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Effect of laser treatment on postural control parameters in patients with chronic nonspecific low back pain: a randomized placebo-controlled trial.

ABSTRACT: The management of nonspecific lumbar pain (NSLP) using laser irradiation remains controversial. A systematic review of recently published studies indicates that the effects of laser therapy are commonly assessed using only imperfect methods in terms of measurement error. The main objective of this study was to assess static postural stability using an objective tool in patients with chronic NSLP after laser irradiation at different doses and wavelengths. In total, 68 patients were included in the laser sessions and were randomly assigned into four groups: high-intensity laser therapy at 1064 nm and 60 J/cm2 for 10 min (HILT), sham (HILT placebo), low-level laser therapy at 785 nm and 8 J/cm2 for 8 min (LLLT), and sham (LLLT placebo). In addition, all patients were supplemented with physical exercises (standard stabilization training). To assess postural stability, a double-plate stabilometric platform was used. All measurements were performed pre- and post-laser sessions (three weeks) and at follow-up time points (one and three months). Laser procedures led to more balanced posture stability in patients, although these positive changes were significant mainly for short-term observation (after 4-week therapy). In the follow-up analysis, the parameters were gradually impaired. Kruskal-Wallis analysis of variance (ANOVA) for independent variables did not show any difference between the studied groups. Low- and high-intensity laser therapy does not lead to a significant improvement in postural sway in patients with NSLP compared with standard stabilization training based on short- and long-term observations.

SUBMITTER: Taradaj J

PROVIDER: S-EPMC6886387 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Effect of laser treatment on postural control parameters in patients with chronic nonspecific low back pain: a randomized placebo-controlled trial.

Taradaj J J Rajfur K K Rajfur J J Ptaszkowski K K Ptaszkowska L L Sopel M M Rosińczuk J J Dymarek R R

Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas 20191125 12

The management of nonspecific lumbar pain (NSLP) using laser irradiation remains controversial. A systematic review of recently published studies indicates that the effects of laser therapy are commonly assessed using only imperfect methods in terms of measurement error. The main objective of this study was to assess static postural stability using an objective tool in patients with chronic NSLP after laser irradiation at different doses and wavelengths. In total, 68 patients were included in th ...[more]

PMID: 31778436

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Project description:Chronic low back pain (CLBP) is associated with postural control impairments and is highly prevalent in elderly people. The objective of this study is to verify whether anticipatory postural adjustments (APAs) and compensatory postural adjustments (CPAs) are affected by CLBP in elderly people by assessing their postural control during a self-initiated perturbation paradigm induced by rapid upper arm movement when pointing to a target. The participants' lower limb muscle onset and center of pressure (COP) displacements were assessed prior to perturbation and throughout the entire movement. T0 moment (i.e., the beginning of the movement) was defined as the anterior deltoid (DEL) onset, and all parameters were calculated with respect to it. The rectus femoris (RT), semitendinosus (ST), and soleous (SOL) showed delayed onset in the CLBP group compared with the control group: RF (control: - 0.094 ± 0.017 s; CLBP: - 0.026 ± 0.012 s, t = 12, p < 0.0001); ST (control: - 0.093 ± 0.013 s; CLBP: - 0.018 ± 0.019 s, t = 12, p < 0.0001); and SOL (control: - 0.086 ± 0.018 s; CLBP: - 0.029 ± 0.015 s, t = 8.98, p < 0.0001). In addition, COP displacement was delayed in the CLBP group (control: - 0.035 ± 0.021 s; CLBP: - 0.015 ± 0.009 s, t = 3; p = 0.003) and presented a smaller amplitude during APA COPAPA [control: 0.444 cm (0.187; 0.648); CLBP: 0.228 cm (0.096; 0.310), U = 53, p = 0.012]. The CLBP group required a longer time to reach the maximum displacement after the perturbation (control: 0.211 ± 0.047 s; CLBP 0.296 ± 0.078 s, t = 3.582, p = 0.0013). This indicates that CLBP elderly patients have impairments to recover their postural control and less efficient anticipatory adjustments during the compensatory phase. Our results suggest that people with CLBP have altered feedforward hip and ankle muscle control, as shown from the SOL, ST, and RT muscle onset. This study is the first study in the field of aging that investigates the postural adjustments of an elderly population with CLBP. Clinical assessment of this population should consider postural stability as part of a rehabilitation program.

