WAVELET ANALYSIS OF LOW BACK SURFACE EMG SIGNALS SUBJECT TO UNEXPECTED LOAD

2004 ◽  
Vol 04 (03) ◽  
pp. 389-400 ◽  
Author(s):  
M. H. POPE ◽  
N. D. PANAGIOTACOPULOS ◽  
W. STIELAU ◽  
K. FRIESEN ◽  
J. S. LEE
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Reaction Time ◽  
Chronic Low Back Pain ◽  
Erector Spinae ◽  
Back Surface ◽  
Initial Reaction ◽  
Clinical Test ◽  
Low Back ◽  
Normal Subject

This study reports a new technique for the analysis of electromyographic signals from the low back muscles. More specifically, the effect of unexpected load on a normal subject and a subject with chronic low back pain was determined and quantified using wavelet based analysis (Morlet wavelet). The analysis was performed using a Wavelet software system, subsequently referred to as PSCW. The system identified automatically, accurately, and in a uniquely reproducible manner the time response of the erector spinae muscle. The exact number of responses as well as their corresponding time and amplitude were determined and tabulated. It was observed that the initial reaction time for the normal subject was faster than the reaction time for the subject chronic low back pain. The importance of this observation may help in the understanding of the physiology of the neuromuscular system associated with low back spine disorders. It is believed that an occupational and clinical test based on this observation that could give an accurate assessment of the status of low back disorder could be designed. Based on this assessment a rehabilitation program could be developed with the objective of improving the condition of a spine disorder (decrease the initial response time) by muscle strengthening.

scholarly journals The cognitive impact of chronic low back pain: Positive effect of multidisciplinary pain therapy

2017 ◽  
Vol 17 (1) ◽  
pp. 273-278 ◽  
Author(s):  
Marcus Schiltenwolf ◽  
Michael Akbar ◽  
Eva Neubauer ◽  
Simone Gantz ◽  
Herta Flor ◽  
...  
Keyword(s):  
Working Memory ◽  
Low Back Pain ◽  
Back Pain ◽  
Reaction Time ◽  
Cognitive Function ◽  
Recognition Memory ◽  
Chronic Low Back Pain ◽  
Visual Memory ◽  
Low Back ◽  
Adult Intelligence Scale

AbstractObjectivesLittle is known about the affected cognitive problems in chronic low back pain patients. For this patient cohort research mostly focused on memory of pain, rather than cognitive difficulties related to pain. Chronic pain may be associated with specific (yet undefined) cognitive deficits that affect everyday behaviour. We set out to compare the cognitive function of patients with chronic low back pain (cLBP) in the course of multidisciplinary pain treatments before and after therapy.MethodsThirty-three patients with cLBP and 25 healthy controls between 20 and 70 years were recruited into the study. The inclusion criteria for patients were: (1) a history of at least 12 weeks of chronic myofascial low back pain without radicular pain sensation before enrolment; (2) grade II and higher chronicity according to von Korff; (3) no opioid medication. The patients recruited had a mean pain duration of 7.13 ± 7.16 years and reported a mean pain intensity of 6.62 ± 2.04 (visual analogue score, VAS). Their mean back function according to the Funktionsfragebogen Hannover (FFbH, a questionnaire comparable with the Health Assessment Questionnaire) was 52.39 ± 20.23%.At three time points (before therapy, 3 weeks and 6 months after therapy) the study subjects were assessed prospectively with a battery of visual memory tests from the Cambridge Neuropsychological Test Automated Battery (CANTAB). These included choice reaction time (CRT), pattern recognition memory (PRM) and spatial span (SSP). In parallel, the Trail-Making Test (TMT-A, TMT-B) and the Wechsler Adult Intelligence Scale (WAIS-III) were used to evaluate intelligence and cognitive flexibility.ResultsAt the beginning of MDPT (T1), it took patients with cLBP significantly longer than HC to complete TMT-A (38.29 ± 19.99 s vs 30.25 ± 14.19 s, p = 0.047) and TMT-B (72.10 ± 26.98 s vs 55.99 ± 22.14 s, p = 0.034). There were no significant differences between patients and HC in CRT, PRM and SSP. Three weeks (T2) and 6 months (T3) after MDPT, TMT-A reaction time of patients significantly improved by 6.5 s and 8.1 ms (38.3 ±19.9 s vs 31.8 ±12.3 s, p = 0.02 and 31.8 ± 12.3 s vs 30.2 ± 8.9 s, p = 0.021, respectively). The patients’ working memory was also better 6 months after MDPT (48.8 ± 11.1% at T1, 51.2 ±11.9% at T2, 57.1 ±10.9% at T3, p = 0.008). Significant correlations among pain, depression/anxiety, medication and neuropsychological tests were found.ConclusionsThese findings show that patients with cLBP have slowed speeds of information processing and working memory, but no alteration in attention and recognition memory. There are clearly interactions of cognitive function with pain, depression, anxiety, and medication. MDPT may improve the impaired cognitive function of patients with cLBP.ImplicationHealth professionals should contemplate the results from this study when planning therapy strategies especially when prescribing pain medications such opioids to patients with chronic low back pain.

