JP2800912B2 - Body sway meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a medical equilibrium function test,
The present invention relates to a center of gravity sway meter used for measuring the center of gravity of a subject in fields such as balance function recovery training, exercise engineering, and ergonomics.

[0002]

2. Description of the Related Art Equilibrium function tests, which are central to the diagnosis of dizziness and imbalance, rehabilitation medicine, physical education,
BACKGROUND ART In the field of sports medicine, a body sway meter that records body sway appearing in an upright posture as a center of gravity sway is used.

[0003] A conventional center of gravity sway meter is, for example, as shown in FIG.

The center of gravity sway meter 1 includes a body sway data measuring device 1a having a detection plate 2 on which a patient puts both feet and a plurality of load detecting sensors 3 #, and a plurality of load detecting devices of the body sway data measuring device 1a. A center-of-gravity data analysis device 1b including a calculation unit 4 for calculating the center of load based on the signal from the sensor 3 # and using the center of gravity as the center of the patient, and the center-of-gravity data analysis device 1b And a printer 5 for displaying the center of gravity of the image. And, with such a configuration, the center of gravity sway meter 1
When the patient takes a standing posture with both feet on the detection plate 2,
Each load detecting sensor 3 # detects a load applied to each position, and a calculating unit 4 of the center-of-gravity sway data analyzing device 1b calculates a load center (centroid) of the patient from the detected values, and further obtains the center. The center of gravity can be displayed by the printer 5 as a trajectory K indicating the movement of the center of gravity as shown in FIG. 5, for example.

According to such a center of gravity sway meter, the state of the fluctuation of the center of gravity of the patient can be known by looking at the trajectory K displayed on the printer 5, so that the state of the balance function of the patient can be grasped. It has become. That is,
From the figure formed by the outline L1 of the locus K shown in FIG. 5, the center point is estimated and identified as the apparent center-of-gravity center position G1 of the patient.
By observing whether the center of gravity shifts more or less to the front, back, left and right, the state of the patient's balance function can be determined.

[0006] Except for the evaluation using the center-of-gravity center position G1 and the trajectory K, the total trajectory length L of the trajectory of the center-of-gravity position of the subject under measurement, and the outermost peripheral line L of the trajectory figure formed by the trajectory
The area inside 1 (peripheral area D) and the like are also used for the evaluation of the pathological condition of the imbalance, and when evaluating the control of the upright posture of the vision, etc., the measurement of the sway of the center of gravity is performed in the two states of closed and open eyes. Then, a ratio obtained by dividing a measurement parameter (for example, the outer peripheral area D) in the eye-opening measurement by a measurement parameter in the eye-opening measurement (in the field of body sway measurement, a ratio obtained by dividing an eye-closure value by an eye-opening value is generally referred to as a Romberg ratio. Call)
Evaluation is performed based on the ratio of the closed eye value / opened eye value (Romberg rate).

Recently, the center of gravity has been recorded in a storage device such as a RAM at predetermined sampling times during the measurement time, and after the measurement, the center of gravity center is automatically calculated based on the data of the center of gravity (center of gravity). A center of gravity oscillometer that automatically calculates the position G0), the total trajectory length L, the outer peripheral area D, etc., and outputs the data to a printer has also been manufactured. (Distance between the center of the sole and the center of gravity center G0), the Romberg rate, and the like, are used to evaluate the condition of the imbalance disorder.

[0008]

However, in the above-mentioned conventional center of gravity sway meter, both the open-eye sway test and the closed-eye sway test are performed, for example, when evaluating the control of the upright posture of the eyes. When it is necessary to determine the ratio of the eye opening values (Romberg ratio), the values of various parameters obtained by performing the center of gravity sway measurement with the eyes open and the values of the parameters obtained by performing the center of gravity sway measurement with the eyes closed Therefore, there has been no other method but to calculate the ratio of the closed eye value / opened eye value (Romberg rate) by manual calculation.

The present invention has been made in view of the above problems, and an object of the present invention is to perform both an open-eye sway test and an closed-eye sway test in order to evaluate upright posture control and the like. When comparing the result of eye opening and the result of closing the eye, the ratio (Romberg rate) obtained by dividing the parameter value obtained by the eye closing measurement by the parameter value obtained by the eye opening measurement is automatically obtained, and the center of gravity that can be output An object of the present invention is to provide a wobble meter.

