System for evoking electroencephalogram signals
First Claim
1. A system for passively evoking a desired electroencephalogram signal from a brain of a user of the system, comprising:
- detecting means for detecting a physiological change in the user'"'"'s body and producing a signal indicative of the detected physiological change;
filtering means for extracting a desired electroencephalogram signal from the signal detected by said detecting means; and
stimulating means for applying, as a stimulative signal, one of a photic, aural and vibratory signal to the user, the frequency of the applied stimulative signal being in synchronism with the frequency of said extracted electroencephalogram signal in order passively to evoke the desired electroencephalogram signal from the user.
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Abstract
A physiological change in the body of a user such as a brain wave or EEG signal is detected by electrodes attached to the scalp of the user. A frequency signal corresponding to a brain wave to be evoked is extracted by a bandpass filter from a signal which indicates the detected physiological change. The frequency signal is then applied to a stimulus generator which converts the frequency signal to a stimulative signal such as a photic stimulus and feeds the stimulative signal back to the user'"'"'s body. The brain wave to be evoked is strongly synchronized by the stimulative signal applied to the user to place the user quickly into a desired brain wave state. The stimulative signal well matches the user'"'"'s body since it originates from the signal representing the physiological change in the body of the user.
67 Citations
60 Claims
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1. A system for passively evoking a desired electroencephalogram signal from a brain of a user of the system, comprising:
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detecting means for detecting a physiological change in the user'"'"'s body and producing a signal indicative of the detected physiological change; filtering means for extracting a desired electroencephalogram signal from the signal detected by said detecting means; and stimulating means for applying, as a stimulative signal, one of a photic, aural and vibratory signal to the user, the frequency of the applied stimulative signal being in synchronism with the frequency of said extracted electroencephalogram signal in order passively to evoke the desired electroencephalogram signal from the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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60. A system for passively evoking desired electroencephalogram signals from right and left cerebral hemispheres, respectively, of a brain of a user, the system, comprising:
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detecting means for detecting physiological changes relative to the right and left cerebral hemispheres of the user; a plurality of bandpass filters for extracting first and second frequency signals from the signals detected by said detecting means, said first and second extracted frequency signals corresponding to detecting physiological changes relative to the right and left cerebral hemisphere of the user'"'"'s body, respectively; level adjusting means for adjusting amplitude levels of the extracted first and second frequency signals to respective predetermined levels; and stimulating means, coupled to said level adjusting means, for applying, to the left cerebral hemisphere of the user, a first photic stimulative signal in synchronism with the adjusted first extracted frequency signal, and for applying, to the right hemisphere of the user, a second photic stimulative signal in synchronism with the adjusted second extracted frequency, thereby passively evoking the desired electroencephalogram signals from the user.
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Specification