JP3154384U - Mental state change device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device that allows an experienced person to visually confirm the effect of a degree of relaxation and excitement by displaying numerical values of fluctuations thereof. SOLUTION: A biological signal detection means for detecting a biological signal by contacting an electrode with a forehead of a user, a transmission means for transmitting a biological signal detected by the biological signal detection means, and a transmission means transmitted from the transmission means Receiving means for receiving a biological signal; converting means for obtaining an electroencephalogram power spectrum by performing FFT processing on the biological signal detected by the biological signal detecting means; and power in a predetermined frequency band from the electroencephalogram power spectrum processed by the converting means. Presenting to the user, extraction means for extracting the calculation means, calculation means for calculating the total amount of the extracted electroencephalogram power values, analysis means for digitizing as an index based on the total amount of the extracted electroencephalogram power values, A mental state changing device comprising storage means for storing audiovisual content to be stored and control means for controlling each means. [Selection] Figure 1

Description

  This invention diagnoses a user's mental state, and selects and provides an optimal combination of sound and video for the user, thereby enabling an effective mental state change device that can be in an effective relaxed or excited state. It is about.

  In recent years, people living in developed countries have enjoyed a prosperous society due to rapid advances in science and technology, but on the other hand, they have suffered mental life under various stresses from civilizations that they have created. . In other words, due to the complexity of social systems, diversification of values, divergence from the natural environment, diversification of human relationships, rapid changes in society, and growth in average life expectancy, the majority of people regardless of gender or age. People live with some kind of stress.

  People who are exposed to such stress gradually lose confidence in their mental health and are affected by mental illnesses such as psychosomatic disorders. Clearly, initial or prophylactic treatment is effective to avoid the development of stress-induced heart disease, and most effectively counseling by a doctor is desirable. However, because of the fact that the home doctor system is not widespread, and there is a strong misunderstanding and prejudice about psychiatry, and there is no habit of having a doctor feel free to consult about mental problems, so I am enthusiastic about exercise and hobbies. It is common to diverge or relax yourself.

  Various relaxation methods and devices have been disclosed, for example, to maintain and enhance motivation for self-management by reducing depression and improving psychosomatic conditions in response to the user's psychological state A health management support device, a health management system, a health management support method, and a health management program are disclosed (see Patent Document 1). In addition, as a relaxation device, a biological information detection unit that detects information related to the user's biological body, a relaxation state determination unit that determines a user's relaxation state based on information detected by the biological information detection unit, and a user At least one of the type, volume, and tempo of the music generated by the music generating means is adjusted according to the user's relaxed state determined by the music generating means for generating the music to be heard and the relaxed state determining means. What comprises a music adjustment means is disclosed (refer patent document 2).

  In addition, by diagnosing symptoms / conditions for each individual, relaxation therapy using optimal sound and video or optimal sound, video and odor according to each person's situation is disclosed (see Patent Document 3). Further, from the user, a biometric information extraction unit that extracts an index indicating the biological state, a storage unit that stores the extracted index, and a temporal transition of the stored index are analyzed. A relaxation unit comprising a determination unit that determines whether or not an improvement is made in a direction indicating relaxation, and a notification unit that notifies that the living body has shifted to a relaxed state if the determination result is affirmative A guidance device is disclosed (see Patent Document 4). In addition, a relax / refresh system is disclosed in which a user is quickly guided to a relaxed state and refreshed according to the user's degree of relaxation (see Patent Document 5).

JP 2004-355328 A JP 2004-344284 A JP-A-10-118185 JP-A-10-76012 Japanese Patent Laid-Open No. 06-000209

  Conventionally, relaxation methods and devices disclosed by diagnosing the user's personal symptoms and conditions, providing optimal sound and video according to each person's situation, and viewing it The present invention relates to a method and apparatus for relaxation. However, the degree of relaxation as an improvement effect is left to the sensory judgment of the experience person, and there is a problem that it is doubtful whether it is really relaxing. The present invention has been made to solve these problems. By displaying the fluctuation value (relaxation value or excitement value) of the degree of relaxation or the degree of excitement as a numerical value, the experience person can obtain the effect. An object is to provide an apparatus and method that can be verified.

  The god state change apparatus of the present invention includes a biological signal detection unit that detects a biological signal by contacting an electrode with a forehead of a user, a transmission unit that transmits a biological signal detected by the biological signal detection unit, and the transmission A receiving means for receiving a biological signal transmitted from the means; a converting means for obtaining an electroencephalogram power spectrum by performing an FFT process on the biological signal detected by the biological signal detecting means; and an electroencephalogram power spectrum processed by the converting means. Extraction means for extracting power in a predetermined frequency band; calculation means for calculating a total amount of the extracted electroencephalogram power values; and analysis means for quantifying as an index based on the total amount of the extracted electroencephalogram power values; A mental state changing device comprising: storage means for storing audiovisual content to be presented to a user; and control means for controlling each means.

  The present invention is a device that uses a computer (such as a personal computer) that is widely used in homes and individuals. The configuration of the device is a header-type biological signal detection means mounted on the head, and wireless reception of biological signals. A receiver having a USB terminal, audio-visual content provided by a medium such as a CD or a DVD, and an application program for controlling each device. In order to experience the mental state changing device according to the present invention, a headphone for listening to music, a monitor for viewing images and images, and a computer for operating an application program are required.

  The most characteristic feature of the present invention is that the biological signal detected from the forehead of the user is subjected to FFT processing to obtain an electroencephalogram power spectrum, and the power in a predetermined frequency band is extracted from the electroencephalogram power spectrum. In other words, the total amount of the electroencephalogram power values is calculated and converted into an index based on the total amount. As a result, the experience person has means for confirming the effect of the degree of relaxation and the degree of excitement numerically as the fluctuation value (relaxation value or excitement value). As a result, it has unique actions and effects that have not existed before.

  In the mental state changing device of the present invention, the biological signal detecting means is formed so as to be detachably attached to a user's head, and an electrode that detects an electroencephalogram in contact with a forehead is a hard electrode. It is a mental state changing device characterized by comprising a film electrode. The biological signal detection means is formed in a substantially U shape so that it can be easily worn on the user's head, and the open end is flexible so that the gap can be adjusted according to the size of the head. It is made of plastic. In addition, by attaching a stretchable belt to the open end, wearability to the head is improved. In order to improve the degree of freedom in use, a wireless transmitter is used to transmit the biological signal detected from the forehead to the personal computer.

  In the mental state changing device according to the present invention, the analyzing means performs an inquiry about matters relating to the body and mind to the user before viewing the audio-visual content, and corrects the index before viewing based on the inquiry result. It is equipped with the mental state variation apparatus characterized by the above-mentioned. In the present invention, in order to grasp the current mental state of the user more accurately, the user's physical information and the current mental state are interrogated against the numerical values calculated by detecting biological information before the experience. And the numerical value is corrected based on the result. Thereby, it is possible to calculate and display a numerical value close to the mental state of the user.

  The mental state changing device according to the present invention is characterized in that the analysis means compares and calculates an index before and after the user views the audiovisual content, and calculates a reduction value or an increase value for the index before viewing after viewing. It is a mental state change device. According to this, since the numerical value before the user's experience, the numerical value after the experience, and the fluctuation value (the reduced value or the increased value) with respect to the numerical value before the experience are displayed on the monitor, the user experiences The fluctuation value due to this can be visually confirmed as a numerical value.

  In the mental state changing device according to the present invention, the analyzing means continuously calculates an index before and after viewing the audiovisual content, and provides a degree of change of the index as a numerical value and / or an image. It is a characteristic mental state change device. According to this, since the user can observe the mental state continuously changing during the experience of the apparatus on the monitor, the mental state is consciously observed while observing the fluctuation value (reduction value or increase value). Can be varied.

  The mental state changing device of the present invention includes a target value storage means for preliminarily storing a reduction or increase target value for an index before viewing before the user views the audiovisual content, and an index calculated after viewing the audiovisual content. A mental value fluctuation device characterized by comprising: a result value storage means for storing a comparison value; a comparison means for comparing a target value stored in the target value storage means with a result value; and providing a comparison result by the comparison means It is.

  Although this device is a device that changes the mental state, the user can set a target value before the experience, and the user consciously changes the mental state to clear the target value. Can be made. Thereby, it can be used like a game, such as clearing the target value or competing for the magnitude of the fluctuation value among a plurality of people.