[0010]

Means for Solving the Problems Claim 1 of the present invention
The body sway meter described requires that the subject have an open eye.
Body sway measurement, which measures body sway as
Center of gravity sway measuring center of gravity sway with eye condition
A center-of-gravity sway data measuring device (10a) for performing measurement, and an eye-opening measurement and
Perimeter area, unit area trajectory length, and sway average in closed eye measurement
A stabilometer meter having a body sway data analyzer for calculating at least one parameter (10b) of the center offset, the sway data analyzing apparatus, parameters in the parameter and the eye opening measurement in said closed eye measurement
And dividing means for determining the ratio of the over motor (16), to output the said ratio
And an output unit (for example, the image display unit 20) .

[0011] In the center of gravity sway meter according to the second aspect, the first aspect.
In the center of gravity sway meter according to the above, the output unit is an image display unit
(20) is a solution to the above problem.
It was a step.

According to a third aspect of the present invention, there is provided a gravity center sway meter.
The oscillating meter according to claim 1, wherein the output unit is a printer.
Is a means for solving the above problem.
Was.

[0013]

According to the gravitational sway meter of the first aspect, when evaluating the control of the upright posture of the visual sense, both the open gravitational sway test and the closed gravitational sway test are performed, and the ratio of the closed eye value / opened eye value (Romberg rate) ), The subject must have an open eye
Measure the center of gravity sway under the condition that the center of gravity sway measurement, the outer peripheral area, the unit area trajectory length, and the sway calculated by the center of gravity sway data analyzer based on the actual measurement by the
The condition is that the value of at least one parameter of the average central deviation (eye open value) and that the subject is in the closed state
Te periphery area sway data analyzer is calculated based on the measured body sway data measurement apparatus in postural stability measurement for measuring body sway, unit area trajectory length, upset average center-polarized
From the value of at least one parameter among the positions (eye closed value), the dividing means provided in the center-of-gravity sway data analyzer automatically obtains the ratio of the closed eye value / opened eye value (Romberg rate), and outputs
Output to Therefore, by continuously measuring the eye open center sway test and the closed eye center sway test, the outer peripheral area and the unit area locus are automatically calculated.
Eye closure value of at least one of the longest and the mean deviation of the sway /
Since the ratio of eye opening values (Romberg ratio) is calculated and output,
This is useful for a center of gravity sway test or the like in which it is necessary to compare the result of opening the eye with the result of closing the eye.

According to the center of gravity sway meter described in claim 2,
The output of the body sway meter according to item 1 is output to the image display unit.
Is performed, the outer peripheral area displayed on the image display unit, the unit
At least one of the area locus length and the mean deviation
Refer to the ratio of the eye closed value / opened value (Romberg ratio) of the parameter.
The same operation as the gravity center sway meter according to claim 1 is performed by
Use is obtained.

According to the gravity center sway meter according to the third aspect,
The output of the sway meter described in Item 1 is
As it is performed, the printed outer peripheral area, unit surface
At least one of the product trajectory length and the mean center deviation
Refers to the ratio of closed / opened eye data (Romberg rate)
Thereby, the same operation as the gravity center sway meter according to claim 1 is obtained.
And use the printed result later
You can also.

[0016]

Embodiments of the present invention will be described below in detail.

The parameters calculated by the measurement of the center of gravity sway and the form of output can be variously set according to the purpose. However, as an example of the center of gravity sway meter of the present embodiment, the measurement of the open and closed eyes is performed, and both the measurement of the open and closed eyes are performed. In 1. 1. Area (peripheral area D) 2. Unit area locus length (total locus length L / outer circumference area D) 3. Motion average center deviation (X-axis) (distance of X coordinate between center of sole and center of gravity center G0; + if G0 is rightward,-if G0 is leftward) The average center deviation (Y axis) of the sway (distance of the Y coordinate between the center of the sole and the center of gravity center G0; + if G0 is before, and − if G0 is behind) is calculated. About the parameters
The ratio of the closed eye value / opened eye value (Romberg ratio) was calculated, and as the normal output, the calculated value of each of the above parameters 1 to 4 in the closed eye measurement and the area Romberg ratio (eye closed outer peripheral area D / eye open outer peripheral area D) of 5 The results will be shown for a center of gravity sway meter that outputs the results as a radar graph.

The diagnostic significance of each parameter and the area Romberg rate calculated in this embodiment is as follows.

Area: Indicates the degree of equilibrium disorder Unit area locus length: Indicates a fine posture control function of proprioceptive reflexes Average shaking deviation (X axis): Muscle tension of limbs and trunk caused by maze disorder Sway average center deviation (Y-axis) for the purpose of examining deviation due to left-right difference: For the purpose of examining the rise and fall of anti-gravity tone Area Rombberg rate: Upright posture control by vision, rear cableway,
The purpose of this study is to examine spinocerebellar tract and maze disorders.

FIG. 1 is a block diagram of an embodiment of the present invention (hereinafter referred to as the present invention).

The center of gravity sway meter comprises a center of gravity sway data measuring device 10a, and a center of gravity sway data analyzing device 10b for performing analysis based on the center of gravity sway data from the center of gravity sway data measuring device 10a and outputting the result. ing.

The center-of-gravity sway data measuring device 10a includes a substantially triangular detection plate 1 on which both feet of a subject (patient) are placed.
1 and three load cells 12 provided on the detection plate 11 for continuously or intermittently detecting the center of load applied to both feet of the patient.
0b is a calculating means 13 for calculating the position of the center of gravity of the patient based on the detection signal from the load cell 12 #, and the position of the center of gravity calculated by the calculating means 13 is set to a predetermined X.
-Converted to a position on the Y coordinate, and converted XY
XY coordinate position storage means 14 for storing coordinate positions as a number of XY coordinates recognized for each preset unit time
And the area (outer peripheral area D), unit area trajectory length (total trajectory length L / outer peripheral area D), and shaking based on a large number of XY coordinates stored in the XY coordinate position storage means 14 during the measurement time. Parameter value calculation means 1 for calculating various parameters of average center deviation (X axis) and fluctuation average center deviation (Y axis)
5, a dividing means 16 for calculating the ratio of the closed eye value / opened eye value (Romberg rate) of the various parameters, a reference value storage means 19 for storing the average and standard deviation of the various parameters by gender and age, An input unit 17 for inputting the gender and age of the (patient), a radar graph creating unit 18 for creating a radar graph, and an image display unit 20 for displaying calculation results and the radar graph are provided.

Here, the arithmetic means 13, the parameter value calculating means 15, the dividing means 16, and the radar graph creating means 18 are a central processing unit (CPU) and an arithmetic processing unit (RAM, ROM, etc.) The XY coordinate position storage means 14 and the reference value storage means 19 are memories such as a RAM provided in the arithmetic processing device (computer). As the image display unit 20, an image display device such as a liquid crystal display device or a CRT is used.

The load cells 12 # are provided at the respective corners of the substantially triangular detection plate 11 so as to form the respective vertices of an equilateral triangle.
Are connected to an amplifier for amplifying the output, a filter for cutting an unnecessary frequency band, and an AD converter. In addition, on the surface on which the foot of the detection plate 11 is put,
A mark 111 for adjusting the position of the foot, such as a dot or a circle, is provided at the center position of each load cell 12 #.

The calculating means 13 calculates the position of the center of gravity in real time, that is, in real time, from the load received by each load cell 12 #. Although the load is continuously detected in the load cell 12 #, the arithmetic means 13 calculates the position of the center of gravity by performing an arithmetic operation at every sampling time such as 50 milliseconds, that is, intermittently.

The XY coordinate position storage means 14 includes a conversion function 14a for converting the position of the center of gravity calculated by the calculation means 13 into a position on the XY coordinate set in advance, and a conversion function 14a for storing the converted XY coordinate position in advance. And a storage function 14b for storing as a number of XY coordinates recognized for each set unit time. Here, in this example, the preset XY coordinates refer to the position of the mark 111 as the origin and the base of the equilateral triangle formed by the load cell 12 # (the heel is turned when the foot is placed on the detection plate 11). Side) is set so as to be parallel to the X axis.

The parameter value calculating means 15 calculates
A large number of XY stored by the Y coordinate position storage means 14
On the basis of the coordinate positions, the average oscillation deviation (X-axis) and the average oscillation deviation (Y-axis) are calculated from the frequency distribution of each of the X coordinate position and the Y coordinate position, and the total trajectory length L and area ( The outer peripheral area D) is calculated by a specific program, and the unit area locus length (total locus length L / outer peripheral area D) is calculated.

The dividing means 16 determines the ratio (Romberg ratio) of the closed eye value / opened eye value of each of the parameters calculated by the parameter value calculating means 15.

The radar graph creating means 18 calculates the calculated values of each parameter and the Romberg rate calculated by the parameter value calculating means 15 and the dividing means 16 and the gender of the subject (patient) inputted by the input means 17. , Age, and a gender / age average value and standard deviation of the above parameters and the Romberg rate stored in the reference value storage means 19, a radar graph is created as described later, and the result of the radar graph and the like is created. Is output to the image display unit 20.

Note that a printer (not shown) is linked to the center of gravity sway meter 10 of this embodiment, so that the same data as the image displayed on the image display unit 20 can be printed out. I have.

Next, a method of measuring the position of the center of gravity of the patient (subject) using the thus configured center of gravity sway meter 10 and the operation of the center of gravity sway meter of the present embodiment will be described. The measurement procedure is to first measure the sway of the center of gravity with the eyes open, and then measure the sway of the center of gravity with the eyes closed.

First, the gender, age, etc. of the patient are input by the input means 17, and the patient is put on the detection plate 11 with the eyes open, and the center between the two feet as shown by the two-dot chain line in FIG. The position is aligned with the mark 111, and in that state, the measurement system switch of the sway meter 10 is turned on. Then, during the measurement time, the loads applied to both feet of the patient are detected by the three load cells 12 and sent to the calculating means 13. The calculation means 13 receives the received detection signals and calculates the position of the center of gravity of the patient for each preset unit time from the load received by each load cell 12 # by the same calculation processing as that of the conventional body sway meter. I do.

The position of the center of gravity calculated in this way by the calculating means 13 is converted into a predetermined position on the XY coordinates by the converting function 14a of the XY coordinate position storing means 14, and the unit of eye opening measurement is Many Xs per hour
The information is stored as the Y coordinate and sent to the image display unit 20 for display. Therefore, in the image display unit 20,
The XY coordinates of the center of gravity calculated by the calculating means 13 and converted by the conversion function 14a are sequentially displayed, whereby the movement of the center of gravity of the patient after the start of the measurement is represented by the locus K in FIG.
Will be displayed as

After the measurement of the center of gravity sway with the eyes open, the measurement of the center of gravity with the eyes closed starts.

The patient closes his or her eyes while keeping the foot position and posture of the eye open measurement, and in this state, switches on the measurement system of the body sway meter 10. Then, similarly to the case of the eye-opening measurement, the transition of the center-of-gravity position XY coordinate is displayed as a locus K in FIG. 3 and the XY coordinate storage unit 14 recognizes a large number of XY coordinates recognized for each unit time of the eye-closing measurement. Is stored as

At the end of the eye closing measurement time, the parameter value calculating means 15 is activated, and the area (outer peripheral area D), unit area locus length (total locus length L / outer peripheral area D), and shaking of each of the eye opening measurement and the eye closing measurement are obtained. An average center deviation (X-axis) and a fluctuation average center deviation (Y-axis) are calculated.

Next, the dividing means 16 is activated, and the above-mentioned parameters (area (peripheral area D), unit area trajectory length (total trajectory length L / peripheral area D), oscillating average center deviation (X axis), oscillating The ratio (Romberg rate) of the closed eye value / opened eye value of the average center deviation (Y axis) is calculated.

Next, the radar graph creating means 18 is activated and, as shown below, the area (outer peripheral area D), unit area locus length (total locus length L / outer peripheral area D), and the average fluctuation center in the closed eye measurement are shown below. Creates a radar graph that displays a total of five results of four parameter values of deviation (X-axis) and fluctuation average center deviation (Y-axis) and the Romberg rate of area (peripheral area D), and displays the image display unit 20 and a printer. Output to

The radar graph output in this embodiment is, as shown in FIG. 2, an area (outer peripheral area D), a unit area locus length, a fluctuation average center deviation (X axis), and a fluctuation average center deviation in closed eye measurement. The position (Y axis) and the five parameter axes corresponding to the five results of the area Romberg ratio extend from the center.

The radar graph creating means 18 in this embodiment.
Is the gender input by the input means 17 at the start of the measurement from the above-mentioned parameters and the average value and standard deviation (SD) of the area Romberg rates stored in the reference value storage means 19 for each gender and each age. The average value and the standard deviation (SD) of the above parameters and the area Romberg rate according to the age are taken in, and the respective parameter values and the area Romberg rate calculated by the parameter value calculating means 15 and the dividing means 16 are used. A radar graph is created.

As shown in FIG. 2, each parameter axis is
The innermost is 0, the middle is 5, the outermost is 10, the 5 points are the gender average of each parameter, the 6 points are the mean + 2SD (standard deviation), and 4 points. Point corresponds to the value of mean value-2SD (standard deviation). Points 4 and 6 of each parameter axis are connected by a dotted line, and an average value of -2 is obtained between the dotted lines.
It represents the normal range from SD to mean + 2SD.
By the way, the outermost 10 points are the average value + 10 SD
, And the innermost 0 point represents an average value of −10 SD. When the value obtained in the inspection exceeds the maximum value of the axis scale, the axis scale of all parameters is automatically reduced according to the measured value.

The radar graph creating means 18 first draws the background of each parameter axis and the like set as described above,
Further, the four parameters and the area Romberg ratio in the above-described closed eye measurement are plotted, and the plot positions are connected to each other with a solid line to create a radar graph, which is output to the image display unit 20 and the printer.

In addition, in the center of gravity sway meter of the above-described embodiment, as a normal output, four results in the closed eye measurement and five results of the area Romberg rate are output as a radar graph as described above. Other results (various parameter values for eye opening measurement, Romberg ratio other than the area, etc.) can also be output to the image display unit 20 and the printer in accordance with the command input from the input unit 17.

As described above, in the center-of-gravity sway meter 10 shown in this embodiment, both the open-eye sway test and the closed-eye sway test are performed to determine the ratio of the closed-eye value / open-eye value (Romberg rate). , Various parameter values (eye open value) calculated by the center of gravity data analysis device based on the actual measurement of the center of gravity data measurement device in the measurement of the center of gravity with the eye open, and the actual measurement of the center of gravity data measurement device in the measurement of the center of gravity with the eye closed From the values of various parameters calculated by the center-of-gravity data analyzer (eye-closed value) based on the above, the dividing means of the center-of-gravity data analyzer automatically determines the ratio of the closed-eye value / opened-eye value (Romberg rate), and the result Is output to an output unit such as an image display unit. Therefore, by continuously measuring the open-eye sway test and the closed-eye sway test, the eye closed value /
It becomes a center of gravity sway meter that can output the ratio of eye opening values (Romberg ratio) to an output unit such as an image display unit, and is useful in a center of gravity sway test or the like in which it is necessary to compare the result of opening the eye with the result of closing the eye.

Further, the gravity center sway meter of the present embodiment outputs a radar graph, and the calculated values of the respective parameters are displayed together with the normal range on the image display unit, so that the calculated values are compared with the normal values. Thus, it is possible to clearly understand the value, and to directly grasp the entire feature of the patient's center of gravity sway on the spot.

Further, since the output of the calculated various parameters, the Romberg rate, the radar graph, and the like can be output to the printer, the printed result can be used later.

In the above embodiment, in the closed eye measurement, the area (outer peripheral area D), the unit area locus length, the fluctuation average center deviation (X axis), the fluctuation average center deviation (Y axis), and the area Romberg rate (Closing outer peripheral area / opening outer peripheral area) is shown for a center of gravity sway meter that outputs as a radar graph. In the present invention, a parameter value other than the area is obtained and the ratio of the closed eye value / opened eye value (Romberg rate) is output. Needless to say, the method can be applied to the case, and the output method may be a method other than the radar graph.

The image display unit and the printer as output units may be provided integrally with the center of gravity fluctuation analysis device.
Moreover, you may make it provide separately.

