The Potential Relationship Between a Cognitive Dissonance State and Musculoskeletal Injury: A Systematic Review

OBJECTIVE

The objective of this systematic review was to investigate the potential link between cognitive dissonance or its related constructs (emotional dissonance, emotional labor) and musculoskeletal disorders.

BACKGROUND

The etiology of musculoskeletal disorders is complex, as pain arises from complex interactions among physical, social, and psychological stressors. It is possible that the psychological factor of cognitive dissonance may contribute to the etiology and/or maintenance of musculoskeletal disorders.

METHOD

MEDLINE, APA PsycInfo, and CINAHL Plus databases were searched for studies investigating cognitive dissonance or its related constructs as exposure(s) of interest and outcomes related to physical health (including, but not limited to, musculoskeletal pain). Risk of bias was assessed using the Appraisal tool for Cross-Sectional Studies (AXIS) tool.

RESULTS

The literature search yielded 7 studies eligible for inclusion. None of the included studies investigated cognitive dissonance directly but instead investigated dissonance-related constructs of emotional dissonance and emotional labor, in which a mismatch between required and felt emotions might elicit a psychological response consistent with the cognitive dissonance state. Moderate effect sizes between dissonance-related constructs and musculoskeletal disorders were noted (OR 1.25-2.22).

CONCLUSION

There is likely a relationship between the two factors studied. However, as the included studies were cross-sectional in nature, a causal relationship between cognitive dissonance-related constructs and musculoskeletal disorders cannot be inferred. Therefore, future study proposing and validating a causal pathway between these variables is warranted.

APPLICATION

Cognitive dissonance and its related constructs may serve as risk factors for musculoskeletal disorders that have not been considered previously.

Cognitive dissonance increases spine loading in the neck and low back

Cognitive dissonance refers to a state where two psychologically inconsistent thoughts, behaviours, or attitudes are held at the same time. The objective of this study was to explore the potential role of cognitive dissonance in biomechanical loading in the low back and neck. Seventeen participants underwent a laboratory experiment involving a precision lowering task. To establish a cognitive dissonance state (CDS), study participants were provided negative feedback on their performance running counter to a pre-established expectation that their performance was excellent. Dependent measures of interest were spinal loads in the cervical and lumbar spines, calculated via two electromyography-driven models. The CDS was associated with increases to peak spinal loads in the neck (11.1%, p < .05) and low back (2.2%, p < .05). A greater CDS magnitude was also associated with a greater spinal loading increase. Therefore, cognitive dissonance may represent a risk factor for low back/neck pain that has not been previously identified.Practitioner summary: Upon establishing a cognitive dissonance state in a group of participants, spinal loading in the cervical and lumbar spines were increased proportional to the magnitude of the cognitive dissonance reported. Therefore, cognitive dissonance may represent a risk factor for low back and neck pain that has not been previously identified.

Assessing changes in range of motion in adolescent patients undergoing myoActivation® for chronic pain related to myofascial dysfunction: a feasibility study

Introduction

myoActivation® assessment utilizes systemized movement tests to assess for pain and limitations in motion secondary to myofascial dysfunction. myoActivation needling therapy resolves the myofascial components of pain and is associated with immediately observed changes in pain, flexibility, and range of motion. The principal aim of this feasibility study was to objectively characterize the kinematic metrics of upper and lower body motion before and after myoActivation movement tests and therapy.

Methods

Five consecutive eligible adolescent participants considered appropriate for myoActivation were consented to receive their myoActivation intervention in a motion laboratory. Clinical motion analysis was used to measure the changes in maximum range of motion (maxROM) and maximum angular speed to maximum ROM (speedROM) of movement tests predicted to change. Metrics were analyzed to assess changes over specified time intervals - i) baseline to after initial myoActivation session, and ii) baseline to after complete myoActivation course. Each participant served as their own control.

Results

We demonstrated objective evidence of improved maxROM and/or speedROM in 63% of the movement tests predicted to change after just one session of myoActivation and in 77% of movement tests predicted to change over the complete course of treatment. The myoActivation clinician observed positive change in 11/19 of movement tests across all patients, that were predicted to change after the initial myoActivation session; 81% of these positive changes were confirmed by the kinematic data.

Discussion

Clinical motion analysis provides objective support to clinicians evaluating, treating, and teaching myofascial release. A larger, prospective clinical trial is warranted to explore the impact of myoActivation on movement. Refinement of observation techniques and outcome measures established in this feasibility study will strengthen future clinical motion analysis of the myoActivation process.

Myofascial Trigger Point Identification in B-Mode Ultrasound: Texture Analysis Versus a Convolutional Neural Network Approach

OBJECTIVE

Myofascial pain syndrome (MPS) is one of the most common causes of chronic pain and affects a large portion of patients seen in specialty pain centers as well as primary care clinics. Diagnosis of MPS relies heavily on a clinician's ability to identify the presence of a myofascial trigger point (MTrP). Ultrasound can help, but requires the user to be experienced in ultrasound. Thus, this study investigates the use of texture features and deep learning strategies for the automatic identification of muscle with MTrPs (i.e., active and latent MTrPs) from normal (i.e., no MTrP) muscle.

METHODS

Participants (n = 201) were recruited from Toronto Rehabilitation Institute, and ultrasound videos of their trapezius muscles were acquired. This new data set consists of 1344 images (248 active, 120 latent, 976 normal) collected from these videos. For texture analysis, several features were investigated with varying parameters (i.e., region of interest size, feature type and pixel pair relationships). Convolutional neural networks (CNN) were also applied to observe the performance of deep learning approaches. Performance was evaluated based on the classification accuracy, micro F1-score, sensitivity, specificity, positive predictive value and negative predictive value.

RESULTS

The best CNN approach was able to differentiate between muscles with and without MTrPs better than the best texture feature approach, with F1-scores of 0.7299 and 0.7135, respectively.

CONCLUSION

The results of this study reveal the challenges associated with MTrP identification and the potential and shortcomings of CNN and radiomics approaches in detail.

Instrumented assisted soft tissue mobilization vs extracorporeal shock wave therapy in treatment of myofascial pain syndrome

BACKGROUND

Active myofascial trigger points (TrPs) often occur in the upper region of the upper trapezius (UT) muscle. These TrPs can be a significant source of neck, shoulder, and upper back pain and headaches. These TrPs and their related pain and disability can adversely affect an individual’s everyday routine functioning, work-related productivity, and general quality of life.

AIM

To investigate the effects of instrument assisted soft tissue mobilization (IASTM) vs extracorporeal shock wave therapy (ESWT) on the TrPs of the UT muscle.

METHODS

A randomized, single-blind, comparative clinical study was conducted at the Medical Center of the Egyptian Railway Station in Cairo. Forty patients (28 females and 12 males), aged between 20-years-old and 40-years-old, with active myofascial TrPs in the UT muscle were randomly assigned to two equal groups (A and B). Group A received IASTM, while group B received ESWT. Each group was treated twice weekly for 2 weeks. Both groups received muscle energy technique for the UT muscle. Patients were evaluated twice (pre- and post-treatment) for pain intensity using the visual analogue scale and for pain pressure threshold (PPT) using a pressure algometer.

RESULTS

Comparing the pre- and post-treatment mean values for all variables for group A, there were significant differences in pain intensity for TrP1 and TrP2 (P = 0.0001) and PPT for TrP1 (P = 0.0002) and TrP2 (P = 0.0001). Also, for group B, there were significant differences between the pre- and post-treatment pain intensity for TrP1 and TrP2 and PPT for TrP1 and TrP2 (P = 0.0001). There were no significant differences between the two groups in the post-treatment mean values of pain intensity for TrP1 (P = 0.9) and TrP2 (P = 0.76) and PPT for TrP1 (P = 0.09) and for TrP2 (P = 0.91).

CONCLUSION

IASTM and ESWT are effective methods for improving pain and PPT in patients with UT muscle TrPs. There is no significant difference between either treatment method.

Experiences of pain debut and healthcare received in men with chronic pelvic pain syndrome

BACKGROUND

Chronic Pelvic Pain Syndrome (CPPS) is the occurrence of chronic pelvic pain when there is no proven infection or other obvious local pathology that may account for the pain. It is often associated with negative cognitive, behavioural, sexual or emotional consequences, as well as with symptoms of lower urinary tract, sexual or bowel dysfunction. As there is a close link between psychosocial factors and the development of myofascial pain syndromes it is important for healthcare professionals to have knowledge of how the pain begins and the activities at the debut of the symptoms.

AIM

The aim of the study was to explore men's experiences of the process leading to CPPS and healthcare received.

METHODS

Information was obtained from semi-structured video interviews with 14 men with CPPS. Interviews were audio-recorded and transcribed. The text was then abstracted into codes and analysed with inductive content analysis.

RESULTS

The age of the informants ranged between 22 and 73 (median 48), and the duration with CPPS ranged from 1 to 46 years. Two themes emerged, one with the heading Struggling to pin it down with four subthemes and The helpful and unhelpful healthcare with two subthemes. The four subthemes show that the informants experienced difficulties in their lives in the months before the debut of symptoms, for some it was several years. They had specific triggers for the onset of pain. These included cold, trauma to the perineum, chlamydia infection and possibly secondary to a symptomatic urethral stricture. Confusion and frustration were an important element in the informants' overall experience of CPPS. Healthcare varied widely. The two subthemes about healthcare show expressions of being overlooked or wasting the doctor's time, but also the experience of being validated and being thoroughly examined.

CONCLUSION

The informants in our study described clear and specific triggers for CPPS such as being cold, having digestive issues and trauma to the perineum. Stressful events seemed to have a big impact on these informants and very possibly affected the start of symptoms. This information should be helpful healthcare professionals to understand the patient and his needs.

Myofascial pain syndrome in the oncologic patient: general considerations

This article aims to make visible a common non-oncologic pain condition in cancer patients. Myofascial pain syndrome can generate an increase in the symptomatic burden of the oncologic patient, increase the demand for opioid medication, and decrease the quality of life. We consider that health professionals involved in the care of cancer patients in its different stages should be aware of it, diagnose it, and treat it early to avoid processes of pain chronification, peripheral tissue modification, and deterioration of the functional condition of patients with oncologic diseases.

Comparison of immediate and delayed effects of superficial and deep dry needling in patients with upper trapezius myofascial trigger points

BACKGROUND

Dry needling is one of the most common treatments for this condition. In this study the immediate and delayed effects of superficial dry needling (SDN) and deep dry needling (DDN) on upper trapezius muscle function and patients' pain and disability was evaluated.

METHODS

In this quasi-experimental study, 47 women with active MTrPs were randomly divided into SDN and DDN groups and received one session treatment. Pain and disability were assessed before and one week after intervention with visual analogue scale (VAS) and neck disability index (NDI) questionnaire. Muscle activity was assessed by surface electromyography (sEMG) before, immediately and one week after intervention.

RESULTS

Both groups showed significant decrease in VAS (p < 0.001) and NDI (p < 0.001) after one week, however no significant difference were found between the groups (p > 0.05). A significant increase in sEMG activity was observed only in DDN group after one week (p < 0.007), but there were no significant differences in sEMG activity in SDN group after intervention and between the two groups (p > 0.05).

CONCLUSION

Both SDN and DDN could be effective in reducing pain and disability in patients with active MTrPs of upper trapezius muscle. Regarding muscle function DDN seems to be more effective. So that based on evaluation of the therapist in some cases with not significant muscle dysfunction SDN as a gentle and less invasive method could be used but for long term effectiveness and in those with significant muscle dysfunction DDN could be used.

Effects of Trigger Point Dry Needling on Strength Measurements and Activation Levels of the Gluteus Medius: A Quasi-Experimental Randomized Control Study

Background

Latent trigger points have been identified as a source of impaired muscle function giving rise to a reduction in force production and alterations in muscle activation patterns and movement efficiency. There is limited investigation into the effectiveness of a treatment in reducing these clinical manifestations.

Purpose

To investigate whether the application of trigger point dry needling (TDN) to latent trigger points within the gluteus medius musculature affected strength measurements and muscle activation levels immediately following intervention.

Design

Quasi experimental, single group, pretest-posttest, randomized control study.

Methods

A control and an intervention side were randomly assigned for each participant (N = 39). Hand held dynamometer (HHD) force measurements and raw surface electromyography (sEMG) amplitude readings were recorded during maximal volitional isometric contractions of the gluteus medius in two separate positions before and after application of TDN. Comparison of within and between group data were conducted.

Results

A statistically significant interaction between time (pre-TDN to post-TDN) and groups (intervention side and control side), p < 0.001 was found for HHD measurements in both positions. Post hoc analysis revealed a statistically significant difference (p < 0.001) for all comparisons in the side lying neutral (SL0) position, while statistically significant differences (p < 0.001) were found for pre and post-TDN measurements within intervention side as well as between the intervention and control side for post-TDN measurements in the side lying internal rotation (SLIR) position. For sEMG amplitude measurements, statistically significant differences were found only in the SL0 position for within group comparisons on the intervention side (p = 0.009) and for between group comparisons for post-TDN measurements (p = 0.002).

Conclusion

Application of TDN to latent trigger points within the gluteus medius can significantly increase gluteus muscle force production immediately following intervention while reducing the level of muscle activation required during contraction.

Level of Evidence

Level 2.

Intrafasciomembranal Fluid Pressure: A Novel Approach to the Etiology of Myalgias

Fascia is a continuous membrane (fasciomembrane) that enables differentiation of fluid pressure on either side. Fascia membrane also enables an internal increased fluid pressure at all muscle levels (fibers, fiber bundles, skeletal muscles, compartments), and the author introduces a new unifying term for these pressures, regardless of the anatomical level - the intrafasciomembranal fluid pressure (IFMFP). Swelling, pain, and loss of tissue function are identified as common cardinal symptoms in trigger point (TrP), chronic exertional compartment syndrome (CECS), overtraining syndrome (OTS), and delayed onset muscle soreness (DOMS). Existing literature and an overall assessment indicate that intramuscular conditions related to fluid flow and pressure play a central role in different conditions, providing a common biomechanical explanation of the etiology and influence, supporting the article's theory that an increased IFMFP plays a key role in these conditions.

Effect of adding a supervised physical therapy exercise program to photobiomodulation therapy in the treatment of cervicogenic somatosensory tinnitus: A randomized controlled study

OBJECTIVES

To evaluate the effectiveness of adding a supervised physical therapy exercise program to photobiomodulation therapy (PBMT) in the treatment of cervicogenic somatosensory tinnitus (CST).

METHODS

Forty patients suffering from CST with age 45-55 years were included in the study. They were assigned randomly into 2 groups, 20 per each. (Study group) Group (A) received a supervised physical therapy exercise program in addition to 20 minutes PBMT with a 650-nanometer wavelength and a 5 milliWatt power output, spot size of 1 cm2, and energy density of 6 Joules, 3 sessions per week for 8 consecutive weeks, plus traditional medical treatment. While (control group), group (B) received the same PBMT protocol, 3 sessions per week for 8 consecutive weeks in addition to the traditional medical treatment. Tinnitus visual analog scaling (VAS), tinnitus handicap inventory (THI), and cervical range of motion (ROM) were measured at baseline and after 8 weeks.