  In the mental state changing device according to the present invention, the audiovisual content is stored in music storage means for storing music information relating to a plurality of music, and the control means includes one of a plurality of stored music. It is a mental state changing device characterized by comprising selection means for selecting music. In this way, content related to music can be selected from, for example, underwater, forest, southern country, and sunset genres, and if one of each genre is selected, it can be selected from a large number of music recorded in the genre. , You can choose the music that seems most appropriate for the user.

In the mental state changing device according to the present invention, the audiovisual content is stored in video storage means for storing video information relating to a plurality of videos, and the control means stores one of the stored videos. It is a mental state change device characterized by comprising selection means for selecting an image. In this way, the content related to the video can be selected from, for example, the underwater, forest, southern country, and sunset genres, and if one of the genres is selected, the content related to the video can be selected from a large number of videos recorded in the genre. , You can select the video that seems most appropriate for the user. Also, the presence or absence of BGM (background music) can be selected.

  The mental state changing device of the present invention includes connection means connected to a network by wire or wirelessly, the data storage means for the audiovisual content exists on the network, and the audiovisual content data passes through the connection means. It is a mental state change device characterized by being received. Although the basic configuration of the present invention is a stand-alone, the audiovisual content stored on the network can be selected by connecting a personal computer or the like to the Internet or an intranet. As a result, the selection range of the audiovisual content can be easily expanded, so that convenience can be improved.

  In the mental state changing device according to the present invention, the control means includes a history database in which user identification information, inquiry results, combinations of selected audiovisual contents, and mental state fluctuation values are individually stored as history information. If there is input of identification information from the same user after that, the history database is searched to display a list of past histories of the same user, and the combination of audiovisual contents most suitable for the user It is a mental state variation device characterized by comprising means for recommending and presenting.

  The mental state changing device according to the present invention is expected to be used repeatedly by the user. Therefore, if the user's identification information is registered for the first time, the user's past history information can be viewed from the next time by entering the user's identification information, which is optimal for the user. It is possible to automatically select audiovisual content that seems to be.

  The mental state changing device of the present invention includes a biological signal detection step of detecting a biological signal by contacting an electrode with a forehead of a user, a transmission step of transmitting the biological signal detected in the biological signal detection step, and the transmission A reception step for receiving the biological signal transmitted in the step, a conversion step for obtaining an electroencephalogram power spectrum by performing an FFT process on the biological signal detected in the biological signal detection step, and a predetermined amount from the electroencephalogram power spectrum processed in the conversion step. An extraction step of extracting power in the frequency band, a calculation step of calculating the total amount of the extracted electroencephalogram power values, an analysis step of quantifying as an index based on the total amount of the extracted electroencephalogram power values, A mental state changing device comprising: a viewing process for allowing a user to view audiovisual content; and a control process for controlling each of the processes.

  The most characteristic feature of the mental state changing device according to the present invention is that a biological signal detected from the forehead of the user is subjected to FFT processing to obtain an electroencephalogram power spectrum, and power in a predetermined frequency band is extracted from the electroencephalogram power spectrum. Then, the total amount of the extracted electroencephalogram power values is calculated and digitized as an index based on the total amount. Thus, the experience person has a unique action / effect that has not been possible in the past, in which the effect of the degree of relaxation or excitement can be confirmed numerically as its fluctuation value (relaxation value or excitement value).

  In the mental state changing device of the present invention, in the analyzing step, before viewing the audio-visual content, the user is inquired about matters related to the body and mind, and the correction step is performed to correct the index before viewing based on the result of the inquiry. It is equipped with the mental state variation apparatus characterized by the above-mentioned. In the present invention, in order to grasp the current mental state of the user more accurately, the user's physical information and the current mental state are interrogated against the numerical values calculated by detecting biological information before the experience. And the numerical value is corrected based on the result. Thereby, it is possible to calculate and display a numerical value close to the mental state of the user.

  The mental state changing device of the present invention is characterized in that the analyzing step compares and calculates an index before and after the user views the audiovisual content, and calculates a reduction value or an increase value for the index before viewing after viewing. It is a mental state change device. According to this, since it is a method of displaying the numerical value before the user's experience, the numerical value after the experience, and the fluctuation value (reduction value or increase value) with respect to the numerical value before the experience on the monitor, the user should experience The fluctuation value due to can be visually confirmed as a numerical value.

