Electroencephalogram measurement device

Abstract

To provide a brain wave measuring device in which setting work is easy.SOLUTION: A brain wave measuring device 1 includes an electrode part 10 and a device body part 20 that acquires an electric signal from the electrode part. The electrode part includes a sheet-like horizontally long part 11 in which at least two electrodes 31 and 32 for the forehead are disposed side by side, a vertically long part 12 vertically extending from the horizontally long part, in which a connection part with the device body part is provided at the tip, and a left arm part 13 and a right arm part 14 branching from the vertically long part to the right and left, and extending curved vertically, in which a left ear electrode 33 and a right ear electrode 34 are provided at the tip respectively.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an electroencephalogram measurement device.

Background Art

[0002] Conventionally, as a method for scientifically measuring human sleep, polysomnography (PSG) is known. In PSG, based on measurement data of 20 or more electrodes and sensors including parameters such as respiration and circulation, determination of sleep stages, respiration during sleep, and circulation information (creation of a hypnogram) is performed.

Summary of the Invention

[0003] The inventors of the present invention have intensively studied to find a new technique for scientifically measuring human sleep. As a result, the following findings were obtained. Note that the following findings are merely the trigger for the present invention and do not limit the present invention.

[0004] That is, in PSG, it is necessary to set 20 or more electrodes and sensors on the subject, and the setting work alone may take up to 1 hour. In addition, since it is an inpatient examination with monitoring different from the daily state, the burden on the subject is also large, and there is a possibility of affecting the determination result. Further, since determination of sleep stages and each parameter during sleep (creation of a hypnogram) is performed based on measurement data of 20 or more electrodes and sensors, the analysis takes time.

[0005] The present invention has been made in consideration of the above points. An object of the present invention is to provide a technique capable of solving at least one of the above problems of PSG.

[0006] The electroencephalogram measurement device according to the first aspect of the present invention includes an electrode unit and a device main body unit that acquires an electrical signal from the electrode unit, wherein the electrode unit has a horizontally long portion in a sheet shape in which at least two forehead electrodes are arranged side by side on the left and right, A vertically elongated portion extending in the vertical direction from the horizontally elongated portion, and having a connection portion with the device main body provided at the tip end thereof; A left arm portion and a right arm portion that branch left and right from the vertically elongated portion and then bend and extend in the vertical direction, and having a left ear electrode and a right ear electrode provided at the tip ends thereof, respectively; It has.

[0007] According to such an aspect, the electrode portion has a horizontally elongated portion provided with frontal electrodes, a vertically elongated portion extending in the vertical direction from the horizontally elongated portion, and left and right branches extending from the vertically elongated portion and having a left ear electrode and a right ear electrode provided at the tip ends thereof. Since it has a very simple and unique shape, it can be easily attached by a single subject in a short time and can be used at low cost. In addition, it has a shape that takes into account the comfortable feeling that does not inhibit sleep. As a result, the subject can easily use it at home, and it becomes possible to determine sleep in a daily state. Further, since at least two frontal electrodes are integrally provided on the sheet-shaped horizontally elongated portion and their positional relationship with each other is fixed, each electrode can be arranged in the same positional relationship every time by simply attaching the sheet-shaped horizontally elongated portion to the forehead portion. In addition, by attaching the frontal electrode to the forehead portion of the subject, it is possible to detect the movement of the eyeballs in addition to the brain waves. Further, by attaching the left ear electrode and the right ear electrode behind the left and right ears of the subject, it is possible to detect the myoelectric potential of the neck in addition to the brain waves. Therefore, in addition to the brain waves, signals of the movement of the eyeballs and the myoelectric potential of the neck can be used, so that the accuracy of sleep determination can be improved.

[0008] The electroencephalogram measuring device according to the second aspect of the present invention is the electroencephalogram measuring device according to the first aspect, A reference electrode is further provided on the horizontally elongated portion.

[0009] The electroencephalogram measuring device according to the third aspect of the present invention is the electroencephalogram measuring device according to the second aspect, The reference electrode is provided between the left and right frontal electrodes.

