including the detection of a d-c shift in the received EEG signal, the d-c shift having all of its frequency components below 0.5 Hz; and
external equipment means adapted to be located external to the human patient, for providing communication between the external equipment means and the control module for receiving data transmission from the control module and detecting said neurological disorder responsive to said d-c shift in said EEG signal.
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Accused Products
Abstract
Disclosed herein is a multiple electrode, closed-loop system for the treatment of certain neurological disorders such as epilepsy, migraine headaches and Parkinson'"'"'s disease. Specifically, the present invention combines a multi-electrode array with sophisticated signal processing techniques to achieve reliable detection of the onset of a neurological event (such as an epileptic seizure or migraine headache) typically originating from a focus of limited spatial extent within the brain. It is highly desirable to detect an epileptic seizure at least 5 seconds before the onset of clinical symptoms. Since there is often a d-c shift in the EEG voltage more than 5 seconds before the seizure, disclosed herein is a means for utilizing the d-c shift of the EEG for early detection of the seizure.
533 Citations
19 Claims
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1. A system for the detection of neurological disorders of a human patient, the system comprising:
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at least two brain electrodes adapted to be located at a location selected from the group consisting of a portion of a patient'"'"'s scalp and a portion of the patient'"'"'s brain, the electrodes being adapted for the reception of EEG signals; a control module implanted within the human patient'"'"'s body for transmitting output electrical signals from the control module to the patient'"'"'s brain, responsive to input electrical signals originating in the patient'"'"'s brain, the control module including electronic circuitry for processing the EEG signals; electrical conducting means for providing electrical connections between the electrodes and the electronic circuitry of the control module, said electronic circuitry of the control module, the electrical conducting means and the at least two electrodes being electrically coupled to provide a means for detecting a neurological event by the processing of at least one EEG signal received from at least one electrode, the processing including the detection of a d-c shift in the received EEG signal, the d-c shift having all of its frequency components below 0.5 Hz; and external equipment means adapted to be located external to the human patient, for providing communication between the external equipment means and the control module for receiving data transmission from the control module and detecting said neurological disorder responsive to said d-c shift in said EEG signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification