JP2819401B2 - EEG and ECG recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for an electroencephalogram and an electrocardiogram, and more particularly to a device for simultaneously displaying an electroencephalogram and an electrocardiogram waveform on the screen of a personal computer so that the functions of the brain and the heart can be simultaneously grasped. The present invention relates to an electroencephalogram recording apparatus which makes it possible to easily and intuitively and visually understand an electroencephalogram by creating an electroencephalogram comprising each electrode part and recording the electroencephalogram in the form of a two-dimensional image.

[0002]

2. Description of the Related Art Conventionally, a brain wave is generally recorded by inducing a change in electrical activity of the brain with respect to time from an electrode on a scalp and recording a fluctuating potential difference on a vertical axis, time on a horizontal axis, and approximating a sine wave. It is displayed as a curved waveform curve. As an actual recording method, the electroencephalogram has a very small electric potential in the unit of microvolts, so it is greatly amplified by an electroencephalograph, and the amplified electroencephalogram is drawn in a wavy form on the flowing paper by the vertical movement of the pen tip. I have. This waveform has a height (amplitude μV) and width (duration,
Period (milliseconds), frequency (cycle)
Is 1 / cycle.

In order to read an electroencephalogram from the waveform recorded as described above, it is generally assumed that the electroencephalogram is drawn at a width of 3 cm for one second. The frequency is determined by measuring the ratio within 3 cm using a scale or the like, and the amplitude is determined by measuring the length on a scale and converting it to a voltage.

On the other hand, the function of the heart is recorded by measuring an electrocardiogram using an electrocardiograph, and judgment is made by analyzing the obtained result.

It is widely known that an electrocardiogram is a useful record for grasping the function of the heart. The electrocardiogram is obtained by electrically measuring the excitement of the heart and how to excite the heart, and is represented by waveforms called P waves, QRS complex, and T waves. This is followed by mechanical atrial and ventricular excitement, ie, contraction and dilation. Therefore, the waveform displayed on the electrocardiogram is an electrical view of the heart excitement process required for causing the heart to move and the process of reducing the excitement.

Conventionally, an electrocardiogram is a long recording paper (a graph with a scale, the minimum unit of the scale is 1 mm in length, a small square of 1 mm in height, and a small square between thick lines). (Five squares are squared in), and is usually drawn at a width of 2.5 cm per second. The width (millisecond) and height (amplitude mV) of each wave of P, QRS, ST, and T are measured for each beat of the drawn waveform, and the heart rate, rhythm, axial deviation, hypertrophy, myocardial disorder, We understand infarction.

[0007]

However, in order to read an electroencephalogram, every page of the recorded electroencephalogram must be read, but it takes time to read all of a large number of waveforms. Although the reading of the portion representing the feature is performed to grasp the entirety, accurate reading requires skill and there is a drawback that it is difficult to make a quantitative determination because individual differences occur.

[0008] On the other hand, recently, an addition analysis by a computer of an evoked potential of an electroencephalogram has been performed, and a color graphic CRT
There are some methods of displaying potentials by pattern or color, but the display is not quantitative, the discrimination is inaccurate, and the method is indistinct.

As a method for solving such a drawback, the present applicant has already disclosed in Japanese Patent Application Laid-Open No. 61-164542 a method in which brain waves are converted into δ, θ, α ₁ , α ₂ , β ₁ and β ₂ . We proposed an electroencephalogram recording device that can be measured quantitatively and intuitively by displaying the potential on the vertical axis and the horizontal axis on the line graph of each electrode site for each frequency band. This device is
An electroencephalograph that uses an electroencephalograph, converts an analog signal of the electroencephalogram measured by the electroencephalograph into a digital signal by an interface device, calculates the digital signal by a personal computer, and graph-displays the image on a screen. is there.

However, in this brain wave recording device,
The use of a conventional electroencephalograph makes the device large and complicated, and the analog signal of the electroencephalogram signal obtained by the electroencephalograph is amplified and corrected so that the electroencephalogram is recorded in a wave shape on paper. Since the analog signal of the brain wave obtained by the EEG is different, in order to display a clear graph of the brain wave on the screen of the personal computer, it is necessary to use an interface device that is compatible with the brain wave signal to be captured, There was a disadvantage that the interface device had to be changed so as to be compatible with this model.