[0010] According to such an aspect, at least two frontal electrodes and a reference electrode are integrally provided on the horizontally long portion of the sheet shape, and since their relative positions are fixed, by simply attaching the horizontally long portion of the sheet shape to the frontal portion, each electrode can be arranged in the same positional relationship every time, and it is possible to suppress variations in the determination result due to changes in the positional relationship of each electrode.

[0011] The electroencephalogram measurement device according to the fourth aspect of the present invention is the electroencephalogram measurement device according to any one of the first to third aspects, and The length between the proximal ends of the left and right arm portions and the horizontally long portion is 5 to 10 cm.

[0012] As a result of intensive studies by the inventors of the present case, according to such an aspect, it is possible to reduce the pain felt by the subject in the ears and more effectively prevent interference with sleep.

[0013] The electroencephalogram measurement device according to the fifth aspect of the present invention is the electroencephalogram measurement device according to the fourth aspect, and The length between the proximal ends of the left and right arm portions and the horizontally long portion is 6 to 9 cm.

[0014] As a result of intensive studies by the inventors of the present case, according to such an aspect, it is possible to further reduce the pain felt by the subject in the ears and more effectively prevent interference with sleep.

[0015] The electroencephalogram measurement device according to the sixth aspect of the present invention is the electroencephalogram measurement device according to any one of the first to fifth aspects, and The length between the proximal ends of the left and right arm portions and the horizontally long portion is shorter than the length between the proximal ends of the left and right arm portions and the connecting portion.

[0016] The electroencephalogram measurement device according to the seventh aspect of the present invention is the electroencephalogram measurement device according to any one of the first to sixth aspects, and It has a bilaterally symmetric shape.

[0017] The electrode unit according to the eighth aspect of the present invention is An electrode unit that is detachable from the device main body of an electroencephalogram measurement device, A horizontally long sheet-like part in which forehead electrodes are arranged side by side, A vertically long part extending in the vertical direction from the horizontally long part, and having a connection part with the device main body provided at the tip, Left and right arm parts that branch in opposite left and right directions from the vertically long part and then bend or curve in the vertical direction and extend, and have a left ear electrode and a right ear electrode provided at the tips respectively, and having the following.

[0018] According to such an aspect, the electrode unit has a very simple and unique shape including a horizontally long part provided with forehead electrodes, a vertically long part extending in the vertical direction from the horizontally long part, and left and right arm parts that branch and extend left and right from the vertically long part and have a left ear electrode and a right ear electrode provided at the tips respectively. Therefore, even a single subject can easily attach it in a short time and it can be used at low cost. Also, it has a shape considering a comfortable fit that does not inhibit sleep. As a result, the subject can easily use it at home, and it becomes possible to determine sleep in a daily state. Further, at least two forehead electrodes are provided on the horizontally long sheet-like part and their relative positions are fixed. Therefore, by simply attaching the horizontally long sheet-like part to the forehead portion, it is possible to accurately arrange the electrodes at the same position every time. Also, by attaching the forehead electrodes to the subject's forehead portion, in addition to the electroencephalogram, the movement of the eyeballs can be detected. Further, by attaching the left ear electrode and the right ear electrode behind the subject's left and right ears, in addition to the electroencephalogram, the electromyogram of the neck can be detected. Therefore, in addition to the electroencephalogram, signals of the movement of the eyeballs and the electromyogram of the neck can be used, so that the accuracy of sleep determination can be improved.

Brief Description of the Drawings

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[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, components having the same function are denoted by the same reference numerals, and detailed descriptions of components denoted by the same reference numerals will not be repeated.

[0021] FIG. 1 is a diagram showing a schematic configuration of an electroencephalogram measurement device 1 according to an embodiment.

[0022] As shown in FIG. 1, the electroencephalogram measurement device 1 includes an electrode unit 10 and a device main body unit 20 that acquires an electrical signal from the electrode unit 10.

[0023] This electroencephalogram measurement device 1 is, for example, lent by an electroencephalogram analysis service provider to a subject (user) for a certain period (for example, one week), measures electroencephalograms for multiple nights and stores them in the device main body unit 20, and then is returned. Subsequently, the service provider uploads the data stored in the device main body unit 20 to an external (for example, on-cloud) electroencephalogram analysis system all at once for sleep analysis. The device main body unit 20 may be charged by a charger (not shown) and operate with a built-in battery 26 (see FIG. 10).

