KR101320632B1 - EMG-controlled active assistive exercise system and therapeutic effect evaluation system based on brain plasticity principle and the method thereof - Google Patents

Abstract

The present invention relates to an EMG-controlled biofeedback exercise apparatus and a method thereof, and more particularly, to an EMG-controlled biofeedback exercise apparatus capable of repeatedly performing accurate and active movements to promote recovery of upper limb motor function of patients with brain lesions. It's about how.
The present invention includes a control unit for driving by using a motor and processing an EMG signal, a control unit for controlling mode settings, an EMG threshold, a speed, and a number of repetitions, and a monitoring unit for monitoring control values of the control unit. It is characterized by.

Description

EMG-controlled active assistive exercise system and therapeutic effect evaluation system based on brain plasticity principle and the method

The present invention relates to an EMG-controlled biofeedback exercise apparatus and a method thereof, and more particularly, to an EMG-controlled biofeedback exercise apparatus capable of repeatedly performing accurate and active movements to promote recovery of upper limb motor function of patients with brain lesions. It's about how.

In general, the recovery of motor function after the brain lesion and the importance of upper extremity motor function have been reported. First, the recovery of motor function after stroke is reported to be most frequent up to 3 months after the onset and weak afterwards (Duncan et al. , Stroke 1992).

In addition, the recovery of motor function of patients with severe symptoms in the early stage of onset was stagnant at about 40%, and the quality of life was severely deteriorated. Early recovery of motor function and intact recovery of severe patients became very important.

This motor dysfunction is more prominent in the upper limbs than the lower limbs, upper limbs dysfunction impairs essential daily life skills such as eating, deteriorating the quality of life, and there is an urgent need for a way to improve the recovery of the upper extremity motor function. have.

Therefore, the recovery of motor function usually starts from the proximal part (shoulder joint in the upper limb), so the motor function of the proximal part at the beginning of stroke will have a significant effect on the recovery of distal motor function.

In addition, when looking at the mechanism of recovery of motor function after brain lesion, functional reorganization of the cerebral motor region by the neuroplasticity of the brain is a site in which the cortex or the subcutaneous cortex is damaged adjacent to or far away The hypothesis that it replaces the function of is considered most relevant. (Jang SH, Neurorehabilitation 2007; 22: 253-259)

In addition, Bach-y-Rita (Arch Phys Med Rehabil, 1981) presented the following hypothesis as a mechanism of recovery.

(1) No telephone line connection between Los Angeles and New York

¡Æ the demand for telephone connections between two cities

→ Establish a detour system via another city

→ Call at slow speed

→ training of operators by continual demand (repeatability)

→ Enhancing the efficiency of the bypass system (reorganization)

(2) This hypothesis suggests the importance of active and accurate repetitive motions.

First observational evidence of the effects of exercise therapy: In 1982, Feeney et al., Inoculated with saline, amphetamine, and haloperidol in rats, divided into three groups after brain lesions. When exercise was induced, motor function was improved by amphetamine and inhibited by haloperidol as expected. However, in the case of inhibiting exercise, the promoting effect of the motor function by amphetamine was not observed.

First Neurophysiological Evidence of Exercise Therapy Effects: In 1996, Nudo et al. Investigated brain movement in monkeys with microstimulation in the motor cortex. Compared to the group without exercise, the size of the exercise area was significantly increased in the group without exercise.

(1) Clinical trial: Liepert et al. Conducted a rehabilitation treatment to force stroke patients to use paralyzed hands in their daily lives by restricting the use of the healthy (non-paralytic) hands. As shown in the following figure, it increased significantly.

Taken together, the results reported to date suggest that the following three factors are important to promote proper functional reorganization of the brain (Nudo R et al., Science 1996; Butefisch C et al., J Neurol Sci 1995; Teasell R et al., Can J Neurol Sci. 2006).

(1) Accuracy: Correctness (2) Activeness: Activeness (3) Repeatability: Repetitiveness

Looking at the research trends and problems of rehabilitation treatment method using the above principle, in the case of neuromuscular electrical stimulation (1) it is difficult to perform a precise and sufficient range of motion in complex joints, such as shoulder joints, (2) Unreasonable electrical stimulation causes pain and inhibits the active use of the user. (3) Only EMG-induced electrical stimulation is available in Korea and there is a limitation in applying it to the shoulder joint.

Also, in case of Robot-Assisted Therapy (Kwakkel G, Neural Repair 2008; Krebs HI, IEEE Trans Rehabil Eng. 1998) (1) Actively accurate movement based on the principle of moving the part that cannot be performed by magnetic force by the robot Or (2) the robot is stopped when the patient's intention is lost (when he is unloaded) and the motion is continued even when the patient is not energized during the motion. (3) Although active research is being conducted in the US and Europe for upper extremity exercise, it is not an extensive clinical application stage in Korea and needs improvement efforts for generalization.