Further, the present applicant has disclosed the above-mentioned JP-A-61-61.
An electroencephalogram recording apparatus using a conventional electroencephalograph disclosed in Japanese Patent No. 164542 is improved, and an electroencephalogram signal induced from an electrode mounted on a scalp has already been disclosed in Japanese Patent Application Laid-Open Nos. 62-189051 and 63-89141. Was directly introduced into a personal computer via an interface device without using a conventional electroencephalograph, and an electroencephalogram recording device for displaying on a screen as a line graph was proposed.

[0012] However, this electroencephalogram recording apparatus has the advantage of not using a conventional electroencephalograph. However, if the other electrophysiological functions cannot be simultaneously grasped only by recording the electroencephalogram and the measurement conditions are poor, There was a disadvantage that noise from the outside was mixed into the brain wave signal.

On the other hand, recently, it is required to grasp not only the function of the brain by the electroencephalogram but also other biological functions at the same time. For example, by simultaneously grasping the functions of the brain and the heart, it is possible to simultaneously understand the aging phenomenon of the brain and the status of the activity of the heart, especially in elderly people, which is useful for treatment and the process that leads to the cessation of the function of the brain and heart. Can be grasped at the same time.

[0014] However, conventionally, the electroencephalogram and the electrocardiogram are recorded separately, and the electrocardiogram must read each page of the electrocardiogram recorded by the electrocardiograph. For this reason, the part that represents the overall characteristics of the waveform is read and the whole is grasped. However, accurate reading requires skill, and it is difficult to make a quantitative determination because individual differences occur. was there.

The present invention has been completed as a result of conducting research in view of such conventional problems, and is a recording device which does not use a large and complicated electroencephalograph or electrocardiograph as in the prior art. Is attached to each of the measurement sites on the examiner's scalp and chest, and amplifies the electroencephalogram signal and electrocardiogram signal obtained from the electrodes.At this time, the noise contained in the electroencephalogram signal and electrocardiogram signal is removed to achieve high purity. The brain wave signal and the electrocardiogram signal are simultaneously selected by the switch, and the brain wave signal and the electrocardiogram signal are simultaneously selected by the switch, and further analyzed by the digital signal processor. The brain wave and the electrocardiogram waveform are simultaneously displayed clearly on the CRT of the personal computer. It is an object of the present invention to provide a recording device capable of simultaneously capturing the information.

Further, according to the present invention, an electroencephalogram signal is selected from the electroencephalogram signal and the electroencephalogram signal amplified and corrected as described above, and further analyzed by a digital signal processor, and the electroencephalogram is clearly transmitted to the CRT of a personal computer by δ, θ. , Α
_{1, α 2,} β _1, the vertical axis potential for each frequency band of the beta _2,
A compact device that can display the electroencephalogram signal obtained from the electrode directly on the screen by displaying the horizontal axis on a line graph of each electrode part, to measure the electroencephalogram quantitatively, intuitively and accurately It is an object of the present invention to provide a recording apparatus capable of performing the following.

[0017]

That is, the present invention provides an electroencephalogram electrode which is attached to each induction site of the scalp and induces an electroencephalogram signal analog signal, and an electroencephalogram signal captured by the electroencephalogram electrode. A preamplifier for amplifying, an electroencephalogram system circuit (A) having an electroencephalogram signal correcting means for removing distortion of an electroencephalogram signal amplified by the preamplifier, and an analog signal of an electrocardiographic signal attached to each lead site of the chest. An electrocardiographic electrode to be induced, a preamplifier for amplifying an analog signal of the electrocardiographic signal captured by the electrocardiographic electrode, and an electrocardiographic signal correction for removing distortion of the electrocardiographic signal amplified by the preamplifier An electrocardiographic circuit (B) having means, an analog switch for connecting the electroencephalographic circuit (A) and the electrocardiographic circuit (B), and an analog signal input from the analog switch as a digital signal. Conversion to That the A / D converter and, the A / D
A digital signal processor that captures digital signals from the converter, controls the interface and sends data to the personal computer, captures digital signal data from the digital signal processor, displays brain waves and ECG waveforms simultaneously, and captures brain waves A personal computer that performs an operation on the measurement data described above and displays an electroencephalogram on the vertical axis as a potential and the horizontal axis on a line graph of each electrode portion.

In the present invention, the electroencephalogram signal correcting means preferably comprises a hum filter and a buffer amplifier, and the electrocardiographic signal correcting means preferably comprises a hum filter and a buffer amplifier.

Preferably, the A / D converter and the digital signal processor are connected via a photocoupler.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The apparatus for recording an electroencephalogram and an electrocardiogram according to the present invention amplifies the electroencephalogram signal of 12 or 16 channels and the electrocardiogram signal of at least one channel of the electroencephalogram input from the electrode, and is included in the electroencephalogram signal and the electrocardiogram signal. It removes noise and corrects it to a high-purity signal, sends it to a personal computer via a digital signal processor, analyzes it, and automatically records EEG and ECG waveforms or EEG recordings based on the results. .

FIG. 1 is a block diagram showing an example of an electroencephalogram and electrocardiogram recording apparatus according to the present invention. This apparatus comprises an electroencephalogram circuit (A) having an electroencephalogram electrode, a preamplifier, and an electroencephalogram signal correction means, and an electrocardiogram circuit (B) having an electrocardiogram electrode, a preamplifier, and an electrocardiogram signal correction means. And an analog switch for connecting the electroencephalogram circuit (A) and the electrocardiogram circuit (B), an A / D converter, a digital signal processor (DSP), an interface, a computer body, a CRT, a printer, and photostimulation. It consists of equipment and data analysis software.

The brain wave circuit (A) of FIG. 1 will be described. An electroencephalogram electrode is attached to a measurement site on the scalp to capture an electroencephalogram signal. In the measurement of EEG, the electrode for EEG is the international formula 1
Mounted by unipolar induction with 12 or 16 channel inputs compatible with 0-20 method. Further, as the electrode, a commercially available electrode for brain wave measurement can be used.

According to the present invention, an electroencephalogram is directly measured using the electroencephalogram electrode without using a conventional electroencephalograph. In the electroencephalogram measurement, the electrode is attached by a monopolar induction method using an international M10-20 method. 12 sites FP1 ・ F on the scalp
P2 ・ F7 ・ F8 ・ C3 ・ C4 ・ T5 ・ T6 ・ O1 ・ O
2. Attach electrodes to FZ / PZ and measure.

Further, a contact resistance measuring device for measuring a contact resistance (impedance) between the electrode and the scalp, two buffer amplifiers (buffer amplifiers) for removing a distortion of an electroencephalogram signal, and a potential between two points on the scalp are recorded. For this purpose, an electrode selector for selecting two lead lines for each channel, a calibration device capable of generating various calibration voltages based on 50 μV as brain wave signals, and the like are provided.

The contact resistance measuring device and the first buffer amplifier (buffer amplifier) represent a probe unit. The analog signal of the electroencephalogram signal captured by the electroencephalogram electrode is amplified by a preamplifier.

In the present invention, since the resistance value of the scalp to which the electrode is attached is high, an electroencephalogram signal of an extremely low potential of several μV to several tens μV is taken in from the electrode, but a preamplifier adjusts the electroencephalogram signal. To amplify.

An example of the specifications of the preamplifier is as follows: impedance: 5 mega-ohm FET input: front-back amplification: 20 times input noise: 0.67 μV.

In the present invention, the electroencephalogram signal correcting means is a circuit for removing distortion of the electroencephalogram signal amplified by the preamplifier, and includes, for example, a hum filter (differential amplifier) and a buffer amplifier (buffer amplifier).

The hum filter is a commercial AC noise (hum)
Eliminate in-phase noise. Furthermore, noise and distortion other than the brain wave signal are removed by a buffer amplifier (buffer amplifier). In addition, it is also possible to provide an optical stimulus device, apply an optical stimulus to the examiner when measuring the electroencephalogram, and analyze the electroencephalogram signal at that time.

Next, the electrocardiographic circuit (B) will be described. An electrocardiographic circuit (B) is mounted on each lead site of the chest to guide an analog signal of an electrocardiographic signal, and a preamplifier for amplifying the analog signal of the electrocardiographic signal captured by the electrode. And an electrocardiogram signal correcting means for removing distortion of the electrocardiogram signal amplified by the preamplifier.

Electrocardiographic electrodes are attached by standard 12 leads with 6 limb leads and 6 chest leads. In addition, a commercially available electrode for electrocardiogram can be used, and for example, an electrode for electrocardiogram measurement can be used. Electrocardiographic electrodes are attached with one channel input.

The analog signal of the electrocardiographic signal captured by the electrocardiographic electrode is amplified by a preamplifier. The preamplifier adjusts and amplifies the electrocardiographic signal. As an example of the specification of the preamplifier, the same one as that used for the measurement of the electroencephalogram can be used.

In the present invention, the ECG signal correcting means is a circuit for removing distortion of the ECG signal amplified by the preamplifier, and includes, for example, a hum filter (differential amplifier) and a buffer amplifier (buffer amplifier).

The hum filter is a commercial AC noise (hum)
Eliminate in-phase noise. Furthermore, noise and distortion other than the electrocardiogram signal are removed by a buffer amplifier (buffer amplifier). These can use the same thing as the measurement of an electroencephalogram.

The electroencephalogram circuit (A) and the electrocardiogram circuit (B) are connected to an analog switch. The analog switch has 12 channels of EEG signals and one of electrocardiogram signals.
This is a device that switches an input of a channel to an input of each channel and takes in an analog signal from an electrode. The analog switch can be set to simultaneously capture the analog signals of the electroencephalogram signal and the electrocardiographic signal, or to capture either the analog signal of the electroencephalogram signal or the electroencephalographic signal.

The programmable amplifier (PGA) corrects for variations in analog signals between the electroencephalogram signal and the electrocardiogram signal. Next, the analog signal of the electroencephalogram signal and the electroencephalogram signal input from the analog switch is converted into a digital signal by the A / D converter.

The A / D converter is connected to a digital signal processor (DSP) via a photo coupler. The digital signal processor takes in digital signals from the A / D converter, controls the interface, and sends data to the personal computer.

The interface is a connector for connecting a personal computer. In the present invention, the personal computer is connected to the digital signal processor, can calculate the measurement data sent from the digital signal processor, can simultaneously display the electroencephalogram and the electroencephalogram waveform, and can obtain the measurement data of the captured electroencephalogram. Is performed, and the brain wave is displayed on the vertical axis as the potential and the horizontal axis as the line graph of each electrode portion.

The personal computer includes a computer main body, a color display, a keyboard, a 10 MB fixed disk device, a printer, and the like. The personal computer used in the present invention is not particularly limited, and a commercially available personal computer can be used. A specific example thereof is described below.
OD, memory 256 KB to 384 KB.

Next, the specifications of the personal computer used in the present invention are as follows. 〇Computer main unit Memory capacity: ROM 8 Kbytes: RAM 384 Kbytes Color CRT output: 640 × 480 dots Palette function Simultaneous 8 colors display Printer output: 24 × 24 dots 120 CPS Calendar clock: Built-in power supply: AC100V ± 10% Power consumption: 0.9KVA Weight: 23Kg Size: 480 (W) x 445 (D) x 165 (H) mm

〇Color display unit CRT: 12 inches Display color: 83 colors including three primary colors, 8 colors, and intermediate colors Screen composition: Graphic screen x 9 + character screen Power supply: AC100V ± 10% Power consumption: 90VA or less Weight: 12Kg Size: 320 (H) x 415 (D) x 347 (W) with tilt stand Number of display characters: 80 characters x 24 lines x 9 screens

〇Keyboard key layout: Standard JIS (with numeric keypad) Output data: JIS 8-bit code (parallel) Weight: 2.3 kg

$ 10 MB fixed disk device Storage capacity: 10 megabytes Data capacity: 1000 people

〇Printer Printing speed: 80 characters / second Printing method: Dot matrix impact bidirectional printing Number of characters: 80 characters / line, 66 lines / page Power supply: AC100V ± 10% Power consumption: 120VA Weight: 16Kg Large Sa: 570 (W) x 455 (D) x 175 (H)

Next, a method of recording an electroencephalogram and an electrocardiogram waveform using the electroencephalogram and electrocardiogram recording apparatus of the present invention will be described. First, a 12-channel electroencephalogram signal input from an electroencephalogram electrode attached to each lead site of the scalp is taken into a personal computer via an electroencephalogram system (A) such as a preamplifier and an electroencephalogram signal correction means shown in FIG. . The measurement conditions were fixed for 5 seconds per acquisition (4.88 ms
ec × 1024), the number of times of capturing is set to 1 to 100 times.

Next, the number of acquisitions is set, and the measurement data is stored in real time from the electroencephalogram electrode to the main memory of the personal computer C-7000D via the preamplifier and the electroencephalogram system circuit (A). Number of channels: 12 channels Sampling clock: 4.8 ms Sampling number: 1024 points / channel

On the other hand, an electrocardiographic circuit (B) such as a preamplifier and an electrocardiogram signal correcting means shown in FIG. 1 is used to convert a one-channel electrocardiographic signal input from an electrocardiographic electrode attached to each lead site of the chest. Via a personal computer. The measurement conditions were fixed for 5 seconds per acquisition (4.88 ms
× 1024), the number of times of capturing is set to 1 to 6 times.

Next, the number of captures is set, and the personal computer C-7 is connected to the electrodes via the interface device.
The measurement data is stored in the 000D main memory in real time. Number of channels: 13 channels Sampling clock: 4.8 ms Sampling number: 1024 points / channel

In this case, the analog switch is set so that both the electroencephalogram signal and the electroencephalogram signal can be measured. 1
The brain waves of two channels and the electrocardiogram waveform of one channel are displayed on the screen in real time.

On the other hand, the time series data of the brain wave stored in the main memory is converted into a complex Fourier series by the fast Fourier transform (FFT), and the power spectrum of the brain wave is calculated. FFT calculation accuracy: 32 bits Frequency resolution: 0.5 Hz Frequency band: 0 to 80 Hz

The power spectrum obtained as a result of the operation is stored on a fixed disk. 5 times the sampled data
The operation of calculating the power spectrum every second and storing the result is repeated a set number of times.

When the power spectrum for the set number of times is stored, the average power spectrum equally divided by the number of times is set to 1
Graphs are displayed simultaneously on one screen for two channels. The power spectrum is written into the measured value master file of the fixed disk for each channel and each frequency band, and the measured value master file is read.
0 μV, the horizontal axis is an electroencephalogram graph of a line graph of an electroencephalogram of each electrode site 1 to 12 channels. S graph I, II
Create

Frequency band classification δ wave 2.0 to 3.8 Hz θ wave 4.0 to 7.8 Hz α ₁ wave 8.0 to 9.8 Hz α ₂ wave 10.0 to 12.8 Hz β ₁ wave 13.0 １９19.8 Hz β ₂ wave 20.0 to 29.8 Hz

FIG. S graphs I and II are No. By reading the measurement value master file and displaying it in color on the CRT screen,
Perform the process of printing a hard copy on the printer.

In this way, the brain wave can be recorded on the brain wave graph in which the vertical axis represents the potential and the horizontal axis represents the line graph of each electrode portion. In addition, it is also possible to provide an optical stimulus device, apply an optical stimulus to the examiner when measuring the electroencephalogram, and analyze the electroencephalogram signal at that time.

Further, in the present invention, a respiratory waveform can be simultaneously displayed in addition to an electroencephalogram and an electrocardiogram waveform. Specifically, a method of capturing the movement of the thorax from the movement of the electrocardiographic electrode attached to the chest and displaying a respiratory waveform by thoracic respiration, or attaching a CO ₂ gas measurement sensor to the nostrils to enter and exit by respiration There is a method of displaying a change in the concentration of CO ₂ gas contained in breath as a respiratory waveform. This respiratory waveform can be displayed simultaneously with the brain wave and electrocardiogram waveform shown in FIG. 2 as a continuous waveform of peaks and valleys.