RESULTS

Mixed MANOVA showed a statistically significant reduction in tinnitus VAS, THI, and a significant improvement in cervical ROM (flexion, extension, right bending, left bending, right rotation, and left rotation) in favor of Group A (P < .05). There was a significant decrease in posttreatment VAS treatment (P > .001) MD [-2.05(-2.68:-1.41)], and THI relative to pretreatment mean difference [-5.35(-8.51: -2.19)] and a significant increase in posttreatment neck ROM in Groups A and B relative to pretreatment neck ROM (P > .001). Flexion range posttreatment MD[3.65(1.64:5.65)], Extension MD [6.55(1.35:11.75)], right bending MD[3.8(2.51:5.08)], left bending MD[1.75(0.19:3.3)], right rotation MD [3.5(1.28:5.71)] and left rotation [2.75(0.67:4.82)].

CONCLUSIONS

Adding a supervised physical therapy exercise program to PBMT showed positive and beneficial effects in the treatment of CST using VAS, THI, and Cervical ROM assessment tools.

Trigger point therapy – ischemic compression or perhaps cupping?

Study aim: To evaluate and compare the effectiveness of single ischemic compression and cupping therapy on the most common trigger point, on the descending part of the trapezius muscle.

Materials and methods: Twenty-five students (15 women and 10 men) aged 24.20 ± 1.27 years were enrolled in the study. The mobility of the cervical spine area was measured with a measuring tape. The pain pressure threshold of the trigger point of the trapezius muscle was tested using a Wagner FDX 50 Force Gage digital algometer. Each person participated in three tests with an interval of approximately one week between them. The following study protocol was followed; 1) cupping therapy, with a cup statically positioned on the trigger point for two minutes, 2) at a minimum interval of 7 days, ischemic compression performed with the thumb twice for 1 minute on each side 3) control test at an interval of another 7 days.

Results: Ischemic compression resulted in a statistically significant difference in cervical spine mobility scores (except for extension) and pain pressure threshold values. After applying cups, statistically significant differences were also observed in the results of cervical spine mobility and pain pressure threshold values. No statistically significant differences were found in the effectiveness of the therapies tested.

Conclusions: In the present study, single trigger point cupping and ischemic compression therapies improved cervical spine mobility and resulted in an increase in the pain pressure threshold in the trapezius muscle trigger point. These two therapies did not differ in terms of their effectiveness.

Positional release therapy and therapeutic massage reduce muscle trigger and tender points

OBJECTIVE

To determine if positional release therapy (PRT) or therapeutic massage (TM) was more effective in the treatment of trigger and tender points in the upper trapezius muscle.

BACKGROUND

Trigger points in the upper trapezius muscle are common and can be painful. Trigger points are commonly treated using TM however, PRT is a novel treatment that deserves further investigation.

METHODS

Sixty healthy male (24) and female (36) participants, (age = 27.1 ± 8.8 years, wt = 75.2 ± 17.9 kg, ht = 172.8 ± 9.7 cm) presenting with upper trapezius pain and a trigger point were recruited and randomized into either the TM or PRT group. Upper trapezius trigger points were found via palpation. Pain level was evaluated using a visual analog scale (VAS) and pain pressure threshold (PPT) was assessed using a pressure algometer. Muscle thickness was measured by B-mode ultrasound, while muscle stiffness was measured by shear-wave elastography (SWE). Participants were measured at baseline, posttreatment and again 48 h later.

RESULTS

Both treatments were effective in treatment of pain and muscle stiffness. Although no statistical group differences existed, treatment using PRT showed decreased pain averages and decreased pressure sensitivity at both post treatment, and 48 h later. Neither treatment was able to maintain the reduced muscle stiffness at the 48-h measure in males.

CONCLUSION

Both treatments showed a significant ability to reduce pain and acutely decrease muscle stiffness. Although not statistically different, clinically PRT is more effective at decreasing pain, and decreasing pressure sensitivity. Neither treatment method produced a long lasting effect on muscle stiffness in males.

Treatment of thoracic spine pain and pseudovisceral symptoms with dry needling and manual therapy in a 78-year-old female: A case report

DESIGN

Case Report.

BACKGROUND AND PURPOSE

Thoracic spine pain and movement dysfunction is a relatively common problem in the general population but has received little attention in research. Dry needling is frequently utilized by physical therapists and has been shown to reduce pain and improve function in areas, such as the cervical and lumbar spine, shoulder, hip, and knee. However, little research has been performed on the use of dry needling in the thoracic area with only two prior case studies being published. This case report documents the use of dry needling and manual therapy to treat a patient with symptoms of thoracic spine pain with concurrent pseudovisceral symptoms of chest pain and difficulty breathing.

CASE DESCRIPTION

The patient was a 78-year-old female who was referred to physical therapy with complaints of pain focused in her mid-thoracic spine radiating anteriorly into her chest. The patient underwent medical diagnostic tests prior to her referral to physical therapy to rule out cardiac pathology, pulmonary pathology, and fracture. She was treated with dry needling and manual therapy for a total of four sessions over a two-week period.

OUTCOMES

Fifteen days after her initial evaluation, the patient reported she was pain-free with a pain score of 0/10 on the VAS. She reported she was no longer taking pain medication or NSAIDS. She was able to return to normal daily activities without restriction and normal sleep pattern. Her score on the Oswestry disability index at intake was 42% impairment and 2% impairment after 4 treatments. At follow-up 6 weeks and 12 weeks after her discharge from physical therapy, the patient reported she continued to be pain-free.

Assessment of Myofascial Trigger Points via Imaging: A Systematic Review

ABSTRACT

This study systematically reviewed the published literature on the objective characterization of myofascial pain syndrome and myofascial trigger points using imaging methods. PubMed, Embase, Ovid, and the Cochrane Library databases were used, whereas citation searching was conducted in Scopus. Citations were restricted to those published in English and in peer-reviewed journals between 2000 and 2021. Of 1762 abstracts screened, 69 articles underwent full-text review, and 33 were included. Imaging data assessing myofascial trigger points or myofascial pain syndrome were extracted, and important qualitative and quantitative information on general study methodologies, study populations, sample sizes, and myofascial trigger point/myofascial pain syndrome evaluation were tabulated. Methodological quality of eligible studies was assessed based on the Quality Assessment of Diagnostic Accuracy Studies criteria. Biomechanical properties and blood flow of active and latent myofascial trigger points assessed via imaging were found to be quantifiably distinct from those of healthy tissue. Although these studies show promise, more studies are needed. Future studies should focus on assessing diagnostic test accuracy and testing the reproducibility of results to establish the best performing methods. Increasing methodological consistency would further motivate implementing imaging methods in larger clinical studies. Considering the evidence on efficacy, cost, ease of use and time constraints, ultrasound-based methods are currently the imaging modalities of choice for myofascial pain syndrome/myofascial trigger point assessment.

Is Dry Needling Applied by Physical Therapists Effective for Pain in Musculoskeletal Conditions? A Systematic Review and Meta-Analysis

OBJECTIVE

The main objective of this systematic review and meta-analysis was to determine the short-, medium-, and long-term effectiveness of dry needling (DN) applied by physical therapists to myofascial trigger points for the treatment of pain.

METHODS

PubMed, Scopus, SportDiscus, and Web of Science databases were searched from their inception to February 2020. Randomized controlled trials that compared DN with other treatments or placebo and measured pain with a visual analog Scale or another numerical pain rating scale were included. Two authors used a personalized form to collect the following data relevant to the objectives of the review from each article independently: study design, purpose, sample size, diagnosis, characteristics of DN intervention, characteristics of placebo intervention, outcome measures, period of assessment, body region, DN technique, and number of sessions. The initial search identified 1771 articles. After the selection, 102 articles were assessed for eligibility; 42 of these articles measuring pain were used for the meta-analysis. Four meta-analyses were performed according to the follow-up period from the last reported treatment.

RESULTS

This meta-analysis found a large effect to decrease pain within 72 hours (standardized mean difference [SMD] = -0.81; 95% CI = -1.21 to -0.40), a moderate effect in 1 to 3 weeks (SMD = -0.69; 95% CI = -1.02 to -0.35), a large effect in 4 to 12 weeks (SMD = -0.85; 95% CI = -1.30 to -0.40), and a large effect in 13 to 24 weeks (SMD = -0.81; 95% CI = -1.64 to -0.03). The risk of bias was generally low; however, the heterogeneity of the results downgraded the level of evidence.

CONCLUSIONS

Low-quality evidence that the immediate to 72-hour (large) effect, 4- to 12-week (large) effect, 13- to 24-week (large) effect, and moderate-quality 1- to 3-week (moderate) effect suggested that DN performed by physical therapists was more effective than no treatment, sham DN, and other therapies for reducing pain.

IMPACT

DN is commonly used by physical therapists to treat musculoskeletal pain, and it is very important for physical therapists to know the clinical conditions and time periods for which DN is effective in reducing pain in their patients.

Effectiveness of transcutaneous electrical nerve stimulation as an adjunct to selected physical therapy exercise program on male patients with pudendal neuralgia: A randomized controlled trial

OBJECTIVE

To assess the effectiveness of Transcutaneous Electrical Nerve Stimulation (TENS) combined with selected physical therapy exercise program on male patients with pudendal neuralgia.

DESIGN

A double-blinded randomized controlled study.

SETTING

Out-patient setting.

PARTICIPANTS

Fifty-two male participants with pudendal neuralgia (30-50 years) were allocated randomly into two groups; study and control. The same physical therapy exercises were applied to all participants, plus the same prescribed analgesic medication (Etodolac). Participants in the study group received additional TENS and sham TENS were given to those in control group.

INTERVENTION

Intervention lasted for 12 weeks, three sessions per week (60 minutes/session).

OUTCOME MEASURES

Numerical pain rating scale and daily Etodolac intake dose were measured before and after intervention.

RESULTS

Statistically significant differences were detected in numerical pain rating scale and daily Etodolac intake in favor of the study group (P < 0.05). After 12 weeks of intervention, the mean ± SD for numerical pain rating scale and daily Etodolac intake were 4.25 ± 1.9 and 259.25 ± 84.4 mg, in the study group, and 6.22 ± 2.22 and 355.55 ± 93.36 mg in the control group, respectively. The mean difference (95% CI) for numerical pain rating scale and daily Etodolac intake was -1.97 (-3.09: -0.83) and -96.3 (-144.9: -47.69), between groups post treatment, respectively.

CONCLUSION

Adding TENS to physical therapy exercise program is more effective than physical therapy program alone in improving pain in male patients with pudendal neuralgia as measured by numerical pain rating scale and daily analgesic intake dose.

Dry Needling Adds No Benefit to the Treatment of Neck Pain: A Sham-Controlled Randomized Clinical Trial With 1-Year Follow-up

OBJECTIVE

To examine the short- and long-term effectiveness of dry needling on disability, pain, and patient-perceived improvements in patients with mechanical neck pain when added to a multimodal treatment program that includes manual therapy and exercise.

DESIGN

Randomized controlled trial.

METHODS

Seventy-seven adults (mean ± SD age, 46.68 ± 14.18 years; 79% female) who were referred to physical therapy with acute, subacute, or chronic mechanical neck pain were randomly allocated to receive 7 multimodal treatment sessions over 4 weeks of (1) dry needling, manual therapy, and exercise (needling group); or (2) sham dry needling, manual therapy, and exercise (sham needling group). The primary outcome of disability (Neck Disability Index score) and secondary outcomes of pain (current and 24-hour average) and patient-perceived improvement were assessed at baseline and follow-ups of 4 weeks, 6 months, and 1 year by blinded assessors. Between-group differences were analyzed with a 2-way, repeated-measures analysis of variance. Global rating of change was analyzed with a Mann-Whitney U test.

RESULTS

There were no group-by-time interactions for disability (Neck Disability Index: F_2.37,177.47 = 0.42, P = .69), current pain (visual analog scale: F_2.84,213.16 = 1.04, P = .37), or average pain over 24 hours (F_2.64,198.02 = 0.01, P = .10). There were no between-group differences for global rating of change at any time point (P≥.65). Both groups improved over time for all variables (Neck Disability Index: F_2.37,177.47 = 124.70, P<.001; current pain: F_2.84,213.16 = 64.28, P<.001; and average pain over 24 hours: F_2.64,198.02 = 76.69, P<.001).

CONCLUSION

There were no differences in outcomes between trigger point dry needling and sham dry needling when added to a multimodal treatment program for neck pain. Dry needling should not be part of a first-line approach to managing neck pain. J Orthop Sports Phys Ther 2021;51(1):37-45. doi:10.2519/jospt.2021.9864.

Comparing muscle thickness and function in healthy people and subjects with upper trapezius myofascial pain syndrome using ultrasonography

BACKGROUND

The reliability of the muscle function using ultrasonography is not reported in patients with myofascial pain syndrome and healthy individuals. The main aim of this study was to compare muscle thickness and function of two matched healthy and patients groups with neck pain due to upper trapezius myofascial pain syndrome.

METHODS

40 subjects (20 healthy and 20 patients) participated in this study. Two examiners measured the upper trapezius thickness and function 3 times by ultrasonography independently in the test and retest sessions.

RESULTS

There were not significant differences between two groups with respect to demographic characteristics. The ICC values were good to excellent for both measurements. There were no significant differences between the two groups, in terms of upper trapezius muscle thickness in rest (p = 0.63), fair (p = 0.75) and normal (p = 0.73) contractions. On the other hand, % rest-thickness fair (p = 0.006), % rest-thickness normal (p = 0.006), % MVC-thickness (p = 0.02) showed significant differences between two healthy and myofascial pain syndrome groups.

CONCLUSIONS

Ultrasonography is a reliable technique used to measure muscle thickness and function. Muscle thickness in rest, fair and normal contractions is not different between the matched groups of healthy people and myofascial pain syndrome subjects. Additionally, muscle function is less in myofascial pain syndrome subjects than healthy people specially % MVC thickness.

Relationship between muscle spindles and myofascial trigger spots according to Hoffmann reflex pathway and tissue morphology characteristics in a rat model

OBJECTIVES

To determine how muscle spindles are involved in the pathophysiology of chronic myofascial trigger spots (MTrSs, similar to myofascial trigger points) in a rat injury model according to the characteristics of the Hoffmann reflex (H-reflex) and the anatomical relationship between muscle spindles and MTrSs.

METHODS

16 male Sprague-Dawley rats (7 weeks old) were randomly divided into experimental and control groups. A blunt strike injury and eccentric exercise were applied to the gastrocnemius muscle of rats in the experimental group once a week for 8 weeks as a MTrS modelling intervention. Subsequently, the rats were reared normally and rested for 4 weeks. At the end of the 12th week, the rats were examined for the presence of MTrSs defined by the detection of a palpable taut band exhibiting both a local twitch response and spontaneous electrical activity. After modelling, evocation of the H-reflex and morphological examination of muscle spindles and MTrSs were conducted.