[0024] As shown in FIG. 1, the electrode unit 10 may be detachable from the device main body unit 20. As shown in FIGS. 5 to 9, the electrode unit 10 is a part that is worn on the subject's head and used, and is likely to get dirty or damaged during use. However, since it is configured to be detachable from the device main body unit 20, even when the electrode unit 10 gets dirty or damaged, it is possible to easily replace only the electrode unit 10.

[0025] The electrode unit 10 may be disposable (disposable) for a predetermined period (for example, one week) or number of times. In this case, compared with a non-disposable type (for example, a type designed on the premise of being repeatedly used by washing or replacing only the worn parts), it is possible to lower the level of mechanical durability required for the electrode unit 10, and it is possible to provide it at a lower cost. In addition, since continuous measurement for multiple days can be performed by disposable use, troublesome maintenance work becomes unnecessary, and the subject can easily use it at home.

[0026] FIG. 2 is a diagram showing a schematic configuration of the electrode unit 10. FIG. 5 is a front view showing a state where the electrode unit 10 is attached to the head of a subject. FIG. 6 is a right side view (viewed from the left side for the subject) showing a state where the electrode unit 10 is attached to the head of the subject. FIG. 7 is a left side view (viewed from the right side for the subject) showing a state where the electrode unit 10 is attached to the head of the subject. FIG. 8 is a perspective view showing a state where the electrode unit 10 is attached to the head of the subject as viewed obliquely from the front. FIG. 9 is a perspective view showing a state where the electrode unit 10 is attached to the head of the subject as viewed obliquely from the rear.

[0027] As shown in FIG. 2, the electrode unit 10 includes a horizontally long portion 11 in the form of a sheet, a vertically long portion 12 extending in the vertical direction from the horizontally long portion 11, and left and right arm portions 13 and 14 that branch left and right from the vertically long portion 12 and then bend and extend in the vertical direction. The electrode unit 10 may have a bilaterally symmetric shape.

[0028] Among these, at least two forehead electrodes 31 and 32 are provided side by side in the horizontally long portion 11. The distance between the left and right forehead electrodes 31 and 32 is set to a length such that the forehead electrodes 31 and 32 can be attached at the positions of the frontal poles Fp1 and Fp2 in the 10 / 20 method. A reference electrode 35 may be further provided in the horizontally long portion 11. As shown in FIG. 2, the reference electrode 35 may be provided between the left and right forehead electrodes 31 and 32. The forehead electrodes 31 and 32 and the reference electrode 35 may be detachably attached to the base paper 41 so that the conductive gel does not dry out.

[0029] Since at least two forehead electrodes 31 and 32 and the reference electrode 35 are integrally provided in the sheet-like horizontally long portion 11 and their relative positions are fixed, as shown in FIGS. 5 to 9, by simply attaching the sheet-like horizontally long portion 11 to the forehead portion of the subject, it is possible to arrange each of the electrodes 31, 32, and 35 in the same relative position every time, and it is possible to suppress variations in the determination results due to changes in the relative positions of the electrodes 31, 32, and 35.

[0030] FIG. 3 is a diagram showing an example of a cross section obtained by cutting the horizontally long portion 11 of the electrode unit 10 along line A-A shown in FIG. 2.

[0031] As shown in FIG. 3, the horizontally long portion 11 may have a sheet-like electrode holding member 51, an insulating base material 54 laminated and disposed on the electrode holding member 51 via an adhesive 51a, an electrode and a signal conductor 55 laminated and disposed on the insulating base material 54, and a conductive gel 56 laminated and disposed on the electrode 55. A backing sheet 41 is detachably attached on the conductive gel 56.

[0032] As the electrode holding member 51, for example, a non-woven fabric or a foamed resin may be used. In this case, the comfort of the horizontally long portion 11 is improved, and it is possible to prevent disturbing sleep.

