JP2005144108A - Evoked myoelectric apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow rapid judgement of effects on the amount of muscle activity during rehabilitation training, such as during physical therapy or the like. <P>SOLUTION: This evoked myoelectric apparatus for measuring the amplitude level of the H reflex calculates and displays, on the basis of the amplitude level of the H reflex, an indicator of stimulation amount from the spinal motor neurons to the muscle of interest. The apparatus measures, automatically or if necessary, the stimulation amount from the spinal motor neurons to the muscle of interest. The indicator of stimulation amount from the spinal motor neurons to the muscle of interest is calculated as follows: the amplitude level of the H reflex in a rest position while lying on one's back is adopted as a reference value; and the measured amplitude level of the H reflex is calculated on the basis of the percentage ratio of the reference value. The calculated indicator of stimulation amount from the spinal motor neuron to the muscle of interest is used as a representative indicator of the amount of activity of the part of or all the muscles of a human body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an evoked myoelectric device, for example, an evoked myoelectric device that quickly displays a simple index of muscle activity in a person who is performing rehabilitation training by physical therapy or the like, or a person who is muscularly training. It can be applied to.

  Conventionally, the evoked myoelectric device has been used as an effective diagnosis of nerve and muscle diseases, but has not been used as a diagnosis of muscle activity.

  If you are forced to rest on your bed, such as during an acute stroke or a femoral neck fracture, you will be forced to restrict movement of all or part of your body. This rest is an important part of the treatment process, but it reduces the activity of the musculoskeletal organs such as bones and muscles, and secondary functions such as disuse muscle atrophy and orthostatic hypotension. Cause trouble. As is well known, the degree of this secondary dysfunction greatly affects the subsequent recovery of the function and ability of the patient.

  Rehabilitation training such as physical therapy is performed as one method to prevent this secondary dysfunction to a minimum, but there is no device for quickly determining specific effects. In many cases, it is unclear whether the training being conducted has an effect or not, and the medical score is also set according to the training time from such a background.

  Conventionally, in such rehabilitation training such as physical therapy, since it is in a state where a rapid effect determination is not performed, various techniques are mixed and confused in physical therapy, and it is doubtful whether a certain technique is really effective There was a problem that there was also something. Therefore, if the effect determination of rehabilitation training can be quickly expressed as a simple index, this mixed / confused technique can be unified and organized, and the quality of physical therapy can be greatly improved. Therefore, an apparatus capable of promptly determining the effect has been demanded.

In order to solve such a problem, the present invention calculates an index of an amount of stimulation from a spinal motor neuron for a target muscle based on the amplitude level of the H wave in an induction myoelectric device that measures the amplitude level of the H wave. To display. (1) The evoked myoelectric device measures the amplitude level of the H wave automatically at predetermined time intervals and / or as necessary. (2) Furthermore, the calculation method of the index of the amount of stimulation from the spinal motor neuron for the target muscle was measured using the amplitude level of the H wave in the resting position of the supine position as a reference value, and the percentage ratio of the reference value. The amplitude level of the H wave is calculated. (3) Furthermore, the calculation method of the stimulation amount index from the spinal motor neuron for the target muscle is based on the amplitude level of the H wave in the resting position of the supine position as a reference value, and the measured H wave of the measured H wave. The difference from the amplitude level is calculated by integrating for a predetermined time. (4) The evoked myoelectric device measures the amplitude level of the M wave, and the calculation method of the stimulus amount index from the spinal motor neuron for the target muscle corrects based on the amplitude level of the M wave.
(5) Further, the induction myoelectric device uses the calculated index of the stimulation amount from the spinal motor neuron for the target muscle as a representative index of the activity amount of a part or all of the muscles of the human body.

  According to the present invention, the excitability of the spinal motor neuron is detected by measuring the amplitude level of the H wave of the evoked myoelectricity, and thereby the amount of muscle activity, which is the amount of stimulation from the spinal motor neuron to the target muscle, is detected. It can be detected promptly. This makes it possible to determine not only the effect of rehabilitation training but also the effect of muscle strength training and the effect of diet.

  Hereinafter, a first embodiment of an induced myoelectric device according to the present invention will be described with reference to the drawings.

  FIG. 1 shows the configuration of the first embodiment. As shown in FIG. 1, 0 is a lower limb of the human body, 1 is a stimulation terminal fixing belt, 2 is a recording terminal fixing belt, and 3 is an induction myoelectric device. Furthermore, 1-1 is a stimulation terminal, 1-2 is a ground belt, 2-1 is a recording terminal, 3-1 is a stimulus generating device, 3-2 is a recording device, 3-3 is a processing device, and 3-4 is a display device. It is.