scholarly journals Effects of Whole Body Vibration exercise on Lumbar-Abdominal Muscles Activation for patients with chronic low back pain

2020 ◽  
Author(s):  
yulin dong ◽  
huifang wang ◽  
Yan Zhu ◽  
Binlin Chen ◽  
Yili Zheng ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Muscle Activity ◽  
Whole Body Vibration ◽  
Abdominal Muscle ◽  
Erector Spinae ◽  
Whole Body ◽  
Low Back ◽  
Body Vibration

Abstract BackgroundWhole body vibration (WBV) training as an intervention method can cure chronic low back pain (CLBP). Different WBV parameters exert different effects on lumbar-abdominal muscle performance. Currently, there is a lack of study researched the influence of WBV training on patients with CLBP by lumbar–abdominal muscle activity. Therefore, this study aimed to investigate how WBV and exercise and their interactions influence lumbar-abdominal muscle activity in patients with CLBP.Methodsa group of ambulatory patients with chronic low back pain. Muscle activities of the multifidus, erector spinae, abdominal oblique externus muscle and the rectus abdominis muscle were measured by surface electromyography, whereas participants performed 4 different exercises during three whole body vibration conditions and a no-vibration condition in a single experimental session.ResultsCompared with the same exercises without whole body vibration, muscle activity increased when whole body vibration was added to the exercises. The frequency and exercise presented significant effects on the root mean square of multifidus, whereas exercise and frequency also resulted in significant interaction effects.ConclusionAdding whole body vibration to exercise could increase muscle activation of lumbar–abdominal muscle in patients with CLBP. The optimum frequency for lumbar–abdominal muscles is 15 Hz. The best exercises include plank for multifidus and erector spinae, V crunch for rectus abdominis and single bridge for abdominal oblique externus.Trial registration:ChiCTR-TRC-13003708. Registered 19 October 2013, http://www.chictr.org.cn/showproj.aspx?proj=5852

Electrophysiological Function of the Lumbar Multifidus and Erector Spinae Muscles in Elderly Patients With Chronic Low Back Pain

2019 ◽  
Vol 32 (1) ◽  
pp. E13-E19
Author(s):  
Yoshihito Sakai ◽  
Hiroki Matsui ◽  
Sadayuki Ito ◽  
Tetsuro Hida ◽  
Kenyu Ito ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Elderly Patients ◽  
Chronic Low Back Pain ◽  
Erector Spinae ◽  
Low Back ◽  
Lumbar Multifidus

scholarly journals Reliability of the endurance test for the erector spinae muscle

2016 ◽  
Vol 29 (2) ◽  
pp. 369-375 ◽  
Author(s):  
Cíntia Pereira de Souza ◽  
Renato Sobral Monteiro-Junior ◽  
Elirez Bezerra da Silva
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Erector Spinae ◽  
Muscle Endurance ◽  
Low Back ◽  
Endurance Test ◽  
Erector Spinae Muscle ◽  
Standard Error Of Measurement ◽  
Sedentary Women

Abstract Introduction: The low resistance of the erector spinae has been seen as a risk factor for developing chronic low back pain. The test of the erector spinae muscle endurance advocated by Biering-Sorensen has been used to assess the strength of the erector spinae muscle. Modifications of the measuring instrument require reliability studies. Objective: To evaluate the measurement of the erector spinae muscle endurance and the standard error of measurement (SEM) of the modified Biering-Sorensen test of erector spinae in women with chronic low back pain. Methods: Forty-eight sedentary women, aged 52 ±7, suffering from chronic low back pain, were tested. The position adopted was the prone position without the trunk on the examining table. Fixations were performed with straps at the ankles, knees and pelvis. The patient was instructed to maintain the shoulder blades in contact with the stadiometer as long as possible. The measurement was repeated, with measures 15 minutes apart. Results: Considering the confidence limits of Bland & Altman, - 40 and 68 seconds, the SEM was13 seconds and SEM% was 22. The ICC = 0.87 with p = 0.001. The first test was equal to 54 ± 36 seconds, and the retest = 67 ± 40 seconds. Conclusion: The endurance test of the erector spinae showed moderate reliability. Therefore, we suggest that, despite its applicability in clinical practice, the results should be interpreted carefully because the differences in mean erector spinae endurance of up to 13 seconds may be related to measurement error.

Electromyographic activity of the erector spinae: The short-effect of one workday for welders with nonspecific chronic low back pain, an observational study

2018 ◽  
Vol 31 (1) ◽  
pp. 147-154 ◽  
Author(s):  
André Augusto M.T. Mendes ◽  
Sandra Maria Sbeghen Ferreira de Freitas ◽  
César Ferreira Amorin ◽  
Cristina Maria Nunes Cabral ◽  
Rosimeire Simprini Padula
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Observational Study ◽  
Chronic Low Back Pain ◽  
Erector Spinae ◽  
Electromyographic Activity ◽  
Low Back

Biopsy samples from the erector spinae of persons with nonspecific chronic low back pain display a decrease in glycolytic muscle fibers

2020 ◽  
Vol 20 (2) ◽  
pp. 199-206 ◽  
Author(s):  
Anouk Agten ◽  
Sjoerd Stevens ◽  
Jonas Verbrugghe ◽  
Annick Timmermans ◽  
Frank Vandenabeele
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Muscle Fibers ◽  
Erector Spinae ◽  
Low Back

Strength and Flexibility Characteristics of Athletes with Chronic Low-Back Pain

1996 ◽  
Vol 5 (4) ◽  
pp. 275-286 ◽  
Author(s):  
Kathleen J. Ashmen ◽  
C. Buz Swanik ◽  
Scott M. Lephart
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Erector Spinae ◽  
Control Group ◽  
Low Back ◽  
Leg Length ◽  
Mean Differences ◽  
Division I Athletes ◽  
Abdominal Strength

The purpose of this study was to identify strength and flexibility deficits in subjects with chronic low-back pain (CLBP). Subjects were 16 female Division I athletes: 8 athletes who had experienced CLBP for at least 6 months prior to testing and a control group of 8 matched subjects. Athletes with neurological symptoms, previous back operations, and leg length discrepancies and those who were diagnosed with scoliosis, spondylolisthesis, or spondylolysis were excluded from this study. Variables assessed included abdominal strength, erector spinae endurance, hip flexion and extension endurance, torso lateral flexibility, and low-back flexibility. Strength and endurance were calculated as a function of time in seconds. Goniometric measurements were used to determine flexibility. Significant mean differences were found by using dependentttests for abdominal strength, erector Spinae endurance, hip extension, and right lateral flexion of the torso. The results validate the necessity for pelvic stabilization and indicate that strength and flexibility deficits vary among populations.

Non-thrust manual therapy reduces erector spinae short-latency stretch reflex asymmetries in patients with chronic low back pain

2012 ◽  
Vol 22 (5) ◽  
pp. 663-669 ◽  
Author(s):  
David A. Goss ◽  
James S. Thomas ◽  
Stevan Walkowski ◽  
Shawn C. Clark ◽  
John C. Licciardone ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Manual Therapy ◽  
Chronic Low Back Pain ◽  
Stretch Reflex ◽  
Short Latency ◽  
Erector Spinae ◽  
Low Back

scholarly journals Effect of Direct Vibration on the Activity of Deep Trunk Muscles of Patients with Non-specific Chronic Low Back Pain