[0033] As shown in FIG. 2, at the left and right end portions of the horizontally long portion 11, protrusions 11a and 11b may be provided for the subject to pinch with a finger when peeling off the forehead electrodes 31 and 32 and the reference electrode 35 from the backing sheet 41 (or the forehead portion of the subject). Thereby, the operation of peeling off the forehead electrodes 31 and 32 and the reference electrode 35 from the backing sheet 41 (or the forehead portion of the subject) becomes easy.

[0034] As shown in FIG. 2, a left ear electrode 33 is provided at the tip of the left arm portion 13, and a right ear electrode 34 is provided at the tip of the right arm portion 14. The lengths of the left arm portion 13 and the right arm portion 14 are set such that the left ear electrode 33 and the right ear electrode 34 can be attached at the positions of the auricles A1 and A2 (behind the ears in the examples shown in FIGS. 6 and 7) in the 10 / 20 method. The left ear electrode 33 and the right ear electrode 34 may be detachably attached to the backing sheet 42 so that the conductive gel does not dry out.

[0035] As shown in FIG. 2, display portions 13a and 14a indicating left ear use or right ear use may be provided at the tip portions of the left arm portion 13 and the right arm portion 14, respectively. In the illustrated example, the display portions 13a and 14a are the characters "Left" and "Right", but are not limited to characters as long as they can distinguish between left ear use and right ear use, and may be symbols, colors, or shapes. By providing the display portions 13a and 14a at the tip portions of the left arm portion 13 and the right arm portion 14, it is possible to prevent the subject from accidentally attaching the left ear electrode 33 and the right ear electrode 34 in reverse, thereby improving the determination accuracy.

[0036] As shown in FIG. 2, the display portions 13a and 14a of the left arm portion 13 and the right arm portion 14 may be provided at an angle tilted left-right in the vertical direction (i.e., the direction in which the arm portions 13 and 14 extend). In this case, as shown in FIGS. 6, 7, and 9, when the left ear electrode 33 and the right ear electrode 34 are attached behind the ear in the direction in which the display portions 13a and 14a of the left arm portion 13 and the right arm portion 14 are straight, the left arm portion 13 and the right arm portion 14 will extend while tilting backward from the head (instead of extending straight upward), so that the left arm portion 13 and the right arm portion 14 will not hit behind the ear, effectively preventing interference with sleep.

[0037] As shown in FIG. 2, protrusions 13b and 14b may be provided at the tip portions of the left arm portion 13 and the right arm portion 14 for the subject to pinch with a finger when peeling the left ear electrode 33 or the right ear electrode 34 from the mount 42 (or the back portion of the subject's ear). This facilitates the operation of peeling the left ear electrode 33 or the right ear electrode 34 from the mount 42 (or the back portion of the subject's ear).

[0038] As shown in FIG. 2, the protrusions 13b and 14b of the left arm portion 13 and the right arm portion 14 may be provided at an angle inclined in the left - right reverse direction (inward direction) with respect to the vertical direction (the direction in which the arm portions 13 and 14 extend). In this case, as shown in FIGS. 6, 7, and 9, when the left - ear electrode 33 and the right - ear electrode 34 are attached behind the ears in the direction in which the protrusions 13b and 14b of the left arm portion 13 and the right arm portion 14 become straight, since the left arm portion 13 and the right arm portion 14 extend while inclining backward of the head (rather than extending straight upward), the left arm portion 13 and the right arm portion 14 do not hit behind the ears, and it is possible to effectively prevent the inhibition of sleep.

[0039] As shown in FIG. 2, the vertically - long portion 12 includes signal lines extending from each of the electrodes 31 to 35, and a connection portion 12a with the device main body portion 20 is provided at the tip of the vertically - long portion 12. The connection portion 12a includes output terminals (not shown) of the signal lines extending from each of the electrodes 31 to 35.

[0040] FIG. 4 is a view showing an example of a cross - section obtained by cutting the vertically - long portion 12, the left arm portion 13, and the right arm portion 14 of the electrode portion 10 along the line B - B shown in FIG. 2. The laminated structure of the left arm portion 13 and the right arm portion 14 is the same as that of the vertically - long portion 12. Hereinafter, the laminated structure of the vertically - long portion 12 will be described as a representative.