[0057]

Next, the present invention will be described more specifically with reference to examples.

Example 1 Recording was performed using the electroencephalogram and electrocardiogram recording apparatus shown in FIG. Using a commercially available electrode for an electroencephalograph, a contact resistance measuring device, a first buffer amplifier (buffer amplifier), a second buffer amplifier (buffer amplifier), an electrode selector, a calibration device, a preamplifier, and a hum filter are sequentially used. (A differential amplifier), an electroencephalogram circuit (A) connected to a buffer amplifier (buffer amplifier), and a calibrator, a preamplifier, and a hum filter (differential) sequentially using a commercially available electrocardiograph electrode. Amplifier), a buffer amplifier (buffer amplifier), an electrocardiographic circuit (B), an electroencephalogram circuit (A), an analog switch connecting the electrocardiographic circuit (B), and a programmable amplifier (P
GA), an A / D converter, a photocoupler, a digital signal processor (DSP), an interface, and a personal computer (Panafacom C-7000D, manufactured by Matsushita Electric Industrial Co., Ltd.) as shown in Table 1. EEG and ECG waveforms were recorded according to the processing procedure.

[0059]

[Table 1]

[Processing Procedure] Registration of subject Menu No. from menu screen. When 1 is selected, the following items are displayed on the screen. The subject's number, name, birthday, FM (gender), and LP are displayed, and these are entered and registered. The data capacity is 500 persons, and four measurement data can be recorded for one examiner.

[0061] 2. Subject data display Menu No. from the menu screen When 2 is selected, the subject's number, name, age, date, time, 1, 2, 3, 4,
NOTE, a frequency band name, and a frequency band are displayed.

3. Original waveform display Calculation start Menu No. from menu screen Select 3. Data is automatically collected from the electrodes, the number and name of the subject are displayed, and the count number and the original waveform (first count: 5 seconds) of each part (12 channels + 1 channel) are displayed in real time.

FIG. 2 shows an example of a graph displaying the original waveform. In FIG. 2, FP1, FP2, F7, F8, C
3, C4, T5, T6, O1, O2, FZ, and PZ indicate brain waves, and H1 indicates an electrocardiogram waveform. The number of acquisitions is collected by designating a count number.

Next, the start of calculation and the display during calculation are performed. The calculation is repeatedly performed such that the signals of all the channels are taken in for 5 seconds, then the power spectrum is calculated and added to the previously obtained power spectrum. One count for 5 seconds can be calculated up to 100 counts, and any count can be specified. The capture start time is automatically displayed, and the capture end time is automatically displayed.

4. Display of spectrum graph Menu No. from menu screen When 4 is selected, a power spectrum graph screen is displayed. The result of the power spectrum of 12 channels of the brain wave is displayed. The vertical axis represents the electric potential, and the horizontal axis represents the frequency of 0 to 75 Hz and the scale of 5 Hz. The calculation and count are displayed.

5.6 Simultaneous Display of 6 Frequency Bands When 5 is selected, the screen of the subject's 6 frequency bands is displayed at the same time. The average potential of each channel obtained by the above calculation is displayed on the vertical axis as the potential, and the horizontal axis is displayed as a line graph of each electrode portion. A potential distribution chart is displayed for each frequency. In this case, the magnitude of the potential of the power spectrum is divided into six levels, and each potential is compared and displayed by pattern, and each frequency band δ, θ, α ₁ , α ₂ , β ₁ , β ₂ is compared and displayed by color.

Delta band (blue): frequency 2.0 to 3.8 Hz Theta band (purple): frequency 4.0 to 7.8 Hz Alpha band (red): frequency 8.0 to 12.8 Hz beta band (green) : Frequency 13.0-29.8 Hz

{S. When F.8 is selected from the S graph I menu screen, display / non-display of the normal person graph can be switched. Specify Y if you want to display a normal person graph, N if not. In the normal person graph, a graph according to age is automatically displayed according to the age of the subject. The display of a normal person graph is represented by a minimum value to a maximum value, a white vertical line, an average value, and a white thick line.

