Repetitive visual stimulation to EEG neurofeedback protocols
First Claim
1. A method of measuring sensory and perceptual mechanisms of the brain, and training these mechanisms with feedback, comprising the steps of:
- securing electrodes to a subject'"'"'s scalp;
displaying stimuli to the subject;
receiving an electroencephalographic (EEG) signal from the subject while the stimuli is being displayed;
transmitting the resultant EEG signal to a filter;
narrow band filtering the EEG signal to a predefined frequency;
reconstructing the total evoked brain activity by combining the filter outputs;
feeding back in real-time of the total evoked response comprising at least one steady-state visual evoked potential (SSVEP) component amplitude; and
monitoring, in real-time, the short-term changes in each of the SSVEP component amplitudes, for the interpretation of waxing and waning behavior to reflect variations in sensory and perceptual vigilance for use as criteria for providing feedback for at least one of training, monitoring, and assessment purposes.
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Abstract
An EEG neurofeedback and total evoked brain activity measurement methods utilize minimum ambient EEG activity as stimulant frequencies. A method of using repetitive stimulation in conjunction with EEG neurofeedback protocols is described. Electrodes, attached to a subject'"'"'s scalp, transmit electroencephalographic (EEG) signals from the subject. These signals are in response to the visual and/or auditory stimuli being displayed to the subject. The resultant EEG signals are then filtered at pre-defined frequencies or frequency bands. The output from the filtered EEG signals is then analyzed and monitored for short-term state changes. The invention also uses flicker stimulation, real-time signal filtration and feedback, feedback during audio and visual stimulation derived from filtered outputs, and fundamental and integral harmonics in combination with total evoked response.
32 Citations
12 Claims
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1. A method of measuring sensory and perceptual mechanisms of the brain, and training these mechanisms with feedback, comprising the steps of:
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securing electrodes to a subject'"'"'s scalp; displaying stimuli to the subject; receiving an electroencephalographic (EEG) signal from the subject while the stimuli is being displayed; transmitting the resultant EEG signal to a filter; narrow band filtering the EEG signal to a predefined frequency; reconstructing the total evoked brain activity by combining the filter outputs; feeding back in real-time of the total evoked response comprising at least one steady-state visual evoked potential (SSVEP) component amplitude; and monitoring, in real-time, the short-term changes in each of the SSVEP component amplitudes, for the interpretation of waxing and waning behavior to reflect variations in sensory and perceptual vigilance for use as criteria for providing feedback for at least one of training, monitoring, and assessment purposes. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of measuring sensory and perceptual mechanisms of the brain, either separately or together, and training these mechanisms with feedback, comprising the steps of:
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securing electrodes to a subject'"'"'s scalp; displaying stimuli to the subject; receiving an electroencephalographic (EEG) signal from the subject while the stimuli is being displayed; transmitting the resultant EEG signal to a filter; narrow band filtering the EEG signal to a predefined frequency; reconstructing the total evoked brain activity by combining the filtered waveform outputs; feeding back in real-time of the total evoked response comprising a steady-state visual evoked potential (SSVEP) waveform; and reconstructing, in real-time, an estimate of the SSVEP waveform using the combined filtered waveform outputs for dynamically tracking latency and amplitude for the measurement of sensory and perceptual mechanisms of the brain. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification