CN117898746A - Motion threshold detection method and system - Google Patents
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
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Abstract
The invention discloses a motion threshold detection method, which comprises the following steps: s1, performing magnetic stimulation on a user for two times respectively, and collecting and recording electromyographic signal amplitudes corresponding to the abductor hallucis brevis of the two magnetic stimulation respectively; s2, constructing an n-1 order curve according to electromyographic signal amplitude fitting corresponding to the magnetic stimulation, and calculating the corresponding treatment intensity P n‑1 when the electromyographic signal amplitude is 50 mu V by using the n-1 order curve; n is the number of magnetic stimulation and is more than or equal to 2; s3, performing next magnetic stimulation by taking P n‑1 as treatment intensity, updating the magnetic stimulation times n=n+1, and collecting and recording the electromyographic signal amplitude V n corresponding to the abductor hallucis brevis of the magnetic stimulation; s4, detecting whether V n is between [50 mu V,55 mu V ], if yes, determining P n‑1 as a movement threshold value of treatment and recording, and if not, repeatedly executing S2 to S4 until n >6. Meanwhile, a motion threshold detection system is also disclosed.
Description
Technical Field
The invention relates to the technical field of medical detection, in particular to a motion threshold detection method and a motion threshold detection system.
Background
Motor evoked potentials (Motor Evoked Potentials, MEPs) are a neuroelectrophysiologic examination designed to detect motor nervous system function following somatosensory evoked potentials. When a transcranial magnetic stimulation (TRANSCRANIALMAGNETIC STIMULATION, TMS) system is used for treating a patient, a motion threshold value needs to be determined firstly, namely, the minimum head stimulation intensity when the target muscle records to be more than 50 mu VMEP is determined, then the stimulation intensity is taken as a standard point, and the parameter of a treatment scheme is formulated in cooperation with a transcranial magnetic prescription.
At present, the movement threshold is clinically measured mainly by a muscle spasm visual measurement method and a single electromyography observation method, wherein the muscle spasm visual measurement method is to perform single magnetic stimulation on a measured patient, and continuously adjust the magnetic stimulation intensity until the shaking and the spasm of the thumb of the measured patient are observed, so that the movement threshold can be determined; while single click electromyography, while also a single magnetic stimulus to the measured patient, differs from visual examination of muscle spasms in that the method determines the motor threshold by observing whether the myoelectric amplitude of the abductor hallucis brevis is greater than 50 μv. Although the two methods can measure and obtain the motion threshold, the measurement efficiency is lower, the technical requirements on operators are higher, and the measurement accuracy is not accurate enough depending on the experience of the operators.
Disclosure of Invention
The invention aims to provide a motion threshold detection method and a motion threshold detection system capable of rapidly detecting a motion threshold.
In order to solve the above technical problem, according to an aspect of the present invention, there is provided a motion threshold detection method, including:
s1, performing magnetic stimulation with different intensities on a user for two times respectively, and collecting and recording two electromyographic signal amplitudes corresponding to the abductor hallucis brevis of the two magnetic stimulation respectively;
S2, constructing an n-1 order curve according to electromyographic signal amplitude fitting corresponding to the magnetic stimulation, and calculating the corresponding treatment intensity P n-1 when the electromyographic signal amplitude is 50 mu V by using the n-1 order curve; wherein n is the number of times of magnetic stimulation, and n is more than or equal to 2;
s3, performing next magnetic stimulation by taking P n-1 obtained by calculation of an n-1 order curve as treatment intensity, updating the magnetic stimulation times n=n+1, and collecting and recording the electromyographic signal amplitude V n corresponding to the abductor hallucis brevis of the next magnetic stimulation;
S4, detecting whether the electromyographic signal amplitude V n is between [50 mu V,55 mu V ], if yes, determining P n-1 as a movement threshold value of treatment and recording, and if not, repeatedly executing S2 to S4 until n >6.
To solve the above technical problem, according to another aspect of the present invention, there is also provided a motion threshold detection system, including:
The transcranial magnetic host is used for sequentially carrying out magnetic stimulation on users and updating the magnetic stimulation times n=n+1;
MEP apparatus, comprising:
The acquisition module is used for acquiring and recording the myoelectric signal amplitude V n of the initial two-time magnetic stimulation abductor hallucis brevis and the myoelectric signal amplitude V n of the subsequent magnetic stimulation abductor hallucis brevis; wherein V n is the electromyographic signal amplitude of the abductor hallucis brevis of the nth magnetic stimulation;
The data analysis module is used for fitting and constructing an n-1 order curve according to the electromyographic signal amplitude corresponding to the n magnetic stimulation, and calculating the corresponding treatment intensity P n-1 when the electromyographic signal amplitude is 50 mu V by utilizing the n-1 order curve; wherein n is more than or equal to 2 and less than or equal to 6; and then when the transcranial magnetic host computer carries out the next magnetic stimulation by taking P n-1 obtained by calculation of an n-1 order curve as the treatment intensity, detecting whether the amplitude V n of the electromyographic signal acquired by the magnetic stimulation is between [50 mu V and 55 mu V ], if so, determining the P n-1 obtained by calculation as the movement threshold of the treatment and recording.
The beneficial technical effects of the invention are as follows: compared with the prior art, the motion threshold detection method comprises the steps of carrying out magnetic stimulation on a user twice with different intensities at the beginning, collecting and recording two electromyographic signal amplitudes corresponding to the thumb abductor of the magnetic stimulation twice, fitting and constructing an n-1 order curve according to the electromyographic signal amplitudes corresponding to the n times (n is more than or equal to 2), calculating the corresponding treatment intensity P n-1 when the electromyographic signal amplitude is 50 mu V by using the n-1 order curve, carrying out the next magnetic stimulation with the P n-1 as the treatment intensity, updating the magnetic stimulation times n=n+1, collecting and recording the electromyographic signal amplitudes V n corresponding to the thumb abductor of the magnetic stimulation twice, detecting whether the electromyographic signal amplitudes V n are between [50 mu V,55 mu V ], if yes, determining the P n-1 is the motion threshold of treatment and recording, and if no, repeatedly executing the steps of fitting and constructing until n is more than 6, and obtaining the corresponding treatment intensity P n-1 when the electromyographic signal is 50 mu V according to the constructed n-1 order curve, carrying out the next magnetic stimulation with the treatment intensity P n-1, carrying out rapid detection on the electromyographic signal amplitude, and carrying out rapid detection on the magnetic stimulation with the magnetic threshold, and verifying the high efficiency.
Drawings
Fig. 1 is a flowchart of a motion threshold detection method according to an embodiment of the invention.
FIG. 2 is a block diagram of a motion threshold detection system according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the drawings and examples below in order to more clearly understand the objects, technical solutions and advantages of the present invention to those skilled in the art.
Referring to fig. 1, fig. 1 is a flowchart of a motion threshold detection method according to an embodiment of the invention. In the embodiment shown in the drawings, the motion threshold detection method includes:
s101, performing magnetic stimulation with different intensities on a user twice respectively, and collecting and recording two electromyographic signal amplitudes corresponding to the thumb abductor muscles of the two magnetic stimulation.
Specifically, in the step, the user is subjected to magnetic stimulation with the intensity of 40% P Max and 45% P Max respectively, and two electromyographic signal amplitudes corresponding to the two magnetic stimulation abductor hallucis brevis are acquired and recorded respectively; where P Max is the maximum treatment intensity, it is understood that the maximum treatment intensity may be a known maximum treatment intensity, i.e., a previously recorded maximum treatment intensity for the patient treatment.
In this embodiment, a magnetic stimulation signal can be generated by the transcranial magnetic host machine to perform magnetic stimulation on a user, the magnetic stimulation can be performed on the user at the beginning of the detection of the movement threshold value by the intensities of 40% P Max and 45% P Max respectively, and the electromyographic signal amplitudes V 1 and V 2 corresponding to the two magnetic stimulation thumb abductors can be collected by the MEP device.
S102, constructing an n-1 order curve according to electromyographic signal amplitude fitting corresponding to the magnetic stimulation, and calculating the corresponding treatment intensity P n-1 when the electromyographic signal amplitude is 50 mu V by using the n-1 order curve; wherein n is the number of times of magnetic stimulation, and n is more than or equal to 2.
According to the invention, an n-1 order curve is constructed according to n electromyographic signal amplitude fitting, the treatment intensity P n-1 corresponding to 50 mu V is calculated, the next magnetic stimulation is carried out according to the treatment intensity P n-1 corresponding to 50 mu V, the electromyographic signal amplitude V n corresponding to the abductor hallucis brevis of the magnetic stimulation is acquired and recorded, the electromyographic signal amplitude V n is detected and verified, and whether the treatment intensity P n-1 is the motion threshold of the user is judged.
