Electroencephalic neurofeedback apparatus and method for bioelectrical frequency inhibition and facilitation

• US 4,919,143 A
• Filed: 06/14/1989
• Issued: 04/24/1990
• Est. Priority Date: 06/14/1989
• Status: Expired due to Term

• Current Assignee: Margaret E. Ayers
• Original Assignee: Margaret E. Ayers
• Inventors: Ayers, Margaret E.
• Primary Examiner(s): Sykes, Angela D.
• Application Number:
  US07/365,717
• Time in Patent Office: 314 Days
• Field of Search: 128/731-732, 128/905, 128/733, 600/26-28
• US Class Current: 600/545
• CPC Class Codes: A61B 5/375 using biofeedback
• CPC Class Codes: Y10S 128/905 Feedback to patient of biological signal other than brain electric signal

Abstract

An improved method and apparatus for displaying and either inhibiting or promoting selected bioelectrical frequencies emitted by a living organism. The method includes the steps of detecting an analog bioelectrical signal, converting the signal to discrete digital signals representing corresponding frequencies and numerically analyzing the digital signals to determine the different bioelectrical frequencies emitted by the organism. Furthermore, a threshold amplitude associated with a selected digital signal can be established an auditory or visual signal can be sent to the organism to indicate whether the bioelectrical frequency under study is within or outside the threshold amplitude. With this information the organism can be taught to inhibit or facilitate the bioelectrical frequency. The apparatus comprises a pair of electrodes, an analog signal amplifier, an analog to digital converter, a selector to select a frequency of interest, a display monitor, and a computer to distinguish the digital signals as different frequencies, display the frequencies, and determine when the frequency is falling inside or outside a predetermined range. Also, a magnetic medium recording device is used to capture data. Finally, a lighting or sounding circuit is used to tell the organism whether the frequency under study is being inhibited or facilitated.

Claims

1. An improved apparatus for inhibiting or producing analog bioelectrical signal frequencies in a person'"'"'s body comprising:

(a) receptor means for attachment to the person'"'"'s body at a location emitting an analog bioelectrical signal of interest;

(b) amplification means for amplifying said analog bioelectrical signal received from said receptor means, said receptor means conveying said analog bioelectrical signal to said amplification means;

(c) analog to digital converter means for converting said analog bioelectrical signal to digital signal representing particular analog frequencies, said analog signal having been amplified is converted to discrete digital signal representing corresponding analog frequencies;

(d) selecting means to select a particular digital signal, said selecting means including a numerical analyzer receiving said discrete digital signals allowing the selection of a particular digital signal corresponding to a particular analog bioelectrical frequency to be inhibited or accentuated and avoiding the delay and distortion of power spectral and bandpass analysis; and

(e) sensation means for giving the person a particular sensation when said particular digital signal is maintained within predetermined ranges of amplitude for a predetermined duration, thereby allowing the person to mentally concentrate so as to inhibit or produce said particular analog bioelectrical signal frequency which can be acknowledged by the person when the person receives said sensation.

2. An improved apparatus as claimed in claim 1, further comprising an integrating means for establishing said predetermined amplitude ranges for a predetermined duration, wherein said means integrates the amplitude of said particular digital signal with respect to duration and divides a resulting value by a pr®

determined amplitude threshold voltage, thereby allowing the determination of whether voltage of said particular digital signal is changing, and thereby whether said corresponding bioelectrical signal frequency is being inhibited or accentuated.

3. An improved apparatus as claimed in claim 2, further comprising a monitor means for displaying said discrete digital signals as a waveform changing with respect to time and displaying said predetermined amplitude ranges.

4. An improved apparatus as claimed in claim 3, further comprising a recording means for recording said digital signals to a magnetic medium for review and data manipulation.

5. An improved apparatus as claimed in claim 4, further comprising a suppression means for suppressing unwanted signals received by said receptor means which can be selectively set to prevent said unwanted signals received by said receptor means from activating said sensing means.

6. An improved apparatus as claimed in claim 5, wherein said receptor means comprising two electrodes associated with said amplifications means, said analog to digital converter means comprising an analog/digital input card which receives said amplified analog bioelectrical signal, said integrating means comprising a numerical processor card which receives said digital signals and processes said signals to represent changing voltage over time.

7. An improved apparatus for displaying electrical frequencies at a desired location of an organism, comprising:

(a) receptor means for attachment to the desired location of the organism for receiving an analog bioelectrical signal;

(b) amplification means for amplifying said analog bioelectrical signal received by said receptor means and associated therewith;

(c) analog to digital converter means for converting said analog bioelectrical signal to digital signals representing corresponding electrical frequencies, said converter means receiving said amplified analog bioelectrical signal from said amplification means and associated therewith;

(d) computing means for integrating amplitude of one of said digital signals over a predetermined duration and dividing a resulting value by voltage to determine change in voltage with respect to time duration, and thereby determining electrical frequencies emitted by the organism, said computing means then converting said resulting value divided by voltage to a format which can be plotted over time while avoiding distortions or delay which occur with power spectral and bandpass analysis; and

(e) display means for displaying said resulting value divided by voltage in said format for viewing of said corresponding electrical frequencies.

8. An improved apparatus as claimed in claim 7, further comprising a recording means for recording said resulting value divided by voltage over time for subsequent review.