System for evoking electroencephalogram signals
Patent 5241967 Issued on September 7, 1993. Estimated Expiration Date: 
June 10, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 10, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3837331 3893450 Apparatus for electrophysiological stimulation Biofeedback device for recognition of wave component and muscle potential component Evoked response audiometer Patent #: 4462411 InventorsApplicationNo. 712999 filed on 06/10/1991US Classes:600/545, With feedback of signal to patient600/27Sensory (e.g., visual, audio, tactile, etc.)ExaminersPrimary: Cohen, Lee S.Assistant: Lacyk, John P. Attorney, Agent or FirmInternational ClassA61B 005/04Foreign Application Priority Data1988-12-23 JPAbstractA 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. | |