The average potential of each channel obtained by the calculation is displayed on a vertical axis as a potential, and the horizontal axis on a line graph of each electrode portion. A normal person graph can be input and compared with graphs of each age in their 20s to 60s. (Age graph according to examiner the age, the age graph is displayed) frequency band example _{δ, θ, α 1, α} 2, β 1, 6 -frequency band of beta ₂ are displayed simultaneously.

The measurement results for four times of the first red, the second yellow, the third green, and the fourth blue can be displayed, and the comparison can be performed. Also, S.I. A normal person graph is displayed on the S graph I, and the data of the subject can be compared and examined. FIG. 3-
FIG. 8 shows a diagram comparing the data of one measurement in the six frequency bands of δ, θ, α ₁ , α ₂ , β ₁ , and β ₂ with the normal person graph.

6. Arbitrary frequency band display From the menu screen, select menu No. When 6 is selected, a screen of an arbitrary frequency band among the 6 frequency bands of the subject is displayed. The average potential of each channel is indicated by a vertical line, and the horizontal axis is indicated by a line graph of each electrode portion.

{S. When F.8 is selected from the S graph II menu screen, display / non-display of the normal person graph can be switched. Specify Y if you want to display a normal person graph, N if not. S. From S graph I, any one of δ, θ, α ₁ , α ₂ , β ₁ , β ₂ can be selected and displayed.

S. From the S graph II, a normal person graph is displayed, and each of the six frequency bands of the subject can be individually compared. FIG. From S graph I, δ wave band (1
Measurement data). The figure displayed on S graph II is shown. FIG. From S graph II, a normal person graph is displayed, and the δ wave band of the subject (one measurement datum)
FIG.

7. List of potentials by frequency band Menu No. from the menu screen When 7 is selected, a screen of measurement data values of 12 channels is displayed for each frequency band. A list of potentials of the subject four times is displayed. Table 2 shows a list of potentials of one test subject.

[0075]

[Table 2]

8. S. From the S Graph III menu screen, select Menu No. When 8 is selected, a screen is displayed in which the vertical axis represents potential and the horizontal axis represents time. The function can be observed by measuring the time course of the bioelectric potential.

9. Print out the subject list from the menu screen. Select 9. Pressing the return key prints a list of subjects.

10. Normal person graph list Menu No. from the menu screen. When 10 is selected, the screen of a normal person is displayed. The frequency is specified, and the average value, maximum value, and minimum value are registered for every 12 channels.

11. Deletion of subject registration Menu No. from menu screen When 11 is selected, a screen is displayed. No. To register, correct, or delete the subject's name, date of birth, and gender.

As described above, the recording apparatus for the electroencephalogram and the electrocardiogram according to the present invention has the following features. In the original waveform display, the original waveform of the brain wave (12 channels) and the original waveform of the electrocardiogram waveform (1 channel) can be displayed at the same time. By continuously observing this screen, the function of the brain and the function of the heart can be obtained. Can be captured at the same time. Therefore, it is possible to carry out treatment while grasping the functions of the brain and the heart and grasping the relationship between the two, and to grasp the state of the cessation of the functions of the brain and the heart at the end of life.

[0081]

As described above, the recording apparatus of the electroencephalogram and the electroencephalogram according to the present invention has the following excellent effects. (1) An electrode is attached to each measurement site of the examiner's scalp and chest without using a large and complicated electroencephalograph or electrocardiograph as in the past, and an electroencephalogram signal and an electrocardiogram signal obtained from the electrode are amplified. At this time, the noise contained in the electroencephalogram signal and the electrocardiogram signal was removed and corrected to a high-purity signal, the electroencephalogram signal and the electrocardiogram signal were simultaneously selected by a switch, and further analyzed by a digital signal processor. The brain wave and electrocardiogram waveform are simultaneously displayed clearly on the CRT of the computer, and the function of the brain and the heart can be simultaneously grasped. The function of the brain and the heart can be grasped and the treatment can be performed while grasping the relationship between the two. At the same time, at the end of life, it is possible to grasp the state of cessation of brain function and heart function.