Project description:BACKGROUND:According to the American Physical Therapy Association, there is strong evidence to show that vertebral mobilization and manipulation procedures can be used to improve spinal and hip mobility and reduce pain and incapacity in low back pain patients that fit the clinical prediction rule. OBJECTIVES:To evaluate the immediate effects of high-velocity low-amplitude (HVLA) manipulation on pain and postural control parameters in individuals with nonspecific low back pain. METHODS:This study used a participant-blinded and assessor-blinded randomized controlled clinical trial involving a single session, in which 24 participants were randomly distributed into control (simulated manipulation) and intervention (HVLA lumbar manipulation) groups. The primary (pain: subjective pain intensity and pressure pain threshold) and secondary outcomes (postural control: ellipse area, center of pressure [COP] excursion, COP RMS velocity, and differences between the COP and center of projected gravity) were evaluated before and after the session using a numerical pain scale, algometer, and a force platform. For all outcomes, multiple mixed 2 (group) × 2 (time) ANOVAs were performed. RESULTS:For the subjective pain intensity, only time was significant as a main effect, where pre-intervention presented a greater value then post-intervention (F [1.44]?=?4.377; p =?0.042; r =?0.30). For the pressure pain threshold no significant effect was found. For the postural control parameters, as a main effect, only the ellipse area was significantly greater in the control group (F [1.44]?=?6.760; p =?0.013; effect size?=?0.36). CONCLUSIONS:There was a reduction in subjective pain intensity, evaluated using a numerical scale, in both the intervention and control groups immediately after the intervention, suggesting that the spinal manipulation had a similar effect to the placebo procedure. No effect of HVLA lumbar manipulation was identified for postural control variables in either the intervention or control groups. TRIAL REGISTRATION:The study was registered at ClinicalTrials.gov under the number NCT02312778, registered at 14 September 2014.

Project description:BackgroundAmong the most effective therapeutic interventions in non-specific chronic low back pain, clinical practice guidelines highlight exercise therapy and patient education. However, the variability in the type of exercise and its dosage means that there is no clear evidence regarding the most optimal form of therapeutic exercise.AimThe main objective of this study was to ascertain the effects produced by two different exercise interventions (supervised exercise therapy and laser-guided exercise therapy) and pain neuroscience education on postural control measured by the displacement center of pressure (CoP) and energy spectral density (ESD) in subjects with non-specific chronic low back pain.DesignThis is a single-blinded randomized clinical comparative controlled trial.SettingThe study was carried out in different private physiotherapy care centers.PopulationWe enrolled 60 subjects with non-specific chronic low back pain of at least 3-month duration, aged 18-45 years.MethodsBoth groups performed a total of 16 therapeutic exercise sessions and 8 pain neuroscience education sessions, with the laser-guided exercise therapy group performing laser-guided exercises. The main outcome measures evaluated were ESD and displacement of CoP measured at 3 different times (baseline, post-treatment, and 3 month follow-up).ResultsThe most important differences for ESD and displacement of CoP variables were obtained for eyes open, unstable surface anteroposterior axis (F(2,92)=7.36, P=0.001, d=0.71) and eyes closed, stable surface mediolateral axis (F(2,92)=3.24, P<0.001, d=0.76). Further, time × group interactions showed significant statistical differences in both cases as well as significant differences between baseline and 3 month's follow-up.ConclusionsBoth exercise modalities (supervised exercise therapy and laser-guided exercise therapy) showed changes in variables related to postural control (displacement of CoP and ESD). However, the laser-guided exercise therapy program showed greater improvements in ESD.Clinical rehabilitation impactAnalysis of a new approach for the quantification of data obtained from postural control assessment relying on widely used devices (accelerometers and pressure platforms).

Project description:Background:Researchers are highly interested in the study of nonspecific low back pain (NSLBP). However, few have attempted to collect global data, analyze the emerging trends, and conduct reviews from the perspectives of visualization and bibliometrics. Purpose:We aimed to evaluate research situation and capture subsequent developmental dynamics regarding NSLBP via CiteSpace. Methods:Publications on NSLBP in recent 19 years were retrieved from the Web of Science Core Collection (WoSCC). We used CiteSpace to analyze publication outputs, document types, countries, institutions, journals, authors, references, and keywords. Knowledge foundation, hot topics, and future direction were then stated. Results:A total of 1099 papers were collected, and the trend of annual publications maintained growth with small fluctuations. Australia (188) and the University of Sydney (76) were the most prolific country and institution, respectively. The Netherlands (0.84) and the University of Sydney (0.47) had the maximum centrality, thus indicating that they have importance in this field. The journal Spine (publication: 87, cocitation counts: 942) ranked first in terms of the volume of publications and cocitation counts. Maher CG (52) who published the most papers and Waddell G (286) who was cited most frequently were the leading authors, thus making strong academic influences. "Motor control exercise" was the largest cluster, which contained most related research articles. 14 references with the strongest citation counts were cited until 2018, thus implying the future development trend. Current hotspots were treatment, meta-analysis, method, and risk factors. Spine, efficacy, adult, and meta-analysis can be regarded as research frontiers. Conclusion:This study offers insights into the trend of NSLBP to determine major research countries and institutions, core journals, pivotal authors, overall development tendency, hot topics, and research frontiers. Moreover, it will help researchers extract hidden valuable information for further study.

Dataset Information

Effect of laser treatment on postural control parameters in patients with chronic nonspecific low back pain: a randomized placebo-controlled trial.

Publications

Effect of laser treatment on postural control parameters in patients with chronic nonspecific low back pain: a randomized placebo-controlled trial.

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