RESULTS

The threshold (0.35±0.04 mA) of the H-reflex and latency (1.24±0.18 ms) of the M wave recorded at MTrSs were not significantly different to those at non-MTrSs (P>0.05). Compared with non-MTrSs, a lower Mmax (4.28±1.27 mV), higher Hmax (median (IQR) 0.95 (0.80-1.08) mV) and Hmax/Mmax (median (IQR) 0.21 (0.16-0.40)), and shorter H wave latency (4.60±0.89 ms) were recorded at MTrSs (P<0.05). Morphologically, there was a close anatomical relationship between the MTrS cells and the muscle spindles.

DISCUSSION

Compared with normal muscles, the H-reflex myoelectrical activity was enhanced and some muscle spindles might have been influenced by active MTrSs. Thus, muscle spindles may play an important role in the pathological mechanism underlying myofascial trigger points.

Deep Infection Following Dry Needling in a Young Athlete: An Underreported Complication of an Increasingly Prevalent Modality: A Case Report

CASE

Dry needling frequently is performed by a variety of practitioners for pain treatment. A 16-year-old boy had dry needling in the posterolateral aspect of the right thigh for treatment of pain after a knee injury. He developed an abscess on the posterolateral distal aspect of the right thigh deep to the site of the dry needling. Treatment included surgical drainage and intravenous antibiotics.

CONCLUSION

Deep infection is a rare but serious complication of dry needling. Standardized guidelines for safety and sterile technique with dry needling are needed to minimize the risk of infection.

Prevalence and sensitivity of trigger points in lumbo-pelvic-hip muscles in patients with patellofemoral pain syndrome

OBJECTIVES

Changes in the activity of the lumbo-pelvic-hip muscles have been established as a major cause of patellofemoral pain syndrome (PFPS), a common orthopedic problem. The present study aimed to compare the prevalence and sensitivity of myofascial trigger points (MTrPs) in lumbo-pelvic-hip muscles in persons with and without PFPS.

METHODS

Thirty women with PFPS and 30 healthy women 18-40 years old were recruited for this study. The prevalence of MTrPs was assessed by palpation, and pressure algometry was used to measure the pressure pain threshold. This study evaluated the areas where MTrPs are most commonly found in the lumbar muscles (internal oblique, erector spinae and quadratus lumborum), pelvic muscles (gluteus maximus, gluteus medius, gluteus minimus and piriformis), and hip muscles (hip adductor, quadriceps, hamstring, tensor fascia lata and sartorius). Independent t-tests were used to compare mean pressure pain thresholds between the two groups. Chi-squared tests were used to compare the prevalence of MTrPs.

RESULTS

The prevalence of MTrPs was significantly higher in most of the lumbo-pelvic-hip muscles in patients with PFPS compared to healthy persons. However, there were no significant differences between groups in the prevalence of MTrPs in the gluteus minimus or adductor muscles. The pressure pain threshold in lumbo-pelvic-hip muscles was lower in patients with PFPS compared to healthy participants.

CONCLUSION

In patients with PFPS the prevalence of MTrPs in the lumbo-pelvic-hip region was higher, and the pressure pain threshold was lower, than in healthy people. Thus therapy to treat PFPS should target the lumbo-pelvic-hip muscles.

Current Treatments for Female Pelvic Floor Dysfunctions

As global population aging, the issue of pelvic floor dysfunctions becomes increasingly. Millions of women were affected every year. The treatment of pelvic floor dysfunction has evolved in the past decade. This review aims to provide the current information on the treatment for female pelvic floor dysfunction, including pelvic organ prolapse (POP), urinary, fecal incontinence (FI), and myofascial pelvic pain among women. We used PubMed, Embase, and Web of Science to search for studies that were related to pelvic floor dysfunction regarding the POP, urinary, FI, and treatments. The development of laparoscopic surgery and synthetic and biological materials for pelvic floor reconstructive surgery were summarized. The surgical outcomes and complications of different pelvic floor reconstructive surgeries were compared. New devices for FI and the potential modified pelvic floor reconstructive surgery were also discussed here. Female pelvic medicine will continue to evolve for better treatment in the future. The pelvic floor reconstructive surgery tends to be minimally invasive approach with synthetic graft use.

Feasibility of a Support Vector Machine Classifier for Myofascial Pain Syndrome: Diagnostic Case-Control Study

OBJECTIVES

Myofascial pain syndrome (MPS) is the most common cause of chronic pain worldwide. The diagnosis of MPS is subjective, which has created a need for a robust quantitative method of diagnosing MPS. We propose that using a support vector machine (SVM) along with ultrasound (US) texture features can differentiate between healthy and MPS-affected skeletal muscle.

METHODS

B-mode US video data were collected in the upper trapezius muscle of healthy (29) participants and patients with active (21) and latent (19) MPS, using an acquisition method outlined in previous works. Regions of interest were extracted and filtered to obtain a unique set of 917 images where texture features were extracted from each region of interest to characterize each image. These texture features were then used to train 4 separate binary SVM classifiers using nested cross-validation to implement feature selection and hyperparameter tuning. The performance of each kernel was estimated on the data and validated through testing on a final holdout set.

RESULTS

The radial basis function kernel classifier had the greatest Matthews correlation coefficient performance estimate of 0.627 ± 0.073 (mean ± SD) along with the largest area under the curve of 91.0% ± 3.0%. The final holdout test for the radial basis function classifier resulted in 86.96 accuracy, a Matthews correlation coefficient of 0.724, 88% sensitivity, and 86% specificity, validating our earlier performance estimates.

CONCLUSIONS

We have demonstrated that specific US texture features that have been used in other computer-aided diagnostic literature are feasible to use for the classification of healthy and MPS muscle using a binary SVM classifier.

Dry needling equilibration theory: A mechanistic explanation for enhancing sensorimotor function in individuals with chronic ankle instability

Patients with chronic ankle instability (CAI) experience a dynamic interplay between impaired mechanical structures and sensorimotor deficiencies that contribute to recurrent sprains and sensations of instability. Concomitantly, muscular trigger points (MTrPs) are known to occur following trauma, maximal or submaximal concentric contractions, and unaccustomed eccentric loads. Additionally, MTrPs are theorized to be exacerbated in low-load and repetitive strain activities. MTrPs located within a muscle are associated with altered motor control, reaction delay, and decreased strength, deficits also found among those with CAI. Dry needling (DN) is reported to improve muscle range of motion, motor control, and pain in a myriad of neuromusculoskeletal conditions by decreasing spontaneous electrical activity and stiffness of taut muscle bands while improving filament overlap. Building on evidence supporting neuromechanical decoupling in chronic ligamentous injury with what is known about the development of MTrPs, this paper proposes a centrally mediated mechanism for improved sensorimotor function following DN for individuals with CAI. Dry needling equilibration theory (DNET) states that proprioception is improved following DN in the lower extremity by changing the muscle's length-tension relationship and leveraging minor acute discomfort to improve muscle spindle afferent information via the gamma motor system. The application of DNET for individuals with CAI may provide a mechanistic explanation for improved descending cortical output, resulting in enhanced sensorimotor function.

The Effect of Electric Stimulation Techniques on Pain and Tenderness at the Myofascial Trigger Point: A Systematic Review

Background

Myofascial pain is a prevalent chronic pain disorder, affecting a large proportion of the general population. Electric stimulation techniques such as transcutaneous electric stimulation (TENS) and electroacupuncture have been shown to be effective for managing chronic pain conditions including myofascial pain. The goal of this study was to review the literature on the effectiveness of electric stimulation techniques on myofascial pain.