[0041] As shown in FIG. 4, the vertically - long portion 12 may have a sheet - like first reinforcing material 611, a first insulating base material 631 laminated and disposed on the first reinforcing material 611, a signal conductor 64 (that is, the signal lines extending from each of the electrodes 31 to 35) laminated and disposed on the first insulating base material 631, a second insulating base material 632 laminated and disposed on the signal conductor 64, and a sheet - like second reinforcing material 612 laminated and disposed on the second insulating base material 632.

[0042] As the first reinforcing material 611 and the second reinforcing material 612, for example, a non - woven fabric may be used, or a foamed resin may be used. In this case, the vertically - long portion becomes lightweight and has a good touch, and it is possible to prevent the inhibition of sleep.

[0043] As shown in Fig. 2, a slit 42a for inserting and temporarily fixing the tip of the vertically long portion 12 may be formed in the base sheet 42 to which the left ear electrode 33 and the right ear electrode 34 are attached. In this case, when the device is not in use, by inserting and temporarily fixing the tip of the vertically long portion 12 into the slit 42a, the device can be easily stored.

[0044] As shown in Fig. 2, a cut line may be drawn between the portion of the base sheet 42 to which the left ear electrode 33 is attached, the portion to which the right ear electrode 34 is attached, and the portion where the slit 42a is formed, and they may be separable from each other along the cut line.

[0045] Referring to Fig. 2, the lengths L1 and L2 from the base end portions to the bent portions of the left arm portion 13 and the right arm portion 14 may be shorter than the length L3 between the base end portions of the left arm portion 13 and the right arm portion 14 and the horizontally long portion 11 (that is, L1 < L3 and L2 < L3). As a result of intensive studies by the inventors of the present invention, such a length relationship can reduce the subject's concern (awareness) about the electrode portion 10 mounted on the head and prevent interference with sleep.

[0046] As a result of intensive studies by the inventors of the present invention, in order to reduce the pain felt by the subject in the ears, the length L3 between the base end portions of the left arm portion 13 and the right arm portion 14 and the horizontally long portion 11 may preferably be 5 to 10 cm, more preferably 6 to 9 cm.

[0047] As shown in Fig. 2, the length L3 between the base end portions of the left arm portion 13 and the right arm portion 14 and the horizontally long portion 11 may be shorter than the length between the base end portions of the left arm portion 13 and the right arm portion 14 and the connecting portion 12a. Also, as shown in Fig. 2, the lengths from the bent portions to the tip portions of the left arm portion 13 and the right arm portion 14 may be the same as the length between the base end portions of the left arm portion 13 and the right arm portion 14 and the connecting portion 12a.

[0048] Next, referring to Figs. 1 and 10, the configuration of the device main body portion 20 will be described. Fig. 10 is a block diagram showing a schematic configuration of the device main body portion 20.

[0049] As shown in FIGS. 1 and 10, the device main body 20 has a control unit 21, the connector unit 22 described above, an operation unit 23, a display unit 24, a storage unit 25, and a battery 26.

[0050] Among these, the display unit 24 is an interface for displaying various information to the user from the device main body 20, and is, for example, a display lamp such as an LED. In the example shown in FIG. 1, the display unit 24 has five display lamps 241 to 245 respectively corresponding to the five electrodes 31 to 35. As shown in FIG. 1, so that the correspondence between the five display lamps 241 to 245 and the five electrodes 31 to 35 can be intuitively grasped, the first display lamp 241 corresponding to the left frontal electrode 31, the fifth display lamp 245 corresponding to the reference electrode 35, and the second display lamp 242 corresponding to the right frontal electrode 32 are arranged side by side in a row from left to right. Below the first display lamp 241 corresponding to the left frontal electrode 31, the third display lamp 243 corresponding to the left ear electrode 33 may be arranged, and below the second display lamp 242 corresponding to the right frontal electrode 32, the fourth display lamp 244 corresponding to the right ear electrode 34 may be arranged. Also, as shown in FIG. 1, the first display lamp 241, the fifth display lamp 245, and the second display lamp 242 are surrounded by a figure (outline) having a shape similar to the planar shape of the horizontally long portion 11, and the third display lamp 243 and the fourth display lamp 244 may be surrounded by figures (outlines) having shapes similar to the planar shapes of the tip portions of the left arm portion 13 and the right arm portion 14, respectively. In this case, the correspondence between the five display lamps 241 to 245 and the five electrodes 31 to 35 can be grasped more intuitively. Each of the display lamps 241 to 245 may be configured to display the quality of the contact state between the corresponding electrodes 31 to 35 and the subject's skin, for example, in different colors (blue when the contact state is good, yellow when the contact state is poor, etc.).