In the above embodiment, an example is shown in which three load cells 12 for detecting the center of load applied to each leg of the subject are provided. However, four load cells may be provided. It is preferable that the detection plate 11 is formed in a rectangular shape so that the load cells are arranged at four corners thereof. Also, two detection plates may be used instead of one so as to correspond to both feet.

In the above embodiment, the center of gravity sway meter of the present invention is mainly used for grasping the balance disorder. However, the present invention measures the center of gravity of the subject in the fields of exercise engineering, ergonomics and the like. It can be used not only in such cases, but also for examining the fluctuation of the center of gravity of animals other than humans.

[0051]

According to the gravity center sway meter according to the first aspect, when evaluating the control of the upright posture of the visibility, both the open-eye sway test and the closed-eye sway test are performed, and the ratio of the closed-eye value / open-eye value is determined. Romberg rate) when the subject is in the open state
Peripheral area and unit area locus calculated by the center of gravity data analyzer based on the actual measurement of the center of gravity data in the center of gravity measurement
At least one of the following parameters:
Other value as the (eye opening value), conditions that the subject is a closed-eye state
The outer peripheral area of body sway data analyzer is calculated based on the measured body sway data measurement apparatus in postural stability measurement for measuring body sway as matter, unit area trajectory length, upset average
From the value of at least one of the central deviations (closed eye value), the dividing means of the center-of-gravity sway data analyzer automatically determines the ratio of closed eye value / opened eye value (Romberg rate) and outputs it to the output unit. I do. Thus, automatically an outer peripheral area, a unit eye opening sway inspection and closed eye body sway inspection continuously measured
At least one of the area locus length and the mean deviation
This is a center of gravity sway meter that can calculate and output the ratio (Romberg ratio) of the closed eye value / open eye value of the parameter, and is useful in a center of gravity sway test or the like in which it is necessary to compare the eye open result with the closed eye result.

According to the sway meter according to the second aspect,
The output of the body sway meter according to item 1 is output to the image display unit.
Is performed, the outer peripheral area displayed on the image display unit, the unit
At least one of the area locus length and the mean deviation
Refer to the ratio of the eye closed value / opened value (Romberg ratio) of the parameter.
The same effect as the sway meter according to claim 1 is obtained by illuminating.
Fruit is obtained.

According to the center of gravity sway meter according to the third aspect,
The output of the sway meter described in Item 1 is
As it is performed, the printed outer peripheral area, unit surface
Product trajectory length and at least one of the
Refer to the ratio of the closed / opened value of the parameter (Romberg ratio)
By doing so, the same effect as the gravity center sway meter according to claim 1
And use the printed results later
You can also.

[Brief description of the drawings]

FIG. 1 is a block diagram of a center of gravity sway meter according to the present embodiment.

FIG. 2 is an example of an output (radar graph) of the center of gravity sway meter of the present embodiment.

FIG. 3 is an example of the output of the center of gravity sway meter of the present embodiment (a center of gravity sway locus K).

FIG. 4 is a block diagram of a conventional general sway meter.

FIG. 5 is an output example of a conventional general center of gravity sway meter (a center of gravity sway locus K).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Gravity center sway meter 10a Gravity center sway data measuring device 10b Gravity center sway data analysis device 16 Division means 20 Image display part

Claims (3)

(57) [Claims] 1. The center of gravity provided that the subject has an open eye
Body sway measurement, which measures sway, and that the subject has closed eyes
To measure body sway under the condition of
A center-of-gravity sway data measuring device and an outer periphery in an eye-opening measurement and a closed-eye measurement based on actual measurement of the center-of-gravity sway data measuring device
Less of area, unit area trajectory length, and fluctuation mean center deviation
And a body sway data analyzer that calculates one parameter , wherein the body sway data analyzer is used in the closed eye measurement.
And dividing means for determining the ratio between the parameter in the parameter and the eye opening measurement, body sway meter, characterized in that an output unit for outputting said ratio. 2. The image processing apparatus according to claim 1, wherein said output section is constituted by an image display section.
The body sway meter according to claim 1, wherein 3. The printer according to claim 2, wherein the output unit is constituted by a printer.
The body sway meter according to claim 1, wherein