Meanwhile, as a conventional patent, Korean Patent No. 0942495 includes a mounting member, a first binding member, and a second binding member, and the mounting member is located on the opposite side of the first portion and the first portion where the thumb is mounted on the outer surface and is detected on the outer surface. It includes a second portion to be mounted integrally. The first binding member secures the thumb to the first portion and the second binding member secures the index finger to the second portion, thereby intentionally restricting the activity of the active body part of the stroke patient through a relatively simple structure, thereby inducing paralysis. Improve motor skills for the site.

In addition, Korean Patent No. 1019952 provides a high-throughput analysis method capable of early diagnosis of stroke expression potential through non-invasive diagnosis through a small amount of blood, predicting stroke expression gene marker SNP, and biochemical marker analysis.

However, the above-mentioned conventional techniques are for general stroke diagnosis or a simple method of improving exercise ability, and there is an urgent need for the development of a new method that can faithfully realize the principle of improving recovery of motor function after stroke.

In order to solve the above problems, in the case of brain lesion patients, spontaneous contraction of the muscles moving the shoulder joint is possible, so that an EMG signal can be generated, and thus an EMG-controlled biofeedback exercise device capable of controlling by an EMG signal is provided. The purpose is to provide.

The present invention induces active movement of a patient by using an exercise device driven by an EMG-controlled method and faithfully realizes the principle of improving the recovery of motor function after a stroke to repeatedly perform sufficient and accurate movement of the shoulder joint. -The purpose is to provide a controlled biofeedback exercise device.

In addition, an object of the present invention is to provide an EMG-controlled biofeedback exercise apparatus that can be implemented early after a stroke to promote patient motivation and thereby promote communication.

The present invention includes a driving unit for driving by using a motor and processing an EMG signal, a control unit for controlling mode setting, an EMG threshold, a speed, and a repetition number, and a monitoring unit for monitoring the control value of the control unit. .

The driving unit includes an EMG module for processing an EMG signal and a driving module including a motor whose speed is controlled by the EMG signal.

The control unit includes a mode setting unit for setting the ON / OFF control mode and the proportional control mode, and a memory for storing the EMG threshold, the speed, and the number of repetitions.

The monitoring unit includes an output module for outputting a graph of mode, speed, memory content, exercise amount, and rehabilitation training results.

In the ON / OFF control mode according to the present invention, the initial setting information including the start position, the end position, and the velocity of the joint motion, and when the active EMG signal is generated, the traction device is operated, and the size of the EMG decreases, which is lower than the threshold. When it stops in place, and when it stops, it consists of the motion control information to perform the step-down deceleration.

Proportional control mode according to the present invention controls the speed of the operation according to the initial setting information including the start position, the end position of the joint motion, and the active EMG signal, step by step acceleration and deceleration is performed, the patient's active It consists of motion control information that can cause

The present invention provides a frame including a chair, a driving unit for driving by using a motor installed in the frame, processing an EMG signal, a control unit for controlling the mode setting, the EMG threshold, the speed, and the number of repetitions, and the drive unit A shoulder flexion / extension unit for controlling the extension of the shoulder and a monitoring unit for monitoring the control value of the control unit.

The control unit controls the initial setting including the start position, the end position, and the velocity of the joint motion in the ON / OFF control mode, and when the active EMG signal is generated, the traction device is operated, and the size of the EMG decreases to below the threshold. When it stops, it stops at that position, and when it stops, the operation control is performed so that the step-down deceleration is performed.

In the proportional control mode, the controller controls an initial setting including a start position and an end position of the joint motion, controls the speed of the operation according to the active EMG signal, and performs the step-by-step acceleration deceleration. Control the operation that can cause the activeness of.

The present invention includes driving a motor through a driving unit, processing an EMG signal, controlling to store a mode setting, an EMG threshold, a speed, and a repetition number through a control unit, and output a control value of the control unit through a monitoring unit. It is configured to include.

According to the present invention, in the ON / OFF control mode, initial setting of the start position, the end position, and the velocity of the joint motion, and when the active EMG signal is generated, operate the traction device, and the size of the EMG becomes smaller than the threshold. When it stops in place, and when stopping, it is configured to further include an operation control step to perform a step-down deceleration.

According to the present invention, in the proportional control mode, an initial setting of a start position and an end position of a joint motion is performed, and an operation control step of controlling an operation speed according to an active EMG signal and performing step-down acceleration deceleration is performed. It is configured to include more.

According to the present invention, by contributing to the improvement of the motor function and performance of daily living operation of the brain lesion patient, the patient or caregiver can be utilized at home, can be used as a commercialized medical device can be treated in the patient's home.

1 is a view schematically showing the overall configuration of the EMG-controlled biofeedback exercise apparatus according to the present invention.
2 is a view showing a product applied to the EMG-controlled biofeedback exercise device according to an embodiment of the present invention.
3 is a view showing an EMG-controlled biofeedback exercise method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the driving unit 10, the control unit 20, and the monitoring unit 30 are largely configured according to an exemplary embodiment of the present invention.

The drive unit 10 is configured to drive by using a motor and to process an EMG signal.

The controller 20 is a device for controlling to store the mode setting, the EMG threshold, the speed, and the number of repetitions. The controller 20 may control the mode setting to be stored in a predetermined memory.