[0082] (2) The present invention is amplified, select the EEG signal from EEG signals and ECG signals were modified further analyzed by a digital signal processor, a clearly EEG CRT of the personal computer [delta], theta, alpha ₁ , Α ₂ , β
_1, the vertical axis potential for each frequency band of the beta _2, by the horizontal axis displays the line graph of each electrode site in a compact device that can be directly on the screen displays the EEG signals obtained from the electrodes It can measure brain waves quantitatively, intuitively and accurately.

(3) Since the recording of the electroencephalogram is displayed in the form of a line graph, the electroencephalogram can be measured accurately and quantitatively, and there is no measurement error caused by the conventional measurer.

(4) A brain wave of a normal person is measured, and a line graph of a normal person's brain wave according to a potential is prepared for each waveform, and a clinical electroencephalogram test in a psychiatric area is performed based on the graph. By comparing how much the electroencephalogram deviates from the electroencephalogram pattern of a normal person, it can be applied not only to treatment of a pathological person, but also to examination of the functioning of the brain function of ordinary people and other areas.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of an electroencephalogram and electrocardiogram recording apparatus of the present invention.

FIG. 2 is a diagram showing an example of a graph displaying original brain waves and electrocardiographic waveforms.

FIG. 3 is a diagram comparing one measurement data of a δ wave band of a subject with a graph of a normal person.

FIG. 4 is a diagram in which one measurement data of a θ wave band of a subject is compared with a graph of a normal person.

FIG. 5 is a diagram in which one measurement data of the α ₁ wave band of the subject is compared with a graph of a normal person.

[6] The one measurement data of a subject of alpha ₂ wave band diagrams compared to normal individuals graph.

FIG. 7 is a diagram comparing one measurement data of the β ₁ wave band of the subject with a graph of a normal person.

FIG. 8 is a diagram in which one measurement data of the β ₂ wave band of the subject is compared with a normal person graph.

FIG. According to S graph I, the δ wave band (one measurement dart) was set to S.D. It is the figure displayed on S graph II.

FIG. FIG. 9 is a diagram showing a graph of a normal person from S graph II and comparing the δ-wave band (one measurement dart) of the subject.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61B 5/0476 A61B 5/044

Claims (4)

(57) [Claims] 1. An electroencephalogram electrode attached to each induction site of the scalp for inducing an analog signal of an electroencephalogram signal, a preamplifier for amplifying an analog signal of an electroencephalogram signal captured by the electroencephalogram electrode, and the preamplifier. EEG circuit (A) having EEG signal correcting means for removing distortion of EEG signal amplified by amplifier
An electrocardiographic electrode mounted on each lead site of the chest for inducing an analog signal of an electrocardiographic signal; a preamplifier for amplifying an analog signal of the electrocardiographic signal captured by the electrocardiographic electrode; An electrocardiographic circuit (B) having an electrocardiographic signal correcting means for removing distortion of the electrocardiographic signal amplified by the preamplifier, and further connecting the electroencephalographic circuit (A) and the electrocardiographic circuit (B). Switch, an A / D converter that converts an analog signal input from the analog switch into a digital signal, a digital signal that takes in the digital signal from the A / D converter, controls an interface, and sends data to a personal computer. When the signal processor and the digital signal data from the digital signal processor are taken in and the brain waves and electrocardiogram waveforms are displayed simultaneously To perform a calculation of measured data of incorporated electroencephalogram, EEG vertical axis potential, the horizontal axis EEG and ECG recording apparatus characterized by comprising a personal computer to be displayed on a line graph of the electrode sites. 2. The apparatus according to claim 1, wherein said electroencephalogram signal correction means comprises a hum filter and a buffer amplifier. 3. The apparatus according to claim 1, wherein said electrocardiogram signal correcting means comprises a hum filter and a buffer amplifier. 4. The electroencephalogram and electrocardiogram recording apparatus according to claim 1, wherein the A / D converter and the digital signal processor are connected via a photocoupler.