  In the mental state changing device according to the present invention, the analyzing step continuously calculates an index before and after viewing the audiovisual content, and provides a degree of change of the index as a numerical value and / or an image. It is a characteristic mental state change device. According to this, since the user can observe the mental state that continuously changes during the experience on the monitor, the mental state can be changed consciously while watching the fluctuation value (reduction value or increase value). Can do.

  The mental state changing device according to the present invention includes a target value storing step of storing a reduction or increase target value with respect to an index before viewing before a user views the audiovisual content, and an index calculated after viewing the audiovisual content. A mental value changing device, comprising: a result value storing step for storing the actual value; and a comparison step for comparing the target value stored in the target value storing step with the actual value, and providing a comparison result by the comparison step It is.

  Although this device is a device that changes the mental state, the user can set a target value before the experience, and the user consciously changes the mental state to clear the target value. Can be made. Thereby, it can be used like a game, such as clearing the target value or competing for the magnitude of the fluctuation value among a plurality of people.

  In the mental state changing apparatus of the present invention, in the control step, a selection step of selecting one music from a plurality of stored music and / or one image from a plurality of stored images. A mental state changing device characterized by comprising a selection step of selecting. In this way, the content related to the video can be selected from, for example, the underwater, forest, southern country, and sunset genres, and if one of the genres is selected, the content related to the video can be selected from a large number of videos recorded in the genre. , You can select the video that seems most appropriate for the user. In addition, the presence or absence of BGM (background music) can be selected.

  The mental state changing device of the present invention includes a connection step in which a wired or wireless connection is made to a network, the audiovisual content data storage means exists on the network, and the audiovisual content data passes through the connection step. It is a mental state change device characterized by being received. Although the basic configuration of the present invention is a stand-alone, the audiovisual content stored on the network can be selected by connecting a personal computer or the like to the Internet or an intranet. As a result, the selection range of the audiovisual content can be easily expanded, so that convenience can be improved.

  In the mental state changing device of the present invention, the control step includes a history database in which user identification information, an inquiry result, a combination of selected audiovisual contents, and a mental state change value are individually stored as history information. If there is input of identification information from the same user after that, the history database is searched to display a list of past histories of the same user, and the combination of audiovisual contents most suitable for the user It is a mental state change device characterized by comprising a step of recommending and presenting.

  The mental state changing device according to the present invention is expected to be used repeatedly by the user. Therefore, if the user's identification information is registered for the first time, the user's past history information can be viewed from the next time by entering the user's identification information, which is optimal for the user. It is possible to automatically select audiovisual content that seems to be.

  According to the mental state changing device of the present invention, the experience person can confirm the effect of the degree of relaxation and the degree of excitement numerically as the fluctuation value (relaxation value or excitement value). In addition, a numerical value before the experience, a numerical value after the experience, a fluctuation value (a reduction value or an increase value) with respect to the numerical value before the experience, and a continuous change are displayed on the monitor, so that they can be visually confirmed as numerical values.

In addition, the present invention can set a target value before the experience, and the user can consciously change the mental state in order to clear the target value. Thereby, it can be used like a game, such as clearing the target value or competing for the magnitude of the fluctuation value among a plurality of people. The audiovisual content can be selected from, for example, underwater, forest, southern country, and sunset genres. If any of the genres is selected, the user can select from a large number of videos recorded in the genre. You can select the video that you think is most appropriate. Also, the presence or absence of BGM (background music) can be selected.
Furthermore, in the present invention, it is expected to be used repeatedly by the user, so if the user's identification information is registered for the first time, it will be used from the next time if the user's identification information is entered. The user's past history information can be viewed, and audiovisual content that seems to be optimal for the user can be automatically selected.

1 is an overall configuration diagram of a mental state changing device showing an embodiment of the present invention. It is an expansion | deployment perspective view of the biosignal detection means which shows one Embodiment of this invention. It is detail drawing of the film electrode of the biosignal detection means shown in FIG. It is a flowchart of the mental state variation apparatus which shows one Embodiment of this invention. It is a table | surface which shows the time transition of the time frequency plot of the mental state variation apparatus of this invention, and the time transition of an integrated power value. It is a table | surface which shows the time frequency revision of the electroencephalogram in the test subject of the mental state variation apparatus of this invention.