[0051] The operation unit 23 is an interface for the user to operate the device main body 20, and is, for example, a push button. When the operation unit 23 (push button) is pressed by the user, the display lamps 241 to 245 are turned off, and the electroencephalogram measurement in the device main body 20 may be started. The operation unit 23 may be recessed stepwise so as not to be accidentally pressed easily when not necessary.

[0052] The storage unit 25 is a non-volatile data storage such as a flash memory, for example. Various data handled by the control unit 21 are stored in the storage unit 25.

[0053] The control unit 21 is a control means for performing various processes of the device main body 20. The control unit 21 may be realized by a processor in the device main body 20 executing a predetermined program, or may be implemented by hardware.

[0054] For example, the control unit 21 may acquire electroencephalogram signals of 4 channels (that is, the left and right frontal electrodes 31 and 32, the left ear electrode 33, and the right ear electrode 34) with reference to the reference electrode 35 by A / D conversion using an analog front end, and then perform filtering and decimation processing. After that, the control unit 21 may write the data converted into the EDF (European Data Format) into the storage unit 25. The control unit 21 may be capable of continuous measurement for up to 12 hours at a time.

[0055] Also, the control unit 21 may monitor the contact state between the electrodes 31 to 35 and the subject's skin simultaneously with the electroencephalogram measurement. For example, the control unit 21 may measure the contact impedance at each of the five electrodes 31 to 35. Based on the measured contact impedance, the control unit 21 may determine whether the contact state is good or bad, and may display the goodness or badness of the contact state on the display unit 24 (display lamps 241 to 245) in different colors, for example. For example, when the control unit 21 determines that the contact state of the left frontal electrode 31 is poor based on the contact impedance of the left frontal electrode 31, the control unit 21 can change the display of the first display lamp 241 from blue to yellow, intuitively informing the user that the contact state of the left frontal electrode 31 is poor (error), and prompting the user to firmly attach the error electrode 31 so that the display lamp 241 turns blue.

[0056] According to the above-described embodiment, since the electrode unit 10 has a very simple and unique shape including a horizontally long portion 11 provided with the frontal electrodes 31 and 32, a vertically long portion 12 extending in the vertical direction from the horizontally long portion 11, and left and right arm portions 13 and 14 that branch and extend from the vertically long portion 12 and are provided with the left ear electrode 33 and the right ear electrode 34 at their tip ends, it is possible for a single subject to easily wear it in a short time and it can be used at low cost. Also, the shape is designed considering a comfortable fit that does not impede sleep. As a result, the subject can easily use it at home, and it becomes possible to determine sleep in a daily state.

[0057] Also, according to the present embodiment, at least two frontal electrodes 31 and 32 are integrally provided on the sheet-like horizontally long portion 11, and since their relative positions are fixed, by simply attaching the sheet-like horizontally long portion 11 to the forehead portion of the subject, each electrode 31 and 32 can be arranged in the same positional relationship every time. Further, when the frontal electrodes 31 and 32 are attached to the forehead portion of the subject, in addition to detecting brain waves, the movement of the eyes can be detected. Also, when the left ear electrode 33 and the right ear electrode 34 are attached behind the left and right ears of the subject, in addition to detecting brain waves, the myoelectric potential of the neck can be detected. Therefore, in addition to brain waves, since signals of the movement of the eyes and the myoelectric potential of the neck can be utilized, the accuracy of sleep determination can be improved.