  The stimulation terminal fixing belt 1 fixes the stimulation terminal 1-1 to the tibial nerve running portion of the popliteal portion. Moreover, it has the ground belt 1-2 made from electricity connected to the ground for preventing the artifact from the stimulation terminal 1-1.

  The recording terminal fixing belt 2 fixes the recording terminal 2-1 to a region where the soleus appears under the skin. Note that the recording terminal is preferably installed in parallel with the sole fiber direction of the soleus with the negative pole in the vicinity at an interval of about 3 cm.

  The evoked myoelectric device 3 electrically stimulates the tibial nerve via the stimulation terminal 1-1 by the stimulation generating device 3-1, and records the action potential evoked from the soleus under the innervation of the recording terminal 2-1. The recording device 3-2 records the signal, the processing device 3-3 calculates the amplitude potential level of the H wave from the recorded action potential waveform, and the display device 3-4 displays the calculation result. .

  Next, an implementation method of the first embodiment will be described.

  1. In order not to affect the mental state, the minimum orientation, such as having pain and testing procedures, is provided. Note that this process is not necessary if language comprehension has deteriorated due to, for example, dementia.

  2. Use skin pure cream to scrape the lipids and keratin on the back of the lower leg where the terminal is placed. Although this step is preferably performed, it is not always necessary.

  3. If possible, confirm the region where the soleus muscle appears subcutaneously from the lower edge of the gastrocnemius muscle by performing resistance movement in the ankle plantar flexion direction if possible, or by visual inspection and palpation if not possible.

  4). The stimulation terminal fixing belt 1 is worn so that the negative pole of the stimulation terminal 1-1 hits the tibial nerve running site of the popliteal portion.

  5). The recording terminal fixing belt 2 is placed so that the negative pole of the recording terminal 2-1 is at the lower edge of the gastrocnemius muscle, and the positive pole of the recording terminal 2-1 is about 3 cm from the negative pole of the recording terminal to the distal side of the gastrocnemius fiber. Mounting.

  6). In a resting dorsal position, the evoked myoelectric device 3 measures the amplitude level of the H wave from the soleus muscle, and uses this value as a reference value. In determining the reference value, for example, about 30 H waves may be measured with an interval of about 1 second, and the average value may be determined.

  7). For example, once every 15 minutes, and / or when necessary, the wearer or the examiner presses a switch (not shown in the figure but assumed to be in the evoked myoelectric device 3). Thus, the amplitude level of the H wave is measured, and the value calculated by the percentage ratio of the reference value measured in the above 6 is displayed on the display device 3-4. When determining this measured value, for example, about 30 times of H waves may be measured with an interval of about 1 second, and the average value may be determined.

  8). For example, patients who undergo rehabilitation training are trained, and those who are trained are trained, and by constantly wearing this device for the required period and measuring the amplitude level of the H wave, the displayed measurement results can be It is used as a simple indicator of muscle activity during training and is used as a criterion for its effect.

  9. Here, it is preferable that the induction myoelectric device 3 has excellent portability, is small and light, and can be easily worn on the waist or the like, such as a pedometer.

  In the description of this embodiment, the case of measuring the amount of soleus muscle activity is shown. However, the amount of soleus muscle activity is only a representative value of the human muscle, and this display result is a part of the human body. Alternatively, it can be used as a representative of all muscle activity.

  As described above, when the present invention is carried out, the state in which the determination as to whether or not the rehabilitation training such as physical therapy has an effect has not been understood, the muscle activity index is quickly understood during the training, It is possible to immediately determine the effect of the training currently being performed.

  Similarly, it is possible to quickly determine the effect of training for a person who is performing training.

  Furthermore, a second embodiment of the evoked myoelectric device according to the present invention will be described.

  The configuration is almost the same as that of the first embodiment, but the processing device 3-3 of the evoked myoelectric device 3 also calculates the amplitude level of the M wave, and calculates the H wave to be calculated according to the magnitude of the amplitude level. The difference is that a correction function to increase or decrease the amplitude level is added.

  About the implementation method, since it is the same to the said 1-5 described in the implementation method of the said 1st Embodiment, description of the location is abbreviate | omitted and it demonstrates from 6.

  6). In a resting dorsal position, the evoked myoelectric device 3 measures the amplitude levels of the M wave and H wave from the soleus muscle, and uses these values as reference values. When determining the reference value, for example, about 30 M waves and H waves may be measured with an interval of about 1 second, and the average value may be determined.