Hereinafter, the present invention will be described in detail based on the drawings. FIG. 1 is an overall configuration diagram of a mental state changing device showing an embodiment of the present invention. The devices surrounded by a solid line constitute the mental state changing device of the present invention, and the devices (headphone 6, monitor 7, computer 8, etc.) surrounded by a broken line use the mental state changing device. It is necessary equipment.

  The biological signal detecting means 1 detects biological signals (mainly brain waves) by bringing three electrodes into contact with the user's forehead. The biological signals detected from the three electrodes are wirelessly transmitted from the transmitter 2 incorporated in the biological signal detection means 1. The biological signal transmitted wirelessly is wirelessly received by the receiver 3 attached to the computer 8. The audiovisual content 4 stores video, images, and music, and is provided as an external storage device such as a CD or DVD that can be played back by the computer 8 or the like. An application system 5 that controls the mental state changing device is also provided as an external storage device such as a CD or a DVD.

  The application system 5 performs an FFT process on the biological signal detected by the biological signal detection means 1 to obtain an electroencephalogram power spectrum, and extracts power in a predetermined frequency band from the electroencephalogram power spectrum processed by the conversion function. An extraction function to calculate, a calculation function to calculate the total amount of the extracted electroencephalogram power values, an analysis function to digitize the NB value as an index based on the total amount of the extracted electroencephalogram power values, and A selection function for selecting audiovisual content to be presented; and a control function for controlling each of the functions.

  FIG. 2 is an exploded perspective view of the biological signal detecting means showing the embodiment of the present invention. 3A and 3B are detailed views of the film electrode, where FIG. 3A is a plan view and FIG. 3B is a cross-sectional view taken along line XX. In FIG. 2, the transmitter 2, the hard electrode 12, and the button battery 13 are attached to the outer cover 11. The substantially U-shaped outer cover 11 is formed of a flexible synthetic resin, and the opening degree of the gap between both ends on the open side changes according to the size of the user's head. . In addition, in order to ensure mounting on the head, the both end portions are provided with attachment holes to which detachable fastening bands (not shown) can be detachably attached as necessary. .

  Inside the center portion of the outer cover 11, an electrode portion, a transmitter 2, and a battery portion are provided. The electrode part is in contact with the user's forehead part and detects a user's biological signal, and includes an electrode cover 14, an electrode holder 15, and an electrode case 16. The outer surface of the electrode cover 14 is formed in a curved surface along the forehead of the user, and three electrodes are attached to the surface. Three hard electrodes 12 are inserted into the electrode cover 14, and film electrodes 17 that protect the three hard electrodes 12 are attached to the surface of the hard electrodes 12. The surface of the film electrode 17 is a jelly surface in order to improve the detection accuracy of the ecological signal from the user's forehead and to prevent it from falling off the forehead. The surface is attached with a detachable adhesive or pressure sensitive adhesive so that it can be replaced.

  The transmission unit wirelessly transmits the biological signal detected by the electrode to the computer side, and is incorporated in the electrode case 16. The battery part is for supplying electric power for driving the electrode part and the transmission part, and the button battery 13 is detachably attached thereto. The headphone 6 that listens to the audio in the audiovisual content 4 needs to be worn on the user's head separately from the biological signal detection means 1. However, the headphones 6 can be integrated with the biological signal detection means. It is also possible to be connectable to each other.

  Since a receiver for wirelessly receiving a biological signal is provided with a USB (Universal Serial Bus) terminal, it can be easily used by inserting it into a USB of a personal computer or the like to be used.

  The audiovisual content 4 stores video, images, and music, and uses one or a plurality of CDs (Compact Discs) or DVDs (Digital Versatile Discs), but can hold data such as semiconductor devices. Any type of medium can be used. These can be inserted into the computer 8 or an external playback device, or stored in the computer 8 (temporary storage or permanent storage) for viewing and listening.

  FIG. 4 is a flowchart of the mental state changing device showing an embodiment of the present invention. An explanation will be given according to each step. In S1, it is a step which starts a mental state variation apparatus. Turn on the power for the PC and start the application system.

