Surface EMG - is a non-invasive, easy-to-use neuromuscular function test

Surface EMG - is a non-invasive, easy-to-use neuromuscular function test

Surface EMG - is a non-invasive, easy-to-use method for the examination of neuromuscular function. It is also called dynamic electromyography because it does not affect the receptor position or posture. The surface EMG is non-invasive, simple to operate, and easy to accept. At present, surface electromyography has been widely used in neuromuscular function tests in sports medicine, rehabilitation medicine, spinal surgery, etc., and has important value in the diagnosis and treatment of related diseases.

Surface electromyography analysis of paraspinal muscles in patients with lumbar disc herniation after single-segment lumbar disc herniation

Article highlights:

1 The article systematically summarizes the clinical value of electromyography in evaluating the function of paravertebral muscles and the therapeutic effect of lumbar disc herniation, and innovatively applies the contraction recruitment potential to evaluate the paraspinal muscle strength.

2 This article is based on the common population of patients with lumbar disc herniation and lumbar scoliosis. The causes, mechanisms and special clinical features of lumbar disc herniation secondary to lumbar scoliosis are explored. The paravertebral muscles are maintained in the patient's spinal crown. It plays an important role in surface balance.

3 Inadequacies of the test: 1 Surface EMG can not specifically assess the muscle strength of a certain muscle, only a rough evaluation of the overall muscle strength of the paravertebral muscle, the accuracy is worse than the needle electromyogram. 2 Because lumbar scoliosis in patients with lumbar disc herniation begins at the protruding segment, only the paraspinal muscle strength on both sides of the protruding segment is evaluated. 3 The number of samples is small, and the next step is to increase the sample size.

Summary

Background:

The electromyography of the paravertebral muscles in patients with congenital and idiopathic scoliosis has been extensively studied, and there are few studies on the electromyography of the paravertebral muscles in patients with lumbar disc herniation secondary to lumbar scoliosis.

通过应用表面肌电图技术分析腰椎间盘 

Purpose:

The surface electromyography technique was used to analyze the myoelectric activity of the paraspinal muscles in patients with lumbar disc herniation secondary to lumbar scoliosis. The muscle strength of both sides was evaluated, and the special clinical features of lumbar scoliosis were revealed and the mechanism of its development was explored.

Method:

Retrospective analysis of 26 cases of adult patients with lumbar disc herniation secondary to lumbar scoliosis from July 2012 to July 2014 were performed in lumbar intervertebral foramen. Before and after treatment, the full spine was placed in the lateral position . The Cobb angle of the lumbar scoliosis and the offset distance of the trunk were measured. The surface electromyography was performed. The value of the trapezoidal recruitment potential of the paraspinal muscles was measured, and the bilateral levels of the lumbar disc herniation were evaluated. Paravertebral muscle strength.

Results and conclusions:

After treatment, lumbar scoliosis was significantly reduced in all patients, and the balance of the coronal plane of the spine was restored. The Cobb angle of the lumbar scoliosis was (11.81±3.50)° before treatment and (2.65±3.10)° after treatment. The lumbar scoliosis was significantly reduced, and the mean difference was (9.15±2.84)°. The difference was significant (P < 0.05). The preoperative torso offset distance was (5.92±3.20) cm, (0.32±0.26) cm after treatment, and the mean difference was (5.59±3.08) cm. The difference was significant (P < 0.05). Pain was significantly relieved after treatment (P < 0.05). The Oswestry dysfunction index averaged 78% before treatment and 4% after treatment. At the level of the prominent segment, the concave contraction potential was (0.21±0.12) mV when the concave side was flexed, and (0.88±0.26) mV after the treatment. The mean difference was (0.59±0.27) mV. The time of recruitment at the convex side was (0.29±0.12) mV, and after treatment was (0.88±0.25) mV, the mean difference was (0.67±0.27) mV, the difference was significant (P < 0.05); after treatment The mean difference between the strongly contracted recruitment potentials on both sides was (0.003±0.020) mV, and the difference was not significant (P > 0.05). All patients were followed up for at least 1 year without complications and no recurrence of lumbar disc herniation. The above results indicate that lumbar scoliosis caused by lumbar disc herniation is compensatory scoliosis, and early lumbar intervertebral discectomy can correct lumbar scoliosis. Paravertebral muscle strength plays an important role in maintaining the balance of the lumbar coronal plane.

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