Methods

A comprehensive systematic search of three databases—Medline, EMBASE, and Cochrane CENTRAL—was conducted using key words related to myofascial pain and trigger points, as well as various electric stimulation techniques. A total of 15 articles passed the inclusion and exclusion criteria for the study. Data were extracted from these studies and assessed qualitatively and quantitatively. Standardized mean differences (SMDs) were computed from pain intensity measures extracted from these studies. Subgroup analyses were performed to assess the effectiveness of treatment modality, number of treatment sessions, frequency of stimulation, location of treatment, and duration of treatment.

Results

The SMD for electric stimulation techniques on reported pain intensity was significant (P = 0.03), as was the SMD for the electroacupuncture subgroup (P = 0.02); the TENS subgroups’ effect was not significant (P = 0.17). The subgroup analyses tentatively suggest that frequency and number of treatments do not influence pain intensity, whereas the duration of treatment may have an effect. The qualitative results of this study revealed variability in the results among studies delivering TENS treatments.

Conclusions

Electric stimulation is effective at mitigating reported pain intensity at the location of the trigger point. Electroacupuncture presented with significant and larger effect sizes of improvement relative to TENS for reported pain intensity. Given that this review included a small number of studies, there is a need for additional research to confirm its findings. Additionally, studies assessing the parameters and physiological location of treatment are needed to inform the clinical use and recommendations of electric stimulation treatments.

Comparison of intravenous NSAIDs and trigger point injection for low back pain in ED: A prospective randomized study

INTRODUCTION

Low back pain (LBP) is a common complaint originating from muscles Myofascial pain syndrome (MPS) is mainly associated with trigger points (TrP) in the muscle tissue. We compared the intravenously administered non-steroidal anti-inflammatory drug (NSAID) and trigger point injection (TPI) in the treatment of LBP patients admitted to the emergency department due to pain caused by TrPs.

MATERIAL AND METHOD

After randomization, NSAID was administered intravenously in group 1 and TPIs were performed as specified by Travell and Simons in group 2. The TrPs were identified with the anamnesis and physical examination Demographic characteristics and vital signs of the patients were recorded. Pain scores were measured with the Visual Analogue Scale (VAS) at admission; and in minutes 5, 10, 15, 30, and 60.

RESULTS

There were 32 patients in group 1 and 22 patients in group 2. The demographics, vital signs, and pain scores at admission were not statistically significantly different between the groups. The pain scores decreased significantly in the TPI group. During the 60 min' follow-up period, the mean VAS pain score decreased by 0.41 ± 1.30 in the TPI group and by 2.59 ± 2.37 in the NSAID group (p < 0.001). Respond the treatment was significantly higher group TPI than Group NSAID (21/22 vs 20/32 respectively, p = 0.008).

CONCLUSION

In this small randomized study with several methodological limitations, TPI was superior to the intravenous NSAIDs in the treatment of acute LBP due to TrPs. TPI can be used in the emergency departments for the acute treatment of LBP in selected patients.

Subcutaneous accessory pain system (SAPS): A novel pain pathway for myofascial trigger points

Despite the accumulating neuro-physiological evidence of myofascial pain, many clinicians are skeptical about its existence as a separate disease entity. No single theory can fully explain the four cardinal features of MPS; taut bands, local tenderness, local twitching and the characteristic pattern of referred pain. Bridging the gap between basic and clinical knowledge mandates coupling the local trigger point changes with the clinically seen distant somatically innervated referred pain. The main question addressed by the present theory is why do trigger points behave differently in comparison to the surrounding muscle tissue and are trigger points the primary problem or secondary to a primary pathology. We propose that trigger points have an extra-innervation system that connect them with other spinal structures such as the facet, the annulus and other trigger points with a role for the subcutaneous fascia as part of trigger points pathogenesis or passage for the extra-innervation. The extra-innervation system is Subcutaneous accessory pain system (SAPS). The novel SAPS system connecting trigger points to the spinal segments via dorsal rami is presented. Individuals with this accessory pathway are prone to myofascial pain, trigger point activation and segmental referred somatic pain similar to other axial spinal structures. Despite the high prevalence of myofascial pain, the mechanism is not universally agreed upon. Why do the trigger points act differently from surrounding muscle tissue and are almost constant in location in different individuals is controversial. Why does myofascial pain and its two components, trigger points and referred pain, exist or are more prevalent in some individuals than in others is unexplained. The correlation between axial spinal structures pathology and the trigger points is not explored well. The existing theories about trigger point formation and referred pain is scientifically credible for each separate component and the SAPS novel system can provide the link between the two.

Dry Needling for Patients With Neck Pain: Protocol of a Randomized Clinical Trial

BACKGROUND

Neck pain is a costly and common problem. Current treatments are not adequately effective for a large proportion of patients who continue to experience recurrent pain. Therefore, new treatment strategies should be investigated in an attempt to reduce the disability and high costs associated with neck pain. Dry needling is a technique in which a fine needle is used to penetrate the skin, subcutaneous tissues, and muscle with the intent to mechanically disrupt tissue without the use of an anesthetic. Dry needling is emerging as a treatment modality that is widely used clinically to address a variety of musculoskeletal conditions. Recent studies of dry needling in mechanical neck pain suggest potential benefits, but do not utilize methods typical to clinical practice and lack long-term follow-up. Therefore, a clinical trial with realistic treatment time frames and methods consistent with clinical practice is needed to examine the effectiveness of dry needling on reducing pain and enhancing function in patients presenting to physical therapy with mechanical neck pain.

OBJECTIVE

The aim of this trial will be to examine the short- and long-term effectiveness of dry needling delivered by a physical therapist on pain, disability, and patient-perceived improvements in patients with mechanical neck pain.

METHODS

We will conduct a randomized, double-blind, placebo-controlled trial in accordance with the CONSORT guidelines. A total of 76 patients over the age of 18 with acute or chronic mechanical neck pain resulting from postural dysfunction, trauma, or insidious onset who are referred to physical therapy will be enrolled after meeting the eligibility criteria. Subjects will be excluded if they have previous history of surgery, whiplash in the last 6 weeks, nerve root compression, red flags, or contraindications to dry needling or manual therapy. Participants will be randomized to receive (1) dry needling, manual therapy, and exercise or (2) sham dry needling, manual therapy, and exercise. Participants will receive seven physical therapy treatments lasting 45 minutes each over a maximum of 4 weeks. The primary outcome will be disability as measured by the Neck Disability Index. Secondary outcomes include the following: pain, patient-perceived improvement, patient expectations, and successful blinding to the needling intervention. Outcome measures will be assessed at 4 weeks, 6 months, and 12 months by an assessor who is blind to the group allocation of the participants to determine the short- and long-term treatment effects. We will examine the primary aim with a two-way, repeated-measures analysis of variance with treatment group as the between-subjects variable and time as the within-subjects variable. The hypothesis of interest will be the two-way group by time interaction. An a priori alpha level of .05 will be used for all analyses.

RESULTS

Recruitment is currently underway and is expected to be completed by the end of 2017. Data collection for long-term outcomes will occur throughout 2017 and 2018. Data analysis, preparation, and publication submission is expected to occur throughout the final three quarters of 2018.

CONCLUSIONS

The successful completion of this trial will provide evidence to demonstrate whether dry needling is effective for the management of mechanical neck pain when used in a combined treatment approach, as is the common clinical practice.

TRIAL REGISTRATION

ClinicalTrials.gov NCT02731014; https://clinicaltrials.gov/ct2/show/NCT02731014 (Archived by WebCite at http://www.webcitation.org/6ujZgbhsq).

Histopathological nature of myofascial trigger points at different stages of recovery from injury in a rat model

Objective

To investigate the histopathological nature of myofascial trigger points (MTrPs) or spots (MTrSs) at different stages of recovery from injury in a rat model.

Methods

Forty Sprague–Dawley rats were randomly divided into two groups: a control group (CG) and experimental group (EG). The CG was further randomly subdivided into CG1 and CG2 subgroups. The CG2 was used for palpating the taut band and CG1 as a blank. EG was subdivided into three groups according to recovery times: 4 weeks (4W), 8 weeks (8W) and 12 weeks (12W); these groups consisted of eight rats each. All CG rats received no intervention, whereas the intervention in EG rats was by a blunt strike to the vastus medialis and eccentric exercise for 8 weeks. The taut bands with spontaneous electrical activity were then detected in the muscle to guide a muscle biopsy. The histopathological findings were investigated under optical and electron microscopes in all groups.

Results

Under optical microscopy, the differently augmented sizes of round fibres (contracture knots) with deep staining in the transverse section and fusiform shapes in a longitudinal view were clearly seen in CG2 and EGs with a large diameter; the number of contracture knots was significantly more in EGs than in CGs. Under an electron microscope, the mitochondria in EGs significantly decreased with abnormal structures. The sarcomeres were significantly shortened in the 8W and 12W EGs.

Conclusion

An injury can cause activation of MTrSs in a muscle and an activated level of MTrPs depending on the number of contracture knots in muscle with impaired energy production.

Comparison of the Effectiveness of Transcutaneous Electrical Nerve Stimulation and Interferential Therapy on the Upper Trapezius in Myofascial Pain Syndrome: A Randomized Controlled Study

OBJECTIVE

The aim of this study was to compare the effectiveness of transcutaneous electrical nerve stimulation and interferential therapy (IFT) both in combination with hot pack, myofascial release, active range of motion exercise, and a home exercise program on myofascial pain syndrome patients with upper trapezius myofascial trigger point.

DESIGN

A total of 105 patients with an upper trapezius myofascial trigger point were recruited to this single-blind randomized controlled trial. Following random allocation of patients to three groups, three therapeutic regimens-control-standard care (hot pack, active range of motion exercises, myofascial release, and a home exercise program with postural advice), transcutaneous electrical nerve stimulation-standard care and IFT-standard care-were administered eight times during 4 wks at regular intervals. Pain intensity and cervical range of motions (cervical extension, lateral flexion to the contralateral side, and rotation to the ipsilateral side) were measured at baseline, immediately after the first treatment, before the eighth treatment, and 1 wk after the eighth treatment.

RESULTS

Immediate and short-term improvements were marked in the transcutaneous electrical nerve stimulation group (n = 35) compared with the IFT group (n = 35) and the control group (n = 35) with respect to pain intensity and cervical range of motions (P < 0.05). The IFT group showed significant improvement on these outcome measurements than the control group did (P < 0.05).

CONCLUSION

Transcutaneous electrical nerve stimulation with standard care facilitates recovery better than IFT does in the same combination.

Dry Needling Combined With Physical Therapy in Patients With Chronic Postsurgical Pain Following Total Knee Arthroplasty: A Case Series

Study Design Case series. Background This case series describes a combined program of dry needling and therapeutic exercise in a small group of patients with persistent pain following total knee arthroplasty (TKA). Case Description Fourteen patients who underwent TKA had persistent postsurgical pain and myofascial trigger points that were nonresponsive to treatment with conventional physical therapy and/or medication. The patients received a weekly dry needling treatment in combination with therapeutic exercises for 4 weeks. Pain perception was assessed preintervention and postintervention with a visual analog scale and function was assessed with the Western Ontario and McMaster Universities Osteoarthritis Index, 6-minute walk test, timed up-and-go test, 30-second chair-stand test, and knee joint range of motion. Outcomes After TKA, the patients had a mean ± SD symptom duration of 6.3 ± 3.1 months. Subsequent to dry needling, patients reported a significant mean ± SD decrease in pain intensity from 55.6 ± 6.6 to 19.3 ± 5.6 (P<.001) and improvements in Western Ontario and McMaster Universities Osteoarthritis Index scores from 10.1 ± 0.8 to 4.9 ± 1.0 for pain (P<.001), from 5.3 ± 0.4 to 2.4 ± 1.2 for stiffness (P<.001), and from 36.7 ± 2.0 to 20.1 ± 3.2 for function (P<.001). Knee flexion increased from a mean ± SD of 82.7° ± 5.2° to 93.3° ± 4.3° (P<.001), and joint extension improved from 15.8° ± 2.9° to 5.3° ± 2.4° (P<.05). The 6-minute walk test also showed improvement in postintervention values from a mean ± SD of 391.4 ± 23.7 to 424.7 ± 28.4 m (P<.05). Discussion After dry needling combined with therapeutic exercises, patients who had chronic pain following TKA showed clinically significant improvements in pain, range of motion, function, and myofascial trigger points. Future randomized clinical trials should further investigate the effectiveness of this protocol under similar conditions. Level of Evidence Therapy, level 4. J Orthop Sports Phys Ther 2017;47(3):209-216. Epub 3 Feb 2017. doi:10.2519/jospt.2017.7089.

The Effectiveness of Trigger Point Dry Needling for Musculoskeletal Conditions by Physical Therapists: A Systematic Review and Meta-analysis

Study Design Systematic review and meta-analysis. Background An increasing number of physical therapists in the United States and throughout the world are using dry needling to treat musculoskeletal pain. Objective To examine the short- and long-term effectiveness of dry needling delivered by a physical therapist for any musculoskeletal pain condition. Methods Electronic databases were searched. Eligible randomized controlled trials included those with human subjects who had musculoskeletal conditions that were treated with dry needling performed by a physical therapist, compared with a control or other intervention. The overall quality of the evidence was assessed using the Grading of Recommendations Assessment, Development and Evaluation. Results The initial search returned 218 articles. After screening, 13 were included. Physiotherapy Evidence Database quality scale scores ranged from 4 to 9 (out of a maximum score of 10), with a median score of 7. Eight meta-analyses were performed. In the immediate to 12-week follow-up period, studies provided evidence that dry needling may decrease pain and increase pressure pain threshold when compared to control/sham or other treatment. At 6 to 12 months, dry needling was favored for decreasing pain, but the treatment effect was not statistically significant. Dry needling, when compared to control/sham treatment, provides a statistically significant effect on functional outcomes, but not when compared to other treatments. Conclusion Very low-quality to moderate-quality evidence suggests that dry needling performed by physical therapists is more effective than no treatment, sham dry needling, and other treatments for reducing pain and improving pressure pain threshold in patients presenting with musculoskeletal pain in the immediate to 12-week follow-up period. Low-quality evidence suggests superior outcomes with dry needling for functional outcomes when compared to no treatment or sham needling. However, no difference in functional outcomes exists when compared to other physical therapy treatments. Evidence of long-term benefit of dry needling is currently lacking. Level of Evidence Therapy, level 1a. J Orthop Sports Phys Ther 2017;47(3):133-149. Epub 3 Feb 2017. doi:10.2519/jospt.2017.7096.

Selenium and Zinc Status in Chronic Myofascial Pain: Serum and Erythrocyte Concentrations and Food Intake

INTRODUCTION

Nutritional disorders have been reported to be important causal factors that can intensify or cause a painful response in individuals with chronic musculoskeletal pain.

AIM

To assess the habitual intake of and the serum and erythrocyte levels of selenium and zinc in patients with chronic myofascial pain.

MATERIALS AND METHODS

A case-control study of 31 patients with chronic myofascial pain (group I) and 31 subjects without pain (group II). Dietary record in five days for assessing food intake were used. The serum and erythrocyte concentrations of selenium and zinc were analyzed using an atomic absorption spectrophotometry. Pain intensity was assessed using a visual analog scale.

RESULTS

The group of patients with chronic myofascial pain, compared with the control group, showed a lower erythrocyte concentration of selenium (79.46 ± 19.79 μg/L vs. 90.80 ± 23.12 μg/L; p = 0.041) and zinc (30.56 ± 7.74 μgZn/gHb vs. 38.48 ± 14.86 μgZn/gHb, respectively; p = 0.004). In this study, a compromised food intake of zinc was observed in the majority of the subjects in both groups. The selenium intake was considered to be safe in 80% of the subjects in both groups; however, the likelihood of inadequate intake of this mineral was twice as high in group I (49.5% vs. 24.4%, respectively). In the logistic regression analysis, the erythrocyte concentration of zinc was associated with the presence of pain. In each additional 1 mg of Zn2+ per gram of hemoglobin, a reduction of 12.5% was observed in the risk of the individual having chronic myofascial pain (B = -0.133; adjusted OR = 0.875, 95% CI = 0.803 to 0.954, Wald = 9.187, standard error = 0.044, p = 0.002). Physical inactivity and obesity were noted more commonly in group I compared with the control group.

CONCLUSION

In this study, patients with chronic myofascial pain showed lower intracellular stores of zinc and selenium and inadequate food intake of these nutrients.

The short-term effects of trigger point therapy, stretching and medicine ball exercises on accuracy and back swing hip turn in elite, male golfers - A randomised controlled trial

OBJECTIVES

This study aimed to compare the effect of myofascial trigger point therapy (MTPT) and stretching, MTPT and medicine ball exercises, and no intervention, on hip flexor length (HFL), golf swing biomechanics and performance in elite, male golfers.

DESIGN

Single blind, randomised controlled trial with two experimental groups (stretch group: MTPT and stretching; and the ball group: MTPT, a single stretch and medicine ball exercises) and one control group (no intervention).

SETTING

Professional golf academy.

PARTICIPANTS

One hundred, elite, male golfers aged 16-25 years.

MAIN OUTCOME MEASURES

HFL, 3D biomechanical analysis of the golf swing, club head speed (CHS), smash ratio, accuracy and distance at baseline and after the interventions.

RESULTS

Backswing hip turn (BSHT) improved in the ball group relative to the control group (p = 0.0248). Accuracy in the ball group and the stretch group improved relative to the control group (Fisher's exact = 0.016).

CONCLUSIONS

Other performance parameters such as: smash ratio, distance and CHS were not compromised by either intervention. This study advocates the use of MTPT combined with medicine ball exercises over MTPT combined with stretching in the treatment of golfers with shortened hip flexors - even immediately preceding a tournament.

A critical overview of the current myofascial pain literature - January 2016

Reflecting on the past year, the number of publications on myofascial pain continues to increase in a steady rate. The current review includes 30 basic and clinical studies, case reports, reviews, and reports from fifteen different countries about trigger points (TrP), myofascial pain (MP), dry needling (DN) and other related interventions. We are pleased that during 2015 this article made the top 15 of most downloaded articles as many as three times! In general, the quality of published papers is improving as well. Nevertheless, several papers included in this overview, mention the application of "ischemic compression", which is a questionable concept in the context of TrP inactivation. As we have outlined previously, in the current thinking about myofascial pain, TrPs feature significant hypoxia and a lowered pH (Ballyns et al., 2011; Shah and Gilliams, 2008), and attempts to induce more ischemia would be counterproductive. Already in 1999, Simons, Travell and Simons changed the terminology from ischemic compression to TrP compression (Simons et al., 1999) and we recommend that contemporary researchers and clinicians adopt the new terminology and stop using the term "ischemic compression."

Multi-Acupuncture Point Injections and Their Anatomical Study in Relation to Neck and Shoulder Pain Syndrome (So-Called Katakori) in Japan

Katakori is a symptom name that is unique to Japan, and refers to myofascial pain syndrome-like clinical signs in the shoulder girdle. Various methods of pain relief for katakori have been reported, but in the present study, we examined the clinical effects of multi-acupuncture point injections (MAPI) in the acupuncture points with which we empirically achieved an effect, as well as the anatomical sites affected by liquid medicine. The subjects were idiopathic katakori patients (n = 9), and three cadavers for anatomical investigation. BL-10, GB-21, LI-16, SI-14, and BL-38 as the WHO notation were selected as the acupuncture point. Injections of 1 mL of 1% w/v mepivacaine were introduced at the same time into each of these points in the patients. Assessment items were the Pain Relief Score and the therapeutic effect period. Dissections were centered at the puncture sites of cadavers. India ink was similarly injected into each point, and each site that was darkly-stained with India ink was evaluated. Katakori pain in the present study was significantly reduced by MAPI. Regardless of the presence or absence of trigger points, pain was significantly reduced in these cases. Dark staining with India ink at each of the points in the anatomical analysis was as follows: BL-10: over the rectus capitis posterior minor muscle and rectus capitis posterior major muscle fascia; GB-21: over the supraspinatus muscle fascia; LI-16: over the supraspinatus muscle fascia; SI-14: over the rhomboid muscle fascia; and BL-38: over the rhomboid muscle fascia. The anatomical study suggested that the drug effect was exerted on the muscles above and below the muscle fascia, as well as the peripheral nerves because the points of action in acupuncture were darkly-stained in the spaces between the muscle and the muscle fascia.

Spontaneous electrical activities at myofascial trigger points at different stages of recovery from injury in a rat model

Background

Spontaneous electrical activity (SEA) is a feature of myofascial trigger points (MTrPs), which can either be latent or active. However, SEA at different stages of recovery from MTrPs remains unclear.

Objective

To investigate the temporal changes in the nature of SEA after generation of MTrPs in a rat model.

Methods

32 rats were divided into four groups: 24 rats were assigned to experimental groups (EGs), which underwent the MTrP modelling intervention and 8 were allocated to a control group (CG). All EG rats received a blunt strike to the left vastus medialis combined with eccentric exercise for 8 weeks. After modelling, the EG rats were subdivided into three groups with total recovery times of 4, 8 and 12 weeks (EG-4w, EG-8w and EG-12w, respectively). Taut bands (TBs) with and without the presence of active MTrPs were identified in the left hind limb muscles of all rats, verified by SEA and further examined with electromyography recordings. Myoelectrical signals were also categorised into one of five types.

Results

CG rats had fewer TBs than EG rats and EGs showed variable frequencies of SEA. SEA frequencies were higher in EG-4w than in EG-8w and EG-12w groups (240.57±72.9 vs 168.14±64.5 and 151.63±65.4, respectively, p<0.05) and were significantly greater in all EGs than in the CG (55.75±21.9). Relative to CG rats, amplitudes and durations of electrical potentials in the EG were only increased in the EG-8w and EG-12w groups. Types IV and V myoelectrical signals were never seen in latent MTrPs and type V signals did not occur in EG-4w rats.

Conclusions

Increasing recovery periods following a MTrP modelling intervention in rats are characterised by different frequencies and amplitudes of SEA from TBs.

Trial registration number

2014012.

Myofascial low back pain treatment

Myofascial pain is a common musculoskeletal problem, with the low back being one of the commonest affected regions. Several treatments have been used for myofascial low back pain through physical therapies, pharmacologic agents, injections, and other such therapies. This review will provide an update based on recently published literature in the field of myofascial low back pain along with a brief description of a sequenced, multidisciplinary treatment protocol called Skilled Hands-on Approach for the Release of myofascia, Articular, Neural and Soft tissue mobilization (SHARANS) protocol. A comprehensive multidisciplinary approach is recommended for the successful management of individuals with myofascial low back pain.