  S2 is a step of inputting a user ID. For a new user, enter a user name or user ID. Since the user name or the user ID is displayed for the second and subsequent users, the corresponding user is selected.

  S3 is a user information input step. This step is necessary only for new users, and inputs the user's age, gender, height, weight, sleep time, and stress (feel quite, feel occasionally, feel normal, rarely feel, never feel, select more) .

  S4 is a user new information registration step. The input new user information is made into a database and stored in the application system.

S5 is a healing start step. The following interview is conducted to the user.
Question 1: Do you have a feeling of stress? (None, feel a little, feel normal, feel a little, feel often)
Question 2: How about the sleep interval? (Shallow, slightly shallow, normal, slightly sleepy, deep sleep)
Question 3: Do you have an appetite? (No, somewhat not normal, normal, somewhat strong, strong)
Question 4: Current weight: kg

  S6 is a stress level check step. The user's biological information is detected in the biological information detection process that the user wears on the forehead, the detected biological signal is transmitted to a personal computer, etc., and the transmitted biological signal is received by a receiver attached to the personal computer. The obtained biological signal is subjected to FFT processing to obtain an electroencephalogram power spectrum, power in a predetermined frequency band is extracted from the electroencephalogram power spectrum, a total amount of the extracted electroencephalogram power values is calculated, and the extracted electroencephalogram power value is calculated. The NB value is digitized as an index based on the total amount. This numerical value is corrected with a correction value based on the inquiry result in S5. The current stress level of the user is displayed as a numerical value.

  S7 is a stress level numerical display step before the experience. The result checked in S6 is displayed numerically on the monitor.

  S8 is an audiovisual content selection screen. Audiovisual content is composed of video and music, and video can be selected from underwater, forest, southern country, and sunset. In addition, music can be selected from either without BGM or with BGM.

  S9 is an experience step. The user can view the audiovisual content selected in S8 through a monitor and headphones.

  S10 is a numerical display step after the experience. On the screen, a numerical value before the experience, a numerical value after the experience, and a fluctuation value (a reduction value or an increase value) are displayed as numbers. In addition, a comment on the fluctuation value (for example, when the effect is small, the healing effect is slight. The effect is not seen so much. Let's move the body to relieve tension) is displayed.

  S11 is an end step. Click the Exit button to exit the application system.

"Example 1"
In order to scientifically and objectively evaluate the effects of the mental state change device according to the present invention (hereinafter referred to as this device), the cranial nerve activity and various biological signals of the subject when various tasks were performed were measured. As a result, when a task (stress task) for imagining calling a person who is far away is carried out, this device outputs a large signal. increased. In the subsequent task of viewing audio-visual content (relaxation task), the output signal of this apparatus decreased, and the total Hb value decreased in NIRS. As a result, it has been found that the output of this apparatus has a correlation with the output of NIRS.

(experimental method)
Prior to the experiment, the contents of the experiment were explained to all subjects. The measurement was carried out in a room where outside light entered and air conditioning was effective. In addition, subjects were asked to sit on a relaxing sofa during the experiment, and in order to prevent noise, the subjects and their eyes were not moved as much as possible during the measurement.

The tasks implemented this time are as follows: 1) Resting eyes closed task: Keeping eyes closed and doing nothing (3 minutes)
2) Stress problem: Imagine calling out a distant person out loud (2 minutes)
3) Relaxation task: Watch the audiovisual content provided (3 minutes)
After a 3-minute eye-opening resting task, experiments are performed in the order of a stress task and a relaxation task, and the output signals of this device and the biological signals output from the devices and electrodes described below are measured simultaneously in parallel. did. The following devices are installed at the same time as this device.

1) This apparatus 2) Electroencephalogram electrodes: 9 locations near the top of the head and 1 location in the frontal region. Electrode mounting positions are 10 near the top of the head, 1 in the earlobe, 3 in the forehead 3) Electrooculogram measurement electrodes ... one for each temple (excludes EEG data mixed with eye movement noise from the subsequent processing) (Measure electrooculogram for
4) Infrared spectroscopy probe: 8 probes are fixed to the frontal region and 6 cerebral blood flows are measured. 4) Electrocardiographic electrodes ... Electrodes for left and right upper arms and right ankles. ) Piezoelectric element for pulse wave measurement: Wearing it on the index finger

  Data were measured continuously throughout the tasks of resting eyes closed, stress and relaxation. In consideration of the burden on the subject, in principle, one measurement was limited to one in the morning or afternoon, and an experiment was performed for about 1 hour including 30 minutes of preparation time. In addition, stress tasks were set without drug use or physical invasion.