And S103, performing the next magnetic stimulation by taking P n-1 obtained by calculation of an n-1 order curve as the treatment intensity, updating the magnetic stimulation times n=n+1, and collecting and recording the electromyographic signal amplitude V n corresponding to the abductor hallucis brevis of the magnetic stimulation.
In the step, the number of magnetic stimulation times is updated after each magnetic stimulation, and meanwhile, the electromyographic signal amplitude V n corresponding to the nth magnetic stimulation abductor brevis is recorded.
S104, detecting whether the electromyographic signal amplitude V n is between [50 mu V,55 mu V ], if yes, determining P n-1 as a movement threshold value of treatment and recording, and if not, repeatedly executing S102 to S104 until n >6.
In this step, if the electromyographic signal amplitude V n is not located between the intervals of [50 μv,55 μv ], fitting construction and the like are repeatedly performed according to the electromyographic signal amplitude V n corresponding to the newly added magnetic stimulus and the previous electromyographic signal amplitude V 1、V2, until n >6.
Specifically, in the present embodiment, when n=2, a first-order curve is constructed by fitting according to the electromyographic signal amplitudes V 1 and V 2 corresponding to the two magnetic stimuli to obtain a first-order curve formulaAnd utilize the formula/>Calculate the corresponding treatment intensity P 1 at V s = 50 μv; wherein V 1 and V 2 are the electromyographic signal amplitudes corresponding to the first magnetic stimulation and the second magnetic stimulation respectively; then, performing the next magnetic stimulation by taking P 1 obtained by calculation of the first-order curve as the treatment intensity, updating the magnetic stimulation times, wherein the magnetic stimulation times are n=3, collecting and recording the electromyographic signal amplitude V 3 corresponding to the abductor muscle of the magnetic stimulation, detecting whether the electromyographic signal amplitude V 3 is between [50 mu V,55 mu V ], if yes, determining P 1 as the movement threshold of the treatment of the user and recording, and preferably, if the obtained P 1≥70％PMax is calculated, the value of the treatment intensity P 1 is P 1＝70％PMax, namely, 70% P Max is defined as the upper limit of the treatment intensity P 1; if not, the fitting construction and other steps are repeatedly executed according to the myoelectric signal amplitude V n corresponding to the newly added magnetic stimulation and the previous myoelectric signal amplitude V 1、V2, namely, a second-order curve is constructed according to the myoelectric signal amplitudes corresponding to the three magnetic stimulation in a fitting way, so that a second-order curve formula is obtained:
Then, the corresponding therapeutic intensity P 2 at V s = 50 μv is calculated using the above formulas (1), (2), (3) and (4); wherein V 3 is the electromyographic signal amplitude corresponding to the third magnetic stimulation; and then carrying out the next magnetic stimulation by taking P 2 obtained by calculation of a second-order curve as the treatment intensity, updating the magnetic stimulation times, wherein the magnetic stimulation times are n=4, collecting and recording the electromyographic signal amplitude V 4 corresponding to the abductor muscle of the magnetic stimulation, detecting whether the electromyographic signal amplitude V 4 is between [50 mu V,55 mu V ], if so, determining P 2 as the motion threshold value of the user treatment and recording, and similarly, if not, carrying out the steps of fitting construction again according to the electromyographic signal amplitude V n corresponding to the newly added magnetic stimulation and the previous electromyographic signal amplitude V 1、V2, and the like, namely, if the motion threshold value is not detected, continuing fitting construction of a third-order curve, a fourth-order curve and a fifth-order curve, and if the electromyographic signal amplitude V 7 corresponding to P 5 obtained by calculation according to the fitting construction does not meet the verification conditions, namely, neither is between [50 mu V,55 mu V ], stopping execution and reporting errors, and prompting the user.
In summary, according to the method for detecting the motion threshold, the corresponding treatment intensity P n-1 when the amplitude of the electromyographic signal is 50 mu V is obtained according to the constructed n-1 order curve, the next magnetic stimulation is carried out according to the treatment intensity P n-1, and the detection verification is carried out on the amplitude of the electromyographic signal corresponding to the magnetic stimulation.
Referring to fig. 2, fig. 2 is a schematic block diagram illustrating a motion threshold detection system 200 according to an embodiment of the invention. In the embodiment shown in the drawings, the motion threshold detection system 200 includes a transcranial magnetic host 21 and an MEP device 22, wherein the transcranial magnetic host 21 is used for generating magnetic stimulation signals, sequentially performing magnetic stimulation on a user, and updating the magnetic stimulation times n=n+1; it will be appreciated that the intensity may be different each time the magnetic stimulus is applied. The MEP device 22 comprises an acquisition module 221 and a data analysis module 222, wherein the acquisition module 221 is used for acquiring and recording the myoelectric signal amplitude of the initial two-time magnetic stimulation abductor hallucis brevis and the myoelectric signal amplitude V n of the subsequent magnetic stimulation abductor hallucis brevis; wherein V n is the electromyographic signal amplitude of the abductor hallucis brevis of the nth magnetic stimulation; preferably, the acquisition module 221 may include an AD acquisition chip and a filter, where the AD acquisition chip is configured to sample a voltage signal of the abductor hallucis brevis during the magnetic stimulation, and amplify the voltage signal; the filter may include a filter having a cut-off frequency of 600Hz, a fourth-order low-pass filter having a cut-off frequency of 10Hz, and a notch having a second order of 50Hz, for sequentially filtering the amplified voltage signal to obtain an electromyographic signal amplitude. The data analysis module 222 is configured to fit and construct an n-1 order curve according to the electromyographic signal amplitude corresponding to the n magnetic stimuli, and calculate the corresponding treatment intensity P n-1 when the electromyographic signal amplitude is 50 μv according to the n-1 order curve; wherein n is more than or equal to 2 and less than or equal to 6; and then when the transcranial magnetic host 21 carries out the next magnetic stimulation with P n-1 obtained by calculation of an n-1 order curve as the treatment intensity, detecting whether the amplitude V n of the electromyographic signal acquired by the magnetic stimulation is between [50 mu V and 55 mu V ], if so, determining the P n-1 obtained by calculation as the movement threshold of the treatment and recording.
When n=2, the transcranial magnetic host 21 is specifically configured to perform magnetic stimulation on the user twice with intensities of 40% p Max and 45% p Max, respectively, and the data analysis module 222 is specifically configured to fit and construct a first-order curve according to electromyographic signal amplitudes V 1 and V 2 corresponding to the two magnetic stimulations to obtain a first-order curve formulaAnd utilize the formula/>Calculating corresponding treatment intensity P 1 when V s = 50 μv, wherein P Max is the maximum treatment intensity, and V 1 and V 2 are the electromyographic signal amplitudes corresponding to the first magnetic stimulation and the second magnetic stimulation respectively; at this time, the transcranial magnetic host 21 is further configured to perform the next magnetic stimulation with P 1 obtained by calculation of the first-order curve as the treatment intensity, and update the number of magnetic stimulation, where the number of magnetic stimulation n=3; the acquisition module 221 acquires and records the myoelectric signal amplitude V 3 of the abductor hallucis brevis of the magnetic stimulation; the data analysis module 222 is further configured to detect whether the magnitude V 3 of the myoelectric signal is between [50 μv,55 μv ] when the transcranial magnetic host 21 performs the next magnetic stimulation with P 1 obtained by calculation of the first-order curve as the treatment intensity, if yes, determine that P 1 is a movement threshold value of the treatment of the user and record, and in this embodiment, if P 1≥70％PMax obtained by calculation, the value of the treatment intensity P 1 is P 1＝70％PMax; if not, the data analysis module 222 is further repeatedly configured to determine a motion threshold according to the myoelectric signal amplitude V n corresponding to the newly added magnetic stimulus and the previous myoelectric signal amplitudes V 1、V2, etc., that is, the data analysis module 222 is further configured to construct a second order curve according to the myoelectric signal amplitudes corresponding to the three magnetic stimuli, so as to obtain a second order curve formula:
Then, the corresponding therapeutic intensity P 2 at V s = 50 μv is calculated using the above formulas (1), (2), (3) and (4); wherein V 3 is the electromyographic signal amplitude corresponding to the third magnetic stimulation; then, the transcranial magnetic host 21 is further configured to perform the next magnetic stimulation with P 2 obtained by calculating a second-order curve as the treatment intensity, update the number of magnetic stimulations, where the number of magnetic stimulations is n=4, the acquisition module 221 is further configured to acquire and record the myoelectric signal amplitude V 4 corresponding to the thumb abductor of the next magnetic stimulation, and the data analysis module 222 is further configured to detect whether the myoelectric signal amplitude V 4 is between [50 μv,55 μv ], if yes, determine P 2 as the movement threshold of the user treatment, and record, i.e., when the treatment intensity P 1 obtained by a first-order curve constructed after performing two magnetic stimulations with different intensities is not the movement threshold of the user, construct a second-order curve according to the myoelectric signal amplitude corresponding to the three magnetic stimulations (n=3), obtain the treatment intensity P 2 corresponding to the myoelectric signal amplitude of 50 μv according to the second-order curve, and perform detection and verification on the myoelectric signal amplitude corresponding to the next magnetic stimulation with the treatment intensity P 2. As can be appreciated, if the therapeutic intensity P 2 obtained by constructing the second order curve according to the electromyographic signal amplitude corresponding to the three magnetic stimuli is not the motion threshold of the user, then constructing the third order curve according to the electromyographic signal amplitude corresponding to the four magnetic stimuli, then obtaining the therapeutic intensity P 3 corresponding to the electromyographic signal amplitude of 50 μv according to the third order curve, and performing the next magnetic stimulus with the therapeutic intensity P 3, performing detection and verification on the electromyographic signal amplitude corresponding to the magnetic stimulus, if the detection and verification P 3 is not the motion threshold of the user, and so on, detecting and obtaining the motion threshold by constructing the fourth order curve and the fifth order curve, if the electromyographic signal amplitude V 7 corresponding to the P 5 calculated according to the fitted and constructed fifth order curve is not in accordance with the verification condition, that is not between [50 μv,55 μv ], stopping execution and reporting errors, prompting the user, so that the user checks whether the motion threshold detection system 200 works abnormally, that is, whether the transcranial magnetic host 21 and MEP device 22 are in a normal state, and whether the parameter settings are correct.
Further, in some embodiments, the MEP device 22 further includes a prompting module 223, where the prompting module 223 is configured to prompt the user when the calculated magnitude of the electromyographic signal is greater than 50 μv and the motion threshold is determined. In this embodiment, the prompting module 223 includes an indicator light that lights up for 1s when the magnitude of the measured electromyographic signal is greater than 50 μv, and blinks for 3 times at 1s when the motion threshold is determined. Based on the design, the prompt function can help therapists to quickly and intuitively obtain necessary data and information without a screen.
In some embodiments, the motion threshold detection system 200 further includes a host computer 23, where the host computer 23 is connected to the MEP device 22, and is configured to obtain and display the amplitude of the electromyographic signal collected by the MEP device 22. It can be known that the upper computer 23 can be used as a display and interaction device for the user to obtain the detection result more intuitively.
As can be seen from the above, the motion threshold detection system 200 of the present invention can also quickly detect the motion threshold of the user through the cooperation of the transcranial magnetic host 21, the MEP device 22 and the host computer 23, and can allow the user to intuitively observe the detection result.
It should be further noted that, in the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments. While, for the purposes of simplicity of explanation, the foregoing method embodiments are shown as a series of acts, it is to be understood and appreciated by those skilled in the art that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes or modifications made within the scope of the claims shall fall within the scope of the present invention.
Claims (10)
1. A motion threshold detection method, characterized in that the motion threshold detection method comprises:
s1, performing magnetic stimulation with different intensities on a user for two times respectively, and collecting and recording two electromyographic signal amplitudes corresponding to the abductor hallucis brevis of the two magnetic stimulation respectively;
S2, constructing an n-1 order curve according to electromyographic signal amplitude fitting corresponding to the magnetic stimulation, and calculating the corresponding treatment intensity P n-1 when the electromyographic signal amplitude is 50 mu V by using the n-1 order curve; wherein n is the number of times of magnetic stimulation, and n is more than or equal to 2;
s3, performing next magnetic stimulation by taking P n-1 obtained by calculation of an n-1 order curve as treatment intensity, updating the magnetic stimulation times n=n+1, and collecting and recording the electromyographic signal amplitude V n corresponding to the abductor hallucis brevis of the next magnetic stimulation;
S4, detecting whether the electromyographic signal amplitude V n is between [50 mu V,55 mu V ], if yes, determining P n-1 as a movement threshold value of treatment and recording, and if not, repeatedly executing S2 to S4 until n >6.