2021 ◽  
Author(s):  
Nackhwan Kim ◽  
Soo Hoon Yoon ◽  
Minhee Kim ◽  
Sang-heon Lee ◽  
Dong Hee Kim ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Exercise Group ◽  
Erector Spinae ◽  
Transversus Abdominis ◽  
Trunk Muscles ◽  
Low Back ◽  
Stabilization Exercise ◽  
Direct Vibration

Abstract Background: We used two methods, direct and indirect, to study the application of vibration training. This pilot study aimed to investigate the short-term effect of direct vibration and spinal stabilization exercises on the deep trunk muscles of patients with non-specific chronic low back pain (CLBP). Methods: Sixty-two participants with non-specific CLBP were randomly placed into two groups, one with direct vibration to the trunk muscles, VSE (vibration-plus stabilization exercise) group, and one without, CSE (conventional stabilization exercise) group. The groups underwent twelve sessions of an exercise program for spinal stability. We measured the thickness and activity of the following trunk muscles using ultrasonography and surface electromyography (sEMG): transversus abdominis (TrA), external oblique (EO), internal oblique (IO), rectus abdominis (RA), lumbar multifidus (LM), and lumbar erector spinae (LES). Results: The ultrasonographic examination revealed that the ratio of muscle thickness to muscle contraction and relaxation was increased after training in the TrA and LM muscles of patients in the CSE group, and in the TrA, LM, and IO muscles in the VSE group. We also found that the LM/LES ratio in the CSE group and the IO/RA, TrA/RA, and LM/LES ratios in the VSE group were significantly increased. Using multiple regression analysis, we showed that the improvement of the symptoms was related to increased activity of the deep trunk muscles in the VSE group (p<0.05).Conclusion: The findings suggest that direct vibration on the trunk muscles may increase the activity of contracting deep muscles and be used in addition to the effective enhancement of stabilization exercise in patients with non-specific CLBP.Trial registration: KCT0003858. Registered 26 April 2019.

scholarly journals MRI Assessment of Degeneration of Multifidus and Erector Spinae Muscles in Patients with Chronic Low Back Pain

2021 ◽  
Author(s):  
Alikemal Yazici ◽  
Tuba Yerlikaya ◽  
Adile Oniz
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Erector Spinae ◽  
Low Back ◽  
Cross Sectional ◽  
Fat Infiltration ◽  
Significant Difference ◽  
Healthy Control ◽  
The Right

Abstract Background The aim of this study was to examine degeneration in the lumbar musculus multifidus (L.MF) and lumbar musculus erector spina (L.ES) muscles in patients with mechanical chronic low back pain, non-radiculopathy chronic low back pain with discopathy, and healthy individuals. The relationships with low back pain were examined by comparing the results according to gender, pain, and lumbar segments. Material and Method: Evaluation was made of 36 healthy control subjects (Group 1), 37 patients with mechanical low back pain (Group 2) and 41 non-radiculopathy, lumbar discopathy patients (Group 3). On axial magnetic resonance images at the L3-S1 level, asymmetry between the left and right sides was examined in respect of L.MF and L.ES surface cross-sectional areas (CSA), total surface cross-sectional area (TCSA = L.MF + L.ES), and fat infiltration. Results The mean CSA values showed a significant difference only in the right L.MF in the healthy control group (p = 0.011). No statistically significant difference was seen between the groups in the comparisons of TCSA, and a statistically significant difference was determined in respect of fat infiltration in the right and left L.MF and the left L.ES (p = 0.011, p = 0.001, p = 0.027, respectively). When the CSA and TCSA were examined according to gender within the groups, the values were found to be statistically significantly higher in males (p < 0.001). The CSA and TCSA values of the L.MF and L.ES showed a significant difference between segments (L3-L4, L4-L5, L5-S1) (p < 0.001). No asymmetry was observed between the left /right CSA and TCSA values of the groups. Fat infiltration showed a significant difference according to gender and segments (p < 0.001). Conclusion Fat infiltration in the L.MF muscle is related to mechanical low back pain and lumbar discopathy. That there was no difference between the groups in the CSA and TCSA values demonstrates the need for measurement of muscle atrophy associated with fat infiltration or functional cross-section area rather than CSA and TCSA.

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