[0058] In the above-described embodiment, the left arm portion 13 and the right arm portion 14 of the electrode portion 10 branched left and right from the vertically long portion 12 and then bent and extended in the vertical direction, but the present invention is not limited to this. For example, as shown in FIG. 11, the left arm portion 13 and the right arm portion 14 may branch obliquely upward to the left and right from the vertically long portion 12 and then bend and extend in the vertical direction. Alternatively, as shown in FIG. 12, the left arm portion 13 and the right arm portion 14 may branch left and right from the vertically long portion 12 and then curve and extend in the vertical direction.

[0059] In the above-described embodiment, the electroencephalogram measurement device 1 was lent to a subject (user) from a service provider for electroencephalogram analysis for a certain period (for example, one week), the electroencephalograms for a plurality of nights were measured and stored in the device main body 20, and then returned, and then the service provider uploaded the data stored in the device main body 20 all at once to an electroencephalogram analysis system outside (for example, on the cloud) for sleep analysis, but the present invention is not limited to this. For example, the device main body 20 has a communication unit such as an LTE module, and when the measurement for each night is completed, the data is automatically uploaded to an electroencephalogram analysis system outside (for example, on the cloud) via a network such as an LTE line for sleep analysis. Thereby, the time lag until the electroencephalogram analysis result is returned to the subject can be significantly shortened.

[0060] The description of the above-described embodiments and the disclosure of the drawings are merely examples for explaining the invention described in the claims, and the invention described in the claims is not limited by the description of the above-described embodiments or the disclosure of the drawings. The components of the above-described embodiments can be arbitrarily combined without departing from the gist of the invention.

Description of Reference Numerals

[0061] 1 Electroencephalogram measurement device 10 Electrode part 11 Horizontally long part 11a, 11b Protrusions 12 Vertically long part 12a Connection part 13 Left arm part 14 Right arm part 13a, 14a Display part 13b, 14b Protrusions 20 Device main body part 21 Control part 22 Connector part 23 Operation part 24 Display part 241~245 Display lamps 25 Memory part 26 Battery 31, 32 Electrodes for forehead 33 Electrode for left ear 34 Electrode for right ear 35 Reference electrode 41, 42 Mounting board 42a Slit 51 Electrode holding material 51a Adhesive 54 Insulating base material 55 Electrodes and signal conductors 56 Conductive gel 611 First reinforcing material 612 Second reinforcing material 631 First insulating base material 632 Second insulating base material 64 Signal conductor

Claims

1. An electroencephalogram measurement device comprising an electrode unit and a device main body unit that acquires an electrical signal from the electrode unit, wherein the electrode unit has a horizontally long sheet-like part in which at least two frontal electrodes are provided side by side horizontally, a vertically long part extending vertically from the horizontally long part and having a connection part with the device main body unit provided at its tip, and left and right arm parts that branch out left and right from the vertically long part and then bend or curve in the vertical direction and extend, with a left ear electrode and a right ear electrode provided at their tips respectively, and the length between the base ends of the left and right arm parts and the horizontally long part is 5 to 10 cm. An electroencephalogram measurement device.

2. A reference electrode is further provided on the horizontally long part. The electroencephalogram measurement device according to Claim 1.

3. The reference electrode is provided between the left and right frontal electrodes. The electroencephalogram measurement device according to Claim 2.

4. The length between the base ends of the left and right arm parts and the horizontally long part is 6 to 9 cm. The electroencephalogram measurement device according to any one of Claims 1 to 3.

5. The length between the base ends of the left and right arm parts and the horizontally long part is shorter than the length between the base ends of the left and right arm parts and the connection part. The electroencephalogram measurement device according to any one of Claims 1 to 4.

6. The electrode unit has a bilaterally symmetric shape. The electroencephalogram measurement device according to any one of Claims 1 to 5.

7. An electrode unit detachable from the device main body unit of an electroencephalogram measurement device, having a horizontally long sheet-like part in which at least two frontal electrodes are provided side by side horizontally, a vertically long part extending vertically from the horizontally long part and having a connection part with the device main body unit provided at its tip, and left and right arm parts that branch out left and right from the vertically long part and then bend or curve in the vertical direction and extend, with a left ear electrode and a right ear electrode provided at their tips respectively, and the length between the base ends of the left and right arm parts and the horizontally long part is 5 to 10 cm. An electrode unit.

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