2. The motion threshold detection method according to claim 1, wherein S1 specifically includes: performing magnetic stimulation on a user with the intensity of 40% P Max and 45% P Max respectively, and collecting and recording two electromyographic signal amplitudes corresponding to the two magnetic stimulation abductor hallucis brevis respectively; where P Max is the maximum therapeutic intensity.
3. The motion threshold detection method according to claim 2, wherein when n=2, the S2 specifically includes: constructing a first-order curve according to the electromyographic signal amplitude fitting corresponding to the two magnetic stimuli to obtain a first-order curveAnd utilize the formula/>Calculate the corresponding treatment intensity P 1 at V s = 50 μv; wherein V 1 and V 2 are the electromyographic signal amplitudes corresponding to the first magnetic stimulation and the second magnetic stimulation, respectively.
4. The motion threshold detection method according to claim 3, wherein the S2 further comprises: if the obtained P 1≥70％PMax is calculated, the treatment intensity P 1 is P 1＝70％PMax.
5. The motion threshold detection method according to claim 2, wherein when n=3, the S2 specifically includes: and constructing a second-order curve according to the electromyographic signal amplitude fitting corresponding to the three magnetic stimulations respectively, and obtaining a second-order curve formula:
calculating a corresponding treatment intensity P 2 at V s = 50 μv using the above formulas (1), (2), (3) and (4); wherein, V 1、V2 and V 3 are the electromyographic signal amplitudes corresponding to the first magnetic stimulation, the second magnetic stimulation and the third magnetic stimulation respectively.
6. A motion threshold detection system, the motion threshold detection system comprising:
The transcranial magnetic host is used for sequentially carrying out magnetic stimulation on users and updating the magnetic stimulation times n=n+1;
MEP apparatus, comprising:
The acquisition module is used for acquiring and recording the myoelectric signal amplitude V n of the initial two-time magnetic stimulation abductor hallucis brevis and the myoelectric signal amplitude V n of the subsequent magnetic stimulation abductor hallucis brevis; wherein V n is the electromyographic signal amplitude of the abductor hallucis brevis of the nth magnetic stimulation;
The data analysis module is used for fitting and constructing an n-1 order curve according to the electromyographic signal amplitude corresponding to the n magnetic stimulation, and calculating the corresponding treatment intensity P n-1 when the electromyographic signal amplitude is 50 mu V by utilizing the n-1 order curve; wherein n is more than or equal to 2 and less than or equal to 6; and then when the transcranial magnetic host computer carries out the next magnetic stimulation by taking P n-1 obtained by calculation of an n-1 order curve as the treatment intensity, detecting whether the amplitude V n of the electromyographic signal acquired by the magnetic stimulation is between [50 mu V and 55 mu V ], if so, determining the P n-1 obtained by calculation as the movement threshold of the treatment and recording.
7. The motion threshold detection system of claim 6, wherein when n=2, the transcranial magnetic host is specifically configured to perform magnetic stimulation on the user twice with intensities of 40% p Max and 45% p Max, respectively, and the data analysis module is specifically configured to construct a first order curve according to the myoelectric signal amplitude fitting corresponding to the two magnetic stimulations to obtain a first order curve formulaAnd utilize the formula/>Calculating corresponding treatment intensity P 1 when V s = 50 μv, wherein P Max is the maximum treatment intensity, and V 1 and V 2 are the electromyographic signal amplitudes corresponding to the first magnetic stimulation and the second magnetic stimulation respectively; and detecting whether the amplitude V n of the collected electromyographic signals is between 50 mu V and 55 mu V when the transcranial magnetic host machine carries out the next magnetic stimulation by taking P 1 obtained by calculation of a first-order curve as the treatment intensity, if so, determining the P 1 obtained by calculation as the movement threshold of the treatment and recording.
8. The motion threshold detection system of claim 6, wherein the acquisition module comprises an AD acquisition chip and a filter, the AD acquisition chip being configured to sample a voltage signal of the abductor hallucis brevis and amplify the voltage signal when magnetically stimulated; the filter is used for filtering the amplified voltage signal to obtain the electromyographic signal amplitude.
9. The motion threshold detection system of claim 6, wherein the MEP device further comprises a prompt module for prompting a user when the calculated magnitude of the electromyographic signal is greater than 50 μv and the motion threshold is determined.
10. The motion threshold detection system of claim 6, further comprising a host computer coupled to the MEP device for obtaining and displaying the magnitude of the electromyographic signal acquired by the MEP device.
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