The monitoring unit 30 is a device for monitoring the control value of the control unit 20, a general display device is preferably used.

As shown in FIG. 2, a mechanism specialized for shoulder flexion / extension was implemented to implement the EMG-controlled active motion assist system based on the above-described experimental results.

As shown in FIG. 3, when the EMG-controlled exercise mode (passive, on / off, proportional) implements the apparatus, only the active component is extracted by comparing EMG with a threshold in order to extract exercise will from an EMG signal.

To this end, the ON / OFF control mode as shown in Fig. 3 (a) is a mode for controlling the ON / OFF of the operation by the active EMG signal. (1) The initial setting is the start position, end position, and velocity of the joint motion. (2) Operation control operates the traction device when the active EMG signal is generated, and stops at the place when the EMG becomes smaller than the threshold. When stopping, smooth deceleration is made for the user's convenience and safety. Raised.

As shown in Fig. 3 (b), in the proportional control mode, (1) the initial setting is the start position and the end position of the joint motion, and (2) the motion control increases the speed of motion according to the active EMG signal. In this mode, smooth acceleration and deceleration are performed automatically, and this mode is most likely to cause the patient's activeness.

According to the statistical results of the 2009 death and cause of death, stroke is one of the three leading causes of death in Korea along with malignant neoplasms and heart disease. In 2009, stroke had a prevalence of 3.3% for people over 50. In particular, due to the high incidence in the elderly population, the elderly population is expected to increase rapidly with aging in Korea.

Currently, there is no biofeedback system using EMG signals for stroke patients, and when the technology is commercialized, the expected price is about 7 million won, and it may be helpful to treat patients on behalf of insufficient rehabilitation therapists. .

The present invention biofeedback control technology is applicable as a rehabilitation and orthopedic exercise device for various joints of the human body.

10:
20:
30: monitoring unit

Claims (12)

A driving unit which drives by using a motor and processes an EMG signal;
A control unit controlling to store the mode setting, the EMG threshold, the speed, and the number of repetitions;
A monitoring unit monitoring a control value of the control unit;
, ≪ / RTI >
The control unit,
A mode setting unit for setting an ON / OFF control mode and a proportional control mode;
A memory that stores the EMG threshold, speed, and number of repetitions;
EMG-controlled biofeedback exercise apparatus comprising a. delete delete The method of claim 1,
The monitoring unit,
An output module for outputting a graph of mode, speed, memory content, exercise amount, and rehabilitation training results;
EMG-controlled biofeedback exercise apparatus comprising a. The method of claim 1,
The on / off control mode,
Initial setting information including a start position, an end position, and a velocity of the joint motion;
Operation control information for operating the traction device when an active EMG signal is generated, stopping the position when the EMG becomes smaller than the threshold, and when deactivating, stepwise deceleration is performed;
EMG-controlled biofeedback exercise device, characterized in that consisting of. The method of claim 1,
The proportional control mode is,
Initial setting information including a start position and an end position of the joint motion;
Motion control information for controlling the speed of the motion according to the active EMG signal, causing the step-down acceleration and deceleration to be performed, and causing the patient to be active;
EMG-controlled biofeedback exercise device, characterized in that consisting of. A frame comprising a chair;
A driving unit which drives by using a motor installed in the frame and processes an EMG signal;
A controller for controlling the mode setting, the EMG threshold, the speed, and the number of repetitions;
A shoulder flexion / extension for controlling the flexion of the shoulder by the driving unit;
A monitoring unit monitoring a control value of the control unit;
, ≪ / RTI >
In the case of the ON / OFF control mode,
Control the initial settings including the start position, end position, and velocity of the joint movement,
EMG-controlled biofeedback characterized in that the traction device is operated when an active EMG signal is generated, and the motion control is performed to stop at the position when the EMG decreases below the threshold, and to perform step-by-step deceleration when it stops. Exercise equipment. delete The method of claim 7, wherein
The control unit in the proportional control mode,
Control the initial setting including the start position and end position of the joint movement,
EMG-controlled biofeedback exercise apparatus, characterized in that for controlling the speed of the operation in accordance with the active EMG signal, the step-by-step acceleration and deceleration is performed to control the operation that can cause the patient's activity. Driving a motor through a driving unit and processing an EMG signal;
Controlling to store the mode setting, the EMG threshold, the speed, and the number of repetitions through the control unit;
Outputting a control value of the control unit through a monitoring unit;
, ≪ / RTI >
In the ON / OFF control mode,
Initial setting the start position, the end position, and the velocity of the joint motion;
An operation control step of operating the traction device when an active EMG signal is generated, stopping the position when the EMG becomes smaller than the threshold, and when deactivating, stepwise deceleration is performed;
EMG-controlled biofeedback exercise method characterized in that it further comprises. delete The method of claim 10,
In proportional control mode,
Initial setting the start position and the end position of the joint motion;
An operation control step of controlling the speed of the operation according to the active EMG signal and performing step-down acceleration deceleration;
EMG-controlled biofeedback exercise method characterized in that it further comprises.

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