  7). For example, once every 15 minutes, and / or when necessary, the wearer or the examiner presses a switch (not shown in the figure but assumed to be in the evoked myoelectric device 3). To measure the amplitude level of the M wave and H wave, and calculate the value by the percentage ratio of the reference value measured in 6 above. For example, if the percentage ratio of the M wave increases, the percentage ratio of the H wave decreases. On the other hand, if the percentage ratio of the M wave is decreased, the percentage ratio of the H wave is increased, and the calculated percentage ratio of the H wave is corrected and displayed on the display device 3-4. When determining this measurement value, for example, about 30 M waves and H waves may be measured with an interval of about 1 second, and the average value may be determined. The theoretical background of this correction is that when the amplitude level of the M wave increases, the amplitude level of the F wave that runs backward through the spinal motor neurons increases, and the F wave and the H wave influence each other to cancel each other. This is to correct the apparent decrease in the amplitude level of the H wave.

  8). For example, patients who undergo rehabilitation training are trained, and those who are trained are trained, and by constantly wearing this device for the required period and measuring the amplitude level of the H wave, the displayed measurement results can be It is used as a simple indicator of muscle activity during training and is used as a criterion for its effect.

  9. Here, it is preferable that the induction myoelectric device 3 has excellent portability, is small and light, and can be easily worn on the waist or the like, such as a pedometer.

  If the present invention is implemented as described above, in addition to the same effects as those of the first embodiment, it is possible to correct the influence of M waves on the displayed muscle activity amount, and to obtain a more accurate muscle activity amount. Can be displayed.

  As for other embodiments, in the above embodiments, the recording of the induced myoelectricity from the soleus muscle is shown, but other muscles may be used as long as they can measure M wave and / or H wave. For example, the gastrocnemius and the radial carpal flexor may be used.

  Further, in each of the above embodiments, the case of measuring the amount of soleus muscle activity was shown, but the amount of soleus muscle activity is merely a representative value of the muscle of the human body, and this display result is part or all of the human body. It may be representative of muscle activity.

  Further, in each of the above embodiments, the case where the M wave and / or the H wave are measured automatically at a frequency of about once every 15 minutes or when the wearer or the inspector presses the switch when necessary is shown. However, it goes without saying that other frequencies and remote operations may be used.

  Furthermore, in each of the above-described embodiments, the method of calculating the percentage ratio using the amplitude level of the M-wave and / or H-wave in the resting back position as a reference value is shown. However, the measured amplitude level may be displayed as it is. Alternatively, an integral value at a predetermined time interval of a difference between the reference value and the measured amplitude level may be calculated using the amplitude level of the M wave and / or H wave in a resting back position as a reference value. Of course, this calculation method may be included directly or indirectly.

  It is a block diagram of the 1st and 2nd embodiment of this invention.

Explanation of symbols

0 Lower limb of human body 1 Stimulation terminal fixing belt 1-1 Stimulation terminal 1-2 Ground belt 2 Recording terminal fixing belt 2-1 Recording terminal 3 Triggering myoelectric device 3-1 Stimulation generating device 3-2 Recording device 3-3 Processing device 3-4 Display device

Claims (6)

In the evoked myoelectric device that measures the amplitude level of the H wave,
An induced myoelectric device characterized by calculating and displaying an index of a stimulus amount from a spinal motor neuron for a target muscle based on the amplitude level of the H wave. The evoked myoelectric device is:
The evoked myoelectric device according to claim 1, wherein the amplitude level of the H wave is measured automatically at a predetermined time interval and / or as necessary. The calculation method of the index of the amount of stimulation from the spinal motor neuron for the target muscle is as follows:
3. The evoked myoelectricity according to claim 2, wherein the amplitude level of the measured H wave is calculated as a percentage of the reference value of the amplitude level of the H wave in the resting position of the supine position. apparatus. The calculation method of the index of the amount of stimulation from the spinal motor neuron for the target muscle is as follows:
The calculation is performed by integrating a difference between the reference value and the measured amplitude level of the H wave for a predetermined time, using the amplitude level of the H wave in the resting position in the supine position as a reference value. The evoked myoelectric device as described. The evoked myoelectric device measures the amplitude level of the M wave,
The calculation method of the index of the amount of stimulation from the spinal motor neuron for the target muscle is as follows:
It correct | amends based on the amplitude level of the said M wave. The induction myoelectric device of Claims 2-4 characterized by the above-mentioned. The evoked myoelectric device is:
The evoked myoelectricity according to any one of claims 1 to 5, wherein the calculated index of the amount of stimulation from the spinal motor neuron for the target muscle is a representative index of the activity amount of a part or all of the muscles of the human body. apparatus.

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