(Experimental result)
After informed consent, the results of an experiment conducted on five healthy male subjects (age 23 to 49 years) were as follows.

(Head mounting device)
Comparing the output of this apparatus during the stress task and the relaxation task, the power spectrum value during the stress task is large at most frequencies (see the upper part of FIG. 5). In order to compare this quantitatively, the power of all frequencies at each time was integrated to show how it changed with time (see the lower part of FIG. 5). Then, it turned out that the power integrated value which was high at the time of a stress task in 4 subjects out of 5 decreases during the relaxation task.

(Near Infrared Spectroscopy (NIRS))
NIRS is a technique that can measure multi-local changes in cerebral blood flow. NIRS is thought to be able to indirectly measure cranial nerve activity because it is believed that nerve activity is thriving when blood flow changes are large. In this experiment, Shimadzu NIRStation
OMM-3000 was used. In this device, near infrared light of three types of wavelengths (780 nm, 805 nm, 830 nm) is irradiated from the scalp into the brain, and a multi-alkali photomultiplier detector is built in. Scattered light from the brain was detected with the optical fiber. The relative change from the initial value of oxygenated hemoglobin (oxyHb), deoxygenated hemoglobin (deoxyHb), and total hemoglobin (totalHb) can be measured from the output of three types of wavelengths by a three-wavelength absorbance calculation method. It is possible to detect a change in blood flow accompanying cranial nerve activity in the brain. When this device was used to measure changes in cerebral blood flow in the frontal lobe of subjects during resting with eyes closed and when performing stress and relaxation tasks, total Hb values increased during stress tasks in all subjects, Was found to decrease. It was also found that the total HB value during the relaxation task was higher than when the eyes were resting.

(Pulse wave)
In previous studies, it was found that the period of the pulse wave changes between relaxation and stress. Therefore, it was investigated whether the same phenomenon was observed in this experiment. As a result of frequency analysis of fast wave Fourier transform (FFT) of pulse wave data detected by a pulse wave pickup sensor (piezoelectric element) attached to the fingertip, the spectral distribution of pulse waves during a closed eye resting task and a relaxing task are similar However, it was found that the frequency of the pulse wave with the maximum power in the stress task was higher than in other tasks.

(Electroencephalogram)
Data from the electroencephalogram measurement electrode Pz (occipital parietal region) is shown in FIG. Except for an example (see the upper part of Fig. 6) where the power was high in the high frequency region of 20 Hz or higher during the stress task, all other subjects showed similar spectrograms during the stress task and during the relaxation task. The power of the region width (8 to 13 Hz) was small (see the lower part of FIG. 6). In addition to the above five subjects, only one subject put the closed eye rest task between each task, and the mental arithmetic task was imposed as a stress task. Although it was observed, the stress task and the relaxation task were not as prominent as when the eyes were closed.

(Conclusion)
Through this experiment, it has been found that the output data of the mental state change device (hereinafter referred to as this device) is correlated with the NIRS data. In previous studies, it has been found that an increase in cerebral blood flow is observed in the frontal lobe during stress tasks such as mental arithmetic, so the output of the stress cleaner head-mounted device is similar to NIRS in terms of cerebral blood flow in the frontal lobe. It is suggested that it reflects. Also, NIRS experimental results revealed that the provided audiovisual content has the effect of reducing the increased cerebral blood flow. As a result, it became clear that the output of this device can be an index of cranial nerve activity, and that audiovisual content affects changes in cerebral blood flow in the frontal lobe.

"Example 2"
Using a mental state change device (hereinafter referred to as the present device), each biological signal in a state where a person is consciously excited and in a relaxed state was measured and compared. The biological signal was subjected to FFT processing by sampling 2 to 40 Hz, and the power value was digitized to 0 to 100. In the present invention, this is defined as an NB (Numerical of Biological Signal) value. As a result, when all the subjects are in the excited state, the NB value is a high value of 58 to 85 (average is 68.6), and in the relaxed state, it is a low value of 7 to 23 (average is 14.8), which is clearly significant. Differences were noted. From this experimental result, it was found that the NB value has a correlation with the human condition.

(experimental method)
1) The experiment was conducted in a quiet conference room with no people in consideration of the environment.
2) A hairband type electroencephalogram detection means consisting of an electrode, amplifier, wireless transmitter and battery is attached to the subject's forehead (forehead), and a biological signal is received by a USB I / F receiver with a personal computer. And frequency analysis (FFT) was performed. A device (personal computer) for displaying the spectrum image after FFT and recording data was used.
3) For the NB value, all the power values of 2 to 40 Hz in the data of the previous item 2) were integrated for the measurement time, the average was obtained, and this was expressed as 100 index.
4) Definition of human condition / Relaxed state: Look at the indicator light (red LED) with open eyes (30 seconds)
・ Excited state: Imagine calling out a distant person out loud (30 seconds)
・ Normal state: Reading texts with open eyes or talking to people 5) Protocol Relaxed state continues for 30 seconds, with several seconds of idle time, and continues normal state, after several seconds of idle time, in an excited state Data acquisition for 30 seconds was performed.

(Experimental result)
Looking at the spectrum of the biological signal sampling in the relaxed state and the excited state, the significant difference between the two states is clear. Table 1 shows the NB values of 8 subjects.

(Conclusion)
Experiments have shown that there is a correlation between NB values and human mental status.

  The mental state changing device according to the present invention can be widely used as a game for reducing stress, raising consciousness, and competing for fluctuation values. By adding various audiovisual contents to this apparatus, it can be used in a wide range.

DESCRIPTION OF SYMBOLS 1 Biosignal detection means 11 Outer cover 12 Hard electrode 13 Button battery 14 Electrode cover 15 Electrode holder 16 Electrode case 17 Film electrode 2 Transmitter 3 Receiver 4 Audiovisual content 5 Application system 6 Headphone 7 Monitor 8 Computer

Claims (5)

  A biological signal detecting means for detecting a biological signal by contacting an electrode with a forehead of a user; a transmitting means for wirelessly transmitting the biological signal detected by the biological signal detecting means; and a biological signal wirelessly transmitted from the transmitting means Receiving means for wirelessly receiving the signal, conversion means for performing an FFT process on the biological signal detected by the biological signal detection means to obtain an electroencephalogram power spectrum, and power in a predetermined frequency band from the electroencephalogram power spectrum processed by the conversion means. Extraction means for extraction, calculation means for calculating the total amount of the extracted electroencephalogram power values, analysis means for digitizing as an index based on the total amount of the extracted electroencephalogram power values, and presenting to the user In the mental state change device comprising storage means for storing audiovisual content and control means for controlling each of the means, the analysis means allows the user to Mental status characterized by comparing and calculating the pre-experience numeric value, the post-experience numeric value, and the fluctuating value with respect to the pre-experience numeric value so that the user can visually visualize the fluctuating value after viewing. Fluctuating device.   The analysis unit of the mental state changing device continuously calculates an index before and after viewing of audiovisual content and continuously provides a degree of change of the index as a numerical value and / or an image. The mental state changing device according to claim 1.   The mental state changing device stores a target value storage means for preliminarily storing a reduction or increase target value with respect to an index before viewing before the user views the audiovisual content, and an index calculated after viewing the audiovisual content. 3. A result value storage means for performing comparison, a comparison means for comparing the target value stored in the target value storage means with the result value, and providing a comparison result by the comparison means. Mental state change device of description.   The biological signal detection means of the mental state changing device is configured to be incorporated in an outer cover to be mounted on a user's head, together with a transmitter and a battery unit. The mental state change device described in 1.   The biological signal detection means of the mental state changing device can be detachably mounted on the user's head, and the electrodes that contact the forehead and detect the biological signals are composed of hard electrodes and film electrodes. A film electrode for protecting the electrode is attached to the surface of the hard electrode, the surface of the film electrode is a jelly surface, and the surface opposite to the electrode surface is detachable so that it can be replaced. The mental state changing device according to any one of claims 1 to 4, wherein a detachable adhesive or pressure-sensitive